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USACE / NAVFAC / AFCESA / NASA NASA-05500S (December 2005)
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Preparing Activity:
NASAMasterFormatTM 2004 - 05 50 00.00 40
Superseding
NASA-05500 (May 2005)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are NOT in agreement with UMRL
References will be in agreement at next scheduled update of UMRL
Section Table of Contents
SECTION 05500S
METAL FABRICATIONS
12/05
PART 1 GENERAL
1.1 REFERENCES
1.2 SUBMITTALS
1.3 METALWORK REQUIREMENTS
1.4 QUALIFICATIONS FOR WELDING WORK
1.5 DRAINAGE HOLES
PART 2 PRODUCTS
2.1 STRUCTURAL STEEL PLATES, SHAPES, AND BARS
2.2 STRUCTURAL STEEL TUBING
2.3 HOT-ROLLED CARBON STEEL BARS AND BAR SIZE SHAPES
2.4 HOT-ROLLED CARBON STEEL SHEETS AND STRIPS
2.5 COLD-ROLLED CARBON STEEL SHEETS
2.6 GALVANIZED CARBON STEEL SHEETS
2.7 GRAY IRON CASTINGS
2.8 MALLEABLE IRON CASTINGS
2.9 RAISED PATTERN STEEL FLOOR PLATES
2.10 STEEL BAR GRATING
2.11 ANCHORAGE MATERIALS
2.12 FASTENING MATERIALS
2.13 PAINT MATERIALS
2.14 GENERAL FABRICATION
2.14.1 Workmanship
2.14.2 Holes for Other Work
2.14.3 Galvanizing
2.14.4 Shop Painting
2.15 MISCELLANEOUS METAL ITEMS
2.15.1 Access Panels and Frames for Masonry Walls
2.15.2 Cast Abrasive Thresholds
2.15.3 Curb Edge Bars
2.15.4 Floor Gratings and Frames
2.15.5 Floor Plate Covers and Frames
2.15.6 Ladders
2.15.7 Ladder Safety Cages
2.15.8 Loose Steel Lintels
2.15.9 Metal Safety Nosing for Concrete Treads
2.15.10 Miscellaneous Steel Framing and Supports
2.15.11 Roof Scuttles
2.15.12 Safety Chains
2.15.13 Shelf Angles
2.15.14 Steel Pipe Railings
2.15.15 Steel Stairs
2.15.15.1 Stair Framing
2.15.15.2 Metal Pan Risers, Subtreads, and Subplatforms
2.15.15.3 Steel Floor Plate Treads
2.15.15.4 Floor Grating Treads and Platforms
2.15.15.5 Stair Railings and Handrails
2.15.15.6 Soffit Clips
2.15.15.7 Exterior Stairs
2.15.15.8 Workmanship
2.16 STEEL DOOR FRAMES
2.17 WHEEL GUARDS
2.18 WIRE MESH PARTITIONS
2.18.1 Vertical Reinforcement
2.18.2 Top Capping
2.18.3 Corner Posts
2.18.4 Swing Doors
2.18.5 Sliding Doors
2.18.6 Door Hardware
2.18.7 Service Windows
2.19 WIRE MESH WINDOW GUARDS
PART 3 EXECUTION
3.1 GENERAL
3.2 ANCHORAGE DEVICES EMBEDDED IN OTHER CONSTRUCTION
3.3 FASTENING TO CONSTRUCTION-IN-PLACE
3.4 CUTTING AND FITTING
3.5 SETTING MASONRY ANCHORAGE DEVICES
3.6 FIELD WELDING
3.7 THREADED CONNECTIONS
3.8 STEEL PIPE RAILINGS
3.9 STRUCTURAL STEEL DOOR FRAMES
3.10 WHEEL GUARDS
3.11 WIRE MESH WINDOW GUARDS
3.12 COUNTER SHUTTER
3.13 TOUCHUP PAINTING
3.14 RAISED PATTERN FLOOR PLATES
3.15 STEEL BAR GRATING
SECTION 05500S
METAL FABRICATIONS
NOTE: Delete, revise, or add to the text in this section to cover project requirements.
Notes are for designer information and will not appear in the final project specification.
This section covers utilitarian metal products, customarily manufactured to
meet specific requirements in building construction and fabricated steel not
a part of the structural steel framework.
Drawings must include a complete design indicating the character of the work
to be performed and giving the following:
Location and details of each fabricated metal item showing all dimensions, shapes,
and sizes of members, connections, holes for other work, and the relation of
fabricated metal items to other building components
Anchorage devices embedded in other construction
Location of galvanized fabricated metal items in interior locations when the
same item is not required to be galvanized in all interior locations
Metal connection materials and anchorage devices required for precast concrete
wall panels, precast concrete structural members, and precast concrete roof
decking are specified in Division 3, "Concrete."
Metal anchors, anchor slots, and ties for brick and block masonry, structural
glazed tile, and precast stone work are specified in Division 4, "Masonry."
Structural steel framework, including steel bar grating, steel floor plates,
and structural steel door frames that are a part of the structural steel framework,
are specified in Section 05120S STRUCTURAL STEEL."
Loose bearing plates and anchorage devices for steel joists are specified in
Section 05210S STEEL JOISTS.
Miscellaneous metal products used in building construction for functional, architectural,
and decorative effects, such as aluminum railings, aluminum joint cover assemblies,
extruded aluminum louvers, building letters, and stamped metal decorative grills,
are specified in the Section 05700S ORNAMENTAL METAL.
Carpenters iron for carpentry, wood roof decks, wood fiber roof deck, and metal
studs; and anchorage devices for gypsum wall board are specified in Division
6, "Wood and Plastics."
Sheet metal work, (including metal flashing, metal louvers, metal gutters and
downspouts, and cast iron downspout boots), metal roofing and siding, gravity
roof ventilators, and anchorage devices are specified in Division 7, "Thermal
and Moisture Protection."
Hollow metal frames, UL-labeled steel door frames, metal doors (including louvers),
metal windows (including window stools), metal curtain wall systems, finish
hardware (including extruded aluminum thresholds), and anchorage devices are
specified in Division 8, "Doors and Windows."
Metal ceiling suspension systems, metal furring systems, and metal access panels
for plaster and acoustical work; metal studs for plastered partitions; metal
divider strips for terrazzo work; metal trim for resilient flooring and vinyl
wall coverings; and anchorage devices are specified in Division 9, "Finishes."
Finish painting is specified in Section 09970S COATINGS FOR STEEL and Section
09920S ARCHITECTURAL PAINTING.
Metal partitions, metal lockers, metal toilet accessories, and anchorage devices
are specified in Division 10, "Specialties."
Metal tracks and anchorage devices for venetian blinds are specified in Division
12, "Furnishings."
Elevator guide rails, brackets, and all structural steel required for elevators
except hoistways structural steel, elevator machine beam supports, and steel
lintels over hoistway door openings and thresholds for elevator hoistway entrances
are specified in Division 14, "Conveying Systems."
Metal supports, sleeves, construction castings (including manhole covers, frames,
and steps), wire mesh machinery guards, and anchorage devices required for mechanical
equipment, piping, ducts, and other mechanical systems are specified in Division
15, "Mechanical."
Metal supports, sleeves, construction castings (including manholes, covers,
frames and steps) and anchorage devices required for electrical equipment, conduit,
and other electrical systems are specified in Division 16, "Electrical."
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC) |
|
AISC 317 | | (1992) Manual of Steel Construction, Volume
II, Connections |
AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) |
|
ANSI B18.22.1 | | (1975; R 2003) Plain Washers |
|
ANSI B18.22M | | (1981; R 2000) Metric Plain Washers |
AMERICAN WELDING SOCIETY (AWS) |
|
AWS A5.1 | | (2003) Specification for Carbon Steel Electrodes
for Shielded Metal Arc Welding |
|
AWS D1.1/D1.1M | | (2004) Structural Welding Code-Steel |
ASME INTERNATIONAL (ASME) |
|
ASME B18.2.1 | | (1996) Square and Hex Bolts and Screws, Including
Hex Cap and Lag Screws (Inch Series) |
|
ASME B18.2.3.8M | | (1981; R 1999) Metric Hex Lag Screws |
|
ASME B18.21.1 | | (2000) Lock Washers (Inch Series) |
|
ASME B18.21.2M | | (2000) Lock Washers (Metric Series) |
|
ASME B18.6.3 | | (1998) Machine Screws and Machine Screw Nuts |
|
ASME B18.6.7M | | (2000) Metric Machine Screws |
ASTM INTERNATIONAL (ASTM) |
|
ASTM A 1011/A 1011M | | (2004a) Standard Specification for Steel, Sheet,
and Strip, Hot-Rolled, Carbon, Structural, High-Strength
Low-Alloy and High-Strength Low-Alloy with Improved
Formability |
|
ASTM A 123/A 123M | | (2002) Standard Specification for Zinc (Hot-Dip
Galvanized) Coatings on Iron and Steel Products |
|
ASTM A 153/A 153M | | (2005) Standard Specification for Zinc Coating
(Hot-Dip) on Iron and Steel Hardware |
|
ASTM A 27/A 27M | | (2003) Standard Specification for Steel Castings,
Carbon, for General Application |
|
ASTM A 283/A 283M | | (2003) Standard Specification for Low and Intermediate
Tensile Strength Carbon Steel Plates |
|
ASTM A 307 | | (2004) Standard Specification for Carbon Steel
Bolts and Studs, 60 000 psi Tensile Strength |
|
ASTM A 36/A 36M | | (2004) Standard Specification for Carbon Structural
Steel |
|
ASTM A 366/A 366M | | (1997e1) Standard Specification for Steel, Sheet,
Carbon, Cold-Rolled, Commercial Quality |
|
ASTM A 446/A 446M | | (2003) Standard Specification for Steel Sheet,
Zinc-Coated (Galvanized) by the Hot-Dip Process,
Structural (Physical) Quality |
|
ASTM A 467/A 467M | | (2001) Standard Specification for Machine Coil
and Chain |
|
ASTM A 47/A 47M | | (1999) Standard Specification for Ferritic Malleable
Iron Castings |
|
ASTM A 48/A 48M | | (2003) Standard Specification for Gray Iron
Castings |
|
ASTM A 500 | | (2003a) Standard Specification for Cold-Formed
Welded and Seamless Carbon Steel Structural
Tubing in Rounds and Shapes |
|
ASTM A 501 | | (2001) Standard Specification for Hot-Formed
Welded and Seamless Carbon Steel Structural
Tubing |
|
ASTM A 513 | | (2000) Electric-Resistance-Welded Carbon and
Alloy Steel Mechanical Tubing |
|
ASTM A 525 | | (1993) Standard Specification for General Requirements
for Steel Sheet, Zinc-Coated (Galvanized) by
the Hot-Dip Process |
|
ASTM A 525M | | (1991; Rev A) Standard Specification for General
Requirements for Steel Sheet, Zinc-Coated (Galvanized)
by the Hot-Dip Process (Metric) |
|
ASTM A 526/A 526M | | (1990) Standard Specification for Steel Sheet,
Zinc-Coated (Galvanized) by the Hot-Dip Process,
Commercial Quality |
|
ASTM A 53/A 53M | | (2004a) Standard Specification for Pipe, Steel,
Black and Hot-Dipped, Zinc-Coated, Welded and
Seamless |
|
ASTM A 563 | | (2004) Standard Specification for Carbon and
Alloy Steel Nuts |
|
ASTM A 563M | | (2003) Standard Specification for Carbon and
Alloy Steel Nuts (Metric) |
|
ASTM A 570/A 570M | | (1998) Standard Specification for Steel, Sheet
and Strip, Carbon, Hot-Rolled, Structural Quality |
|
ASTM A 575 | | (2002) Standard Specification for Steel Bars,
Carbon, Merchant Quality, M-Grades |
|
ASTM A 786/A 786M | | (200b) Hot-Rolled Carbon, Low-Alloy, High Strength
Low-Alloy, and Alloy Steel Floor Plates |
|
ASTM B 26/B 26M | | (2003) Standard Specification for Aluminum-Alloy
Sand Castings |
|
ASTM C 387 | | (2000e1) Standard Specification for Packaged,
Dry, Combined Materials for Mortar and Concrete |
|
ASTM C 514 | | (2001) Standard Specification for Nails for
the Application of Gypsum Board |
|
ASTM E 621 | | (1994; R 1999e1) Standard Practice for Use of
Metric (SI) Units in Building Design and Construction |
|
ASTM F 568M | | (2004) Standard Specification for Carbon and
Alloy Steel Externally Threaded Metric Fasteners |
NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS (NAAMM) |
|
NAAMM MBG 531 | | (1988; MBG 531S-89) Metal Bar Grating Manual |
THE SOCIETY FOR PROTECTIVE COATINGS (SSPC) |
|
SSPC Paint 20 | | (2000) Zinc-Rich Coating Type I Inorganic and
Type II Organic |
|
SSPC Paint 25 | | (1997; 2004e1) Zinc Oxide, Alkyd, Linseed Oil
Primer for Use Over Hand Cleaned Steel Type
I and Type II |
|
SSPC SP 10 | | (2000) Joint Surface Preparation, Standard Near-White
Metal Blast Cleaning (NACE No. 2) |
U.S. GENERAL SERVICES ADMINISTRATION (GSA) |
|
FS FF-B-588 | | (Rev D) Bolt, Toggle; and Expansion Sleeve,
Screw |
|
FS FF-S-325 | | (Int Amd 3) Shield, Expansion; Nail, Expansion;
and Nail, Drive Screw (Devices, Anchoring, Masonry) |
|
FS RR-T-650 | | (1988d) Treads, Metallic and Non-Metallic, Skid
Resistant |
U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA) |
|
29 CFR 1910 | | (2001) Occupational Safety and Health Standards |
1.2 SUBMITTALS
NOTE: Review Submittal Description (SD) definitions in Section 01330 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] Submit the following
in accordance with Section
01330
01330
01330 SUBMITTAL PROCEDURES:
SD-02 Shop Drawings
Fabrication drawings for the following items shall be in accordance with the paragraph entitled,
"General Fabrication," of this section.
Structural Steel
Joints
Castings
Installation drawings for Miscellaneous Metal Items shall include location, dimensions, size,
and weight or thickness as applicable to the members, type and location of welded connections,
location and details of anchorage devices that are to be embedded in cast-in-place concrete
and masonry construction, and any other pertinent construction and erection details.
SD-03 Product Data
Manufacturer's catalog data shall be submitted for the following items:
Structural Steel Plates, Shapes, and Bars
Structural Steel Tubing
Hot-Rolled Carbon Steel Bars and Bar Size Shapes
Hot-Rolled Carbon Steel Sheets and Strips
Cold-Rolled Carbon Steel Sheets
Galvanized Carbon Steel Sheets
Gray Iron Castings
Malleable Iron Castings
Raised Pattern Steel Floor Plates
Steel Bar Grating
Access Panels and Frames
Roof Scuttles
Steel Pipe Railing
Wheel Guards
Wire Mesh Partitions
Wire Mesh Window Guards
Anchorage Materials
Paint Materials
Fastening Materials
Miscellaneous Metal Items
SD-04 Samples
Contractor shall submit one full-size sample, each type, for the following. After approval,
full-size samples may be used in the construction, provided each sample is clearly identified
and its location recorded.
Cast Abrasive Thresholds
Metal Safety Nosing for Concrete Treads
Anchorage Materials
Fastening Materials
Lock Cylinder
SD-07 Certificates
Welding Procedures shall be in accordance with AWS D1.1/D1.1M.
Certificates for Welder Qualifications shall be in accordance with the paragraph entitled, "Qualifications
for Welding Work," of this section.
Certificates shall be provided for Miscellaneous Metal Items showing conformance with the referenced
standards contained in this section.
SD-08 Manufacturer's Instructions
Manufacturers instructions covering installation of Miscellaneous Metal Items shall be submitted.
1.3 METALWORK REQUIREMENTS
For items not specifically described in these specifications, materials and workmanship shall conform to the
accepted standard practices of the trades. Supplementary parts necessary to complete each item shall be furnished
and installed. Anchors, sockets, or fastenings required for securing metal work to other structures shall be
furnished to the appropriate trades promptly. Details and specifications of items for which standard products
are available are representative guides of minimum requirements for such items. Standard products, generally
meeting such requirements, will be accepted subject to approval. Welding shall be continuous along entire area
of contact except where tack welding is noted. Tack welding will not be permitted on exposed surfaces. Items
specified to be galvanized shall be hot-dip galvanized after fabrication. Weight of coating shall be not less
than 0.38 kilogram per square meter 1.25 ounces per square foot of surface.
Templates and patterns for proper fitting of hardware and other accessories shall be used wherever practical.
Substitutions of materials or modification of details, or both, shall be made only when warranted and approved.
1.4 QUALIFICATIONS FOR WELDING WORK
[Section
05090S
05090S
05090S WELDING, STRUCTURAL applies to work specified in this section.]
[Welding Procedures shall be in accordance with AWS D1.1/D1.1M. Test specimens shall be made in the presence
of Contracting Officer and shall be tested by an approved testing laboratory at the Contractor's expense.
Certification of Welder Qualifications by tests in accordance with AWS D1.1/D1.1M, or under an equivalent approved
qualification test shall be submitted. In addition, tests shall be performed on test pieces in positions and
with clearances equivalent to those actually encountered. If a test weld fails to meet requirements, an immediate
retest of two test welds shall be made and each test weld shall pass. Failure in the immediate retest will require
that the welder be retested after further practice or training and a complete set of test welds shall be made.]
1.5 DRAINAGE HOLES
Drainage holes shall be drilled to eliminate water traps. Hole locations and diameter of holes shall be 13 millimeter
1/2 inch and shown on detail drawings for Contracting Officer's approval. Hole size and locations shall not
affect structural integrity.
PART 2 PRODUCTS
NOTE: Delete the following metals that are not required for the items specified
in paragraph "Miscellaneous Metal Items." The specified metals are only those
which are common to several miscellaneous metal items. Metals which are required
only for a specific fabricated metal item are specified in the paragraph for
the item.
2.1 STRUCTURAL STEEL PLATES, SHAPES, AND BARS
Plates, shapes, and bars shall conform to ASTM A 36/A 36M.
Plates to be bent or cold formed shall conform to ASTM A 283/A 283M, Grade C.
2.2 STRUCTURAL STEEL TUBING
Square or rectangular tubing shall be hot formed, welded or seamless, conforming to ASTM A 501.
2.3 HOT-ROLLED CARBON STEEL BARS AND BAR SIZE SHAPES
Bars and bar sizes shall conform to ASTM A 575, Grade M1020.
2.4 HOT-ROLLED CARBON STEEL SHEETS AND STRIPS
Sheets and strip shall be uncoated and shall conform to ASTM A 1011/A 1011M.
2.5 COLD-ROLLED CARBON STEEL SHEETS
Sheets shall be uncoated and shall conform to ASTM A 366/A 366M.
2.6 GALVANIZED CARBON STEEL SHEETS
Sheets shall conform to ASTM A 526/A 526M; galvanizing shall conform to ASTM A 525MASTM A 525, G90.
2.7 GRAY IRON CASTINGS
Castings shall conform to ASTM A 48/A 48M, Class 30.
2.8 MALLEABLE IRON CASTINGS
Castings shall conform to ASTM A 47/A 47M, Grade 32510 or Grade 35018.
2.9 RAISED PATTERN STEEL FLOOR PLATES
NOTE: Drawings must indicate the thickness of floor plate.
Plates shall be structural-quality steel having a raised figure pattern at regular intervals on the surface,
and shall be flatback style carbon steel conforming to ASTM A 786/A 786M, except that the steel shall conform
to ASTM A 36/A 36M and pattern shall be No. [1] [2] [3] [4] [5].
2.10 STEEL BAR GRATING
NOTE: Drawings must indicate bearing bar size.
Grating shall conform to NAAMM MBG 531 steel shall conform to ASTM A 36/A 36M and finish shall be shop-applied
paint instead of galvanized. End-banding bars, anchors, and other components shall be provided as required to
suit conditions indicated. Steel grating exposed to the weather shall be galvanized after fabrication.
2.11 ANCHORAGE MATERIALS
NOTE: Concrete inserts shall be used for the fastening of fabricated metal
items to cast-in-place concrete construction when the anchorage device will
be subjected to direct pull-out loadings. Such fabricated metal items include
shelf angles and equipment supports attached to, or suspended from, concrete
slab ceilings.
Threaded-type concrete inserts shall be galvanized ferrous castings having an enlarged base with not less than
two nailing lugs, length not more than thickness of concrete section less 19 millimeter 3/4 inch, and internally
threaded to receive diameter M20 3/4-inch machine bolt. Ferrous castings shall be ferritic malleable iron conforming
to ASTM A 47/A 47M, Grade 32510 or Grade 35018, or may be medium-strength cast steel conforming to ASTM A 27/A 27M
, Grade U-60-30. Inserts shall be galvanized after fabrication in accordance with ASTM A 153/A 153M.
Threaded inserts shall not be removable when embedded in 20 Megapascal 3,000 pounds per square inch (psi) concrete
and subjected to a 44.5 kilonewton 10,000 pound tension load test in an axial direction.
Carbon steel bolts having special wedge-shape heads, nuts, washers, and shims shall be provided. Such hardware
items shall be galvanized in accordance with ASTM A 153/A 153M.
Slotted-type concrete inserts shall be galvanized, pressed steel plate, welded construction, box type with slot
designed to receive diameter M20 3/4-inch square head bolt and to provide lateral adjustment of the bolt. Length
of insert body less anchorage lugs shall be not less than 115 millimeter 4-1/2 inches. Inserts shall be provided
with knockout cover. Steel plate shall be not less than 3 millimeter 1/8 inch thick and shall conform to ASTM A 283/A 283M
, Grade C. Inserts shall be galvanized after fabrication in accordance with ASTM A 153/A 153M.
Slotted inserts shall not be removable when embedded in 20 Megapascal 3,000 psi concrete and subjected to a 27
kilonewton 6,000 pound tension load test in an axial direction.
NOTE: Masonry anchorage devices must be used only for the fastening of fabricated
metal items to solid masonry and concrete-in-place construction when the anchorage
device will not be subjected to direct pull-out loadings nor to vibration.
Masonry anchorage devices are used only for nonvibratory shear loads.
Masonry anchorage devices shall be expansion shields conforming to FS FF-S-325 and ASTM C 514, Group, Type, and
Class as follows:
[Lead expansion shields for machine screws and bolts M6 1/4 inch and smaller shall be head-out embedded-nut
type, single-unit class, conforming to Group I, Type 1, Class 1.]
[Lead expansion shields for machine screws and bolts greater than M6 1/4 inch shall be head-out embedded-nut
type, multiple-unit class, conforming to Group I, Type 1, Class 2.]
[Bolt anchor expansion shields for lag bolts shall be zinc-alloy long-shield anchors class, conforming
to Group II, Type 1, Class 1.]
[Bolt anchor expansion shields for bolts shall be closed-end bottom bearing class, conforming to Group
II, Type 2, Class 1.]
NOTE: Toggle bolts must be used for the fastening of fabricated metal items
to hollow masonry and stud partitions.
Toggle bolts shall be tumble-wing type of the class and style best suited for the work, and shall conform to
FS FF-B-588, Type II.
2.12 FASTENING MATERIALS
Standard bolts shall be regular hexagon head type, low-carbon steel, coarse thread series, conforming toASTM F 568MASTM A 307.
Nuts shall be plain hexagon, regular style, carbon steel, conforming to ASTM A 563MASTM A 563, Grade A.
Lag bolts shall be square head, gimlet point or cone point, carbon steel, conforming toASME B18.2.3.8MASME B18.2.1
.
Machine screws shall be carbon steel, cross-recess drive, [flat-head] [countersunk head], conforming toASME B18.6.7MASME B18.6.3.
Wood screws shall be carbon steel, single thread, flat countersunk head, cross-recess drive, conforming toASME B18.2.3.8MASME B18.2.1.
Plain washers shall be round, general-assembly-grade, carbon steel class, conforming toANSI B18.22MANSI B18.22.1
.
Lockwashers shall be helical spring, carbon steel class, of the style best suited for the work, conforming toASME B18.21.2MASME B18.21.1.
Electrodes for manual shielded metal arc welding shall meet the requirements of AWS D1.1/D1.1M, and shall be
mild steel electrodes conforming to AWS A5.1, E60 series.
2.13 PAINT MATERIALS
Paint for carbon steel shall [conform to
SSPC Paint 20.] [be as specified in Section
09970S
09970S
09970S COATINGS FOR STEEL.]
Primer for carbon steel shall [conform to
SSPC Paint 25.] [be as specified in Section
09970S
09970S
09970S COATINGS FOR STEEL.]
2.14 GENERAL FABRICATION
2.14.1 Workmanship
Fabricated Structural Steel shall be in accordance withASTM E 621 andAISC 317.
Joints shall be milled to a close fit. Corner joints shall be coped or mitered, well-formed, and in true alignment.
Joints exposed to the weather shall be formed and fabricated to exclude water.
Castings shall be sound and free from warp or defects that impair strength and appearance. Exposed surfaces
shall have a smooth finish and sharp, well-defined lines and arrises. Joints shall be milled to a close fit.
2.14.2 Holes for Other Work
Holes shall be provided as indicated for securing items to metal work.
2.14.3 Galvanizing
NOTE: Exterior and interior fabricated metal items of ferrous metals exposed
to dampness or excessive moisture must be galvanized. When a specific fabricated
metal item is required to be galvanized when installed in some interior locations
but not in other interior locations, the items to be galvanized must be indicated.
Fabricated metal items specified to be galvanized shall be covered with a zinc coating applied by the hot-dip
process after fabrication.
Galvanizing of iron and steel hardware shall be in accordance with ASTM A 153/A 153M.
Galvanizing of rolled, pressed, and forged steel shapes, plates, bars, and strip, 6 millimeter 1/8-inch thick
and heavier, shall be in accordance with ASTM A 123/A 123M.
Galvanizing of assembled steel products shall be in accordance with ASTM A 123/A 123M.
2.14.4 Shop Painting
Fabricated metal work, except metal surfaces embedded in concrete or masonry, surfaces and edges to be field
welded, and galvanized surfaces shall be primed in accordance with [
SSPC Paint 25] [Section
09970S
09970S
09970S COATINGS FOR
STEEL.]
2.15 MISCELLANEOUS METAL ITEMS
2.15.1 Access Panels and Frames for Masonry Walls
NOTE: Access panels and frames for plastered stud partitions and acoustical
ceilings are specified in Division 9, "Finishes."
Panels and frames shall be provided at each pipe space and plumbing chase in masonry walls and at other locations
as indicated.
Panels and frames shall be flush panel type for masonry construction, with door size not less than 400 by 500
millimeter 16 inches by 20 inches.
Frames shall be fabricated from 1.6 millimeter 16 gage, cold-rolled carbon steel sheets with exposed flange not
less than 22 millimeter 7/8 inch wide, with welded joints and with anchorage for securing to building construction.
Panels shall be fabricated from 2.0 millimeter 14-gage, cold-rolled carbon steel sheets, with stiffened edges
and with welded attachments. Panels shall be completely assembled with two hinges and one lock per door. Hinges
shall be concealed spring type; locks shall be flush-face, turn-screw-operated latch type. Finish shall be prime
coat of baked enamel.
2.15.2 Cast Abrasive Thresholds
NOTE: Thresholds for aluminum entrances are specified in Section 08120S ALUMINUM
DOORS AND FRAMES. Thresholds for sound retardant doors are specified in Section
08345 SOUND CONTROL DOOR ASSEMBLIES. Extruded aluminum thresholds for doorways
except aluminum entrance and sound-retardant doors are specified in Section
08710S DOOR HARDWARE. Thresholds for elevator hoistway entrances are specified
in Section 14210S ELECTRIC TRACTION ELEVATORS.
Drawings must indicate location, type, pattern, and width of thresholds.
Thresholds shall be gray iron castings with fluted tread and abrasive grit embedded uniformly into the walking
surface at the time of casting. Gray iron castings shall be ASTM Class 20. Abrasive grit shall be No. 20 grain
aluminum oxide or silicon carbide or a combination of both. Screws for securing cast-iron thresholds shall be
zinc- or cadmium-coated.
Thresholds shall be aluminum-alloy sand castings with fluted tread and abrasive grit embedded uniformly into
the walking surface at the time of casting. Aluminum castings shall conform to ASTM B 26/B 26M, Alloy 514.0
or B443.0, Temper F. Abrasive grit shall be 20-grain aluminum oxide. Screws for securing cast aluminum thresholds
shall be made of Type 300 series corrosion-resisting, chromium-nickel steel.
Thresholds shall be of the patterns and widths indicated. Lengths shall be as required to accurately fit each
opening. Metal thickness shall be not less than 10 millimeter 3/8 inch. Thresholds shall be drilled and countersunk
to receive flathead screws spaced not more than 75 millimeter 3 inches from each threshold end and not more than
380 millimeter 15 inches on center; a single row of screw holes for thresholds 130 millimeter 5 inches or less
in width shall be provided; and a double row of screw holes for thresholds greater than 130 millimeter 5 inches
in width, with two screw holes at ends and with staggered intermediate screw holes also shall be provided.
Threshold ends shall be cut to fit door frame jambs. Thresholds for double doors shall be provided with cutouts
to receive bottom bolts.
Thresholds to concrete floor slab shall be secured with lead expansion shields and M6 1/4-inch flathead machine
screws.
2.15.3 Curb Edge Bars
Bars shall be structural steel shapes of sizes indicated, all welded construction, with mitered corners and continuously
welded joints. Anchors welded to curbs shall be provided for embedding in concrete or masonry construction;
they shall be spaced not more than 150 millimeter 6 inches from each curb end and corners and not more than 600
millimeter 24 inches on center. Anchors shall be structural steel bars 19 millimeter 3/4-inch wide by 10 millimeter
3/8-inch thick with length as required for a minimum embedment of 150 millimeter 6 inches in the concrete.
Exterior curb edge bars shall be galvanized. Interior curb edge bars shall be galvanized, where indicated.
2.15.4 Floor Gratings and Frames
NOTE: Steel grating treads and platforms for steel stairs are specified in
paragraph "Steel Stairs."
Gratings shall be carbon steel with parallel bearing bars either right angle or diagonal cross members, conforming
to NAAMM MBG 531. Grating panel sizes and bearing bar sizes shall be as indicated. Each panel shall be provided
with end-banding bars, four saddle clip anchors designed to fit over two bearing bars, and four stud bolts, each
with a plain washer and nut.
Frames shall be structural steel angles, all-welded construction, and fabricated so that the tops of frames and
floor grating finish flush with the finished floor elevation. Anchors welded to the frame shall be provided,
spaced not more than 150 millimeter 6 inches from ends of frame sections, not more than 150 millimeter 6 inches
from corners, and not more than 600 millimeter 24 inches on center between end and corner anchors. Anchors
shall be structural steel bars, 75 millimeter 3/4-inch wide by 10 millimeter 3/8-inch thick with length as required
for a minimum embedment of 6 inches 150 millimeter in the concrete.
Grating panels shall be removable. Stud bolts to receive saddle clip anchors shall be field welded to the frame.
Notching of bearing bars at supports will not be permitted. Openings in the grating shall be provided as indicated.
NOTE: Select one when galvanizing is required, as applicable to the project.
Galvanizing is required for exterior gratings.
Exterior gratings and frames, including fasteners and clips, shall be galvanized. Interior grating and frames,
including fasteners and clips, shall be galvanized where indicated.
2.15.5 Floor Plate Covers and Frames
NOTE: Steel floor plates connected to structural steel work are specified in
Section 05120S STRUCTURAL STEEL. Steel floor plate treads and platforms for
steel stairs are specified in paragraph, "Steel Stairs."
Covers shall be carbon steel plates having a raised figure pattern at regular intervals on the surface, conforming
to ASTM A 786/A 786M and pattern shall be No. [1] [2] [3] [4] [5].
Cover sections shall be the width and thickness indicated. Length shall be limited by total weight not to exceed
45 kilogram 100 pounds. Each floor plate cover section shall be provided with two flush lifting rings, (one
located at each end of the section). Covers shall be free of sharp edges and burrs. Covers shall be provided
with holes to receive flathead machine screws.
Frames shall be structural steel angles and steel bar stops, all-welded construction, and fabricated so that
the tops of frames and floor plate covers finish flush with the finished floor elevation. Anchors welded to
the frame shall be provided, and shall be spaced not more than 150 millimeter 6 inches from ends of frame sections
and corners and not more than 600 millimeter 24 inches on center. Anchors shall be structural steel bars 75
millimeter 3/4-inch wide by 10 millimeter 3/8-inch thick with the length as required for a minimum embedment
of 150 millimeter 6 inches in the concrete. Frames shall be drilled and tapped to receive machine screws.
Plate covers shall be removable and shall be secured to frame with 10 millimeter 3/8-inch machine screws spaced
not more than 75 millimeter 3 inches from each cover end and not more than 300 millimeter 12 inches on center.
Machine screws shall be zinc-or cadmium-coated. Openings in plate covers shall be provided as indicated.
Exterior plates and frames shall be galvanized. Interior plates and frames shall be galvanized where indicated.
2.15.6 Ladders
NOTE: Minimum design requirements for ladders are specified in 29 CFR 1910,
Section 27.
Ladders shall be fixed-rail type, located and detailed as indicated and specified. Rungs shall be 75 millimeter,
3/4-inch, solid-section structural steel rods, spaced 300 millimeter 12 inches on center. Side rails shall
be structural steel flat bars with rounded edges 64 by 13 millimeter spaced 16 inches 400 millimeter 2-1/2 inches
by 1/2 inch apart, and conforming to 29 CFR 1910, Section 27. Rungs shall be fitted into punched holes in the
side rails, welded, and ground smooth. Splices and connections shall have a smooth transition with original
members without projections that are sharp or more extensive than required for joint strength. Ladders shall
be provided with structural steel brackets, drilled to receive anchor bolts, and welded to side rails. Bracket
spacing shall not exceed 3.1 meter 10 feet on center.
Exterior and interior ladders, including brackets and fasteners, shall be galvanized where indicated.
2.15.7 Ladder Safety Cages
NOTE: Minimum design requirements for ladder safety cages are specified in
29 CFR 1910, Section 27.
Cages shall be basket guard hoop type, located and detailed as indicated and specified. Cages shall be fabricated
from structural steel flat bars and assembled by bolting or welding. Top and bottom hoops and intermediate hoops
at intervals of not more than 6.1 meter 20 feet between top and bottom hoops, shall be 100 by 8 millimeter 4
inches by 5/16 inch. Hoops between 100 millimeter 4-inch wide hoops shall be 50 by 8 millimeter 2 inches by
5/16 inch and spaced not more than 1.2 meter 4 feet on center. Vertical bars shall be 50 by 8 millimeter 2 inches
by 5/16 inch and spaced not more than 230 millimeter 9 inches or 40 degrees on center. Hoops shall be fastened
to the steel ladder side rails with M15 1/2-inch steel bolts or be shop welded.
[Exterior] [and] [interior] ladder safety cages, including fasteners, shall be galvanized.
2.15.8 Loose Steel Lintels
NOTE: Delete paragraph heading and following paragraphs when reinforced masonry
or concrete lintels only are required. Lintel types required must be indicated.
Lintels shall be provided for openings and recesses in masonry walls and partitions as indicated.
Lintels shall be structural steel shapes as indicated. Lintels consisting of more than one member shall be welded
together to form one unit. Bearing at each side of openings shall be not less than 150 millimeter 6 inches.
Lintels installed in exterior walls shall be galvanized.
2.15.9 Metal Safety Nosing for Concrete Treads
Nosings shall be provided for interior concrete stair treads and concrete platforms and landings, as indicated.
Nosings shall be nonskid type, [cast iron class, with 6 millimeter 1/4-inch radius nose lip, conforming to FS RR-T-650
, Composition D, Type 5.] [cast aluminum-alloy class, with 6 millimeter 1/4-inch radius nose lip, conforming
to FS RR-T-650 (where abrasive material in top surface is embedded not less then 1.5 millimeter).]
Nosings shall be 100 millimeter wide by 200 millimeter 4-inches wide by 8-inches shorter in length than the width
of concrete tread, platform or landing. Each nosing shall be equipped with integrally cast anchors for embedding
in fresh concrete. Anchors shall be spaced not more than 100 millimeter 4 inches from each nosing end and not
more than 380 millimeter 15 inches on centers.
2.15.10 Miscellaneous Steel Framing and Supports
Miscellaneous steel framing and supports that do not form a part of the structural steel framework shall be provided
to complete the work.
Miscellaneous steel framing and supports shall be fabricated of structural steel plates, shapes, bars, and tubing,
of sizes and arrangement indicated.
Exterior [and interior] fabricated steel framing and supports shall be galvanized as indicated.
2.15.11 Roof Scuttles
Roof scuttles shall be single-leaf type, sized to provide a minimum clear opening of [760 by 900] [30 by 36]
[_____ by _____] millimeter inches.
Steel sheets shall be prime painted, electro-deposited galvanized, hot-rolled carbon steel sheets; covers and
curbs shall be 2.0 millimeter, and 0.85 millimeter 14 gage, and 22 gage for cover liner.
Steel sheets shall be hot-dip-galvanized carbon steel sheets. Sheet equivalent thickness shall be 2.0 millimeter
0.0785 inch (14 galvanized sheet gage) for covers and curbs and 0.85 millimeter 0.0336 inch (22 galvanized sheet
gage) for cover liner.
Cover shall be formed from one piece of the specified steel sheet with 75 millimeter 3-inch hemmed edge and
corners full welded and ground smooth. Cover shall be insulated with either glass fiber or rigid fiberboard
insulation 25 millimeter 1 inch thick. Insulation shall be covered and protected by the specified steel sheet
cover liner.
Curbs shall be made of the specified steel sheet 300 millimeter 12 inches in height, formed with 90 millimeter
3-1/2-inch mounting flange having holes for securing to the roof deck. Curb shall be equipped with an integral
metal cap flashing made of the same metal and gage as the curb, having corners full welded and ground smooth.
Curb shall be insulated on the exterior face with rigid fiberboard insulation 25 millimeter 1 inch thick.
Scuttles shall be completely assembled with heavy pintle hinges, either compression-spring operators enclosed
in telescopic tubes or enclosed torsion-spring operators; they shall have an automatic locking hold-open arm
provided with hand-grip handle, positive snap latch with an operating handle both inside and outside, provisions
for padlocking on the inside, and chloroprene elastomer weatherseal. Hardware shall be zinc- or cadmium-coated.
2.15.12 Safety Chains
Chains, complete with snap fasteners on each end and eye bolts for attachment of chains, shall be provided for
each guarded opening where indicated.
Chains shall be galvanized, welded type, proof coil steel chain, 5 millimeter 3/16-inch nominal size, with at
least 33 links per meter 10 links per foot, proof loading not less than 4,500 newton 1,000 pounds, zinc-coated,
conforming to ASTM A 467/A 467M.
Snap fasteners shall be boat type with strength equivalent to the chain proof loading. Eye bolts for attachment
of chains shall be M10 3/8-inch bolt with 19 millimeter 3/4-inch eye diameter and shall have strength equal to
the chain proof loading. Safety fasteners and eye bolts shall be galvanized.
Two chains 150 millimeter 6 inches longer than the anchorage spacing shall be provided for each guarded opening.
Top chain shall be mounted not less than 1 meter 3 feet 6 inches above the floor and the second chain shall be
mounted 0.6 meter 2 feet above the floor.
2.15.13 Shelf Angles
NOTE: Shelf angles connected to structural steel work are specified in Section
05120S STRUCTURAL STEEL.
Angles attached to concrete framing shall be structural steel angles of the sizes indicated. Angles shall be
provided with slotted holes to receive M20 3/4-inch bolts, spaced not more than 150 millimeter 6 inches from
each shelf angle end and not more than 600 millimeter 24 inches on center.
Angles to be installed in exterior walls shall be galvanized.
Wedge-type concrete inserts, complete with fasteners, shall be provided for the attachment of shelf angles to
cast-in-place concrete.
2.15.14 Steel Pipe Railings
NOTE: Nonferrous pipe railings and ornamental railings are specified in Section
05700S ORNAMENTAL METAL. Design requirements for railings are specified in
29 CFR 1910, Section 23.
Steel pipe railings shall include guarding at open-sided areas consisting of top rail, intermediate rail and
posts, and handrails at walls, as indicated.
Minimum railings shall be 38 millimeter 1-1/2-inch nominal size and standard weight, conforming to ASTM A 500
, Grade B, ASTM A 501; or may be 38 millimeter 1-1/2-inch nominal size, 4.1 kilogram per meter 2.72 pounds weight
per foot round structural-steel tubing.
Joining of post, rails, and corners shall be made by one of the following methods:
Flush-type steel railing fittings, welded and ground smooth, with railing splice locks secured with M10
3/8-inch hexagonal recessed-head setscrews.
Mitered and welded joints made by fitting post to top rail and intermediate rail to post, mitering corners,
groove welding joints, and grinding smooth. Railing splices shall be butted and reinforced by a tight-fitting
interior sleeve not less than 150 millimeter 6 inches long.
Railings may be bent at corners instead of joining, provided the bends are made in suitable jigs and
that the cylindrical cross section of the pipe is maintained throughout the entire bend.
Removable railing sections shall be provided as indicated.
Kickplates shall be provided between railing posts where indicated. Kickplates shall be steel flat bars 6 millimeter
1/4-inch thick by not less than 150 millimeter 6 inches high. Kickplates shall be secured as indicated.
Exterior and interior railings, including pipe, fittings, brackets, fasteners and other ferrous metal components
where indicated shall be galvanized; interior railings not indicated galvanized shall be black.
2.15.15 Steel Stairs
NOTE: When Section 05510S METAL STAIRS is used edit out 2.15.15 through 2.15.15.8.
Steel stairs shall be of the type, arrangement, and design to conform to Class
A, "Interior Stairs and Smokeproof Towers," sections 5.2.2 And 5.2.3, National
Fire Protection Association "Code for Safety to Life from Fire in Buildings
and Structures," NFPA 101. Where applicable 29 CFR 1910, Section 24 shall also
be followed.
Steel stairs shall be constructed to conform to the sizes and arrangements indicated. Steel framing, hangers,
columns, struts, clips, brackets, bearing plates, and other components shall be provided as required for the
support of stairs and platforms.
2.15.15.1 Stair Framing
Stringers shall be structural steel channels or structural steel plates or a combination thereof, as indicated.
Exposed ends of stringers shall be closed.
Platform of structural steel channel headers and miscellaneous framing members shall be constructed as indicated.
Headers shall be bolted to stringers and newels. Framing members shall be bolted to stringers and headers.
2.15.15.2 Metal Pan Risers, Subtreads, and Subplatforms
Metal pans shall be formed from 2.8 millimeter 12-gage structural steel sheets and shall be made to receive cement
fill. Structural steel sheets shall be uncoated, hot-rolled, carbon steel of structural quality having a minimum
yield point of 275.8 Megapascal 40,000 psi and shall conform to ASTM A 570/A 570M, Grade 40.
Metal pans shall be formed from 2.8 millimeter 12-gage structural steel sheets, galvanized, and shall be made
to receive cement fill. Galvanized structural steel sheets shall be hot-dip galvanized, carbon steel structural
quality having a minimum yield point of 227.5 Megapascal 33,000 psi and shall conform to ASTM A 446/A 446M, Grade
A, with zinc coating conforming toASTM A 525MASTM A 525, G90.
Riser and subtread metal pans shall be formed with nosing and sanitary cove as indicated. Tread and riser supporting
brackets shall be structural steel angles, of size indicated, welded to stringers. Metal pans shall be secured
to brackets with rivets or with welds.
Subplatform metal pans shall be secured to platform framing members with welds.
Metal safety nosings shall be nonskid type, cast aluminum-alloy class with 9 millimeter 3/8-inch radius nose
lip, conforming to FS RR-T-650. Nosings shall be 100 millimeter 4-inches wide by length of tread and landing
as applicable. Each nosing shall be equipped with integrally cast anchors for embedding in fresh cement fill.
Anchors shall be spaced not more than 100 millimeter from each nosing end and not more than 15 inches 380 millimeter
on center.
2.15.15.3 Steel Floor Plate Treads
Steel floor plate shall be carbon steel plate having raised figure at regular intervals on the surface conforming
to ASTM A 786/A 786M, and pattern shall be No. [1] [2] [3] [4] [5].
Treads shall be formed of 6 millimeter 1/4-inch thick steel floor plate with nosing and back resistance welded
carbon steel mechanical tubing conforming to ASTM A 513, of size indicated, welded to stringers. Treads shall
be secured to brackets with welds.
Platforms shall be steel floor plate of the thickness indicated. Nosing matching that on steel floor plate treads
shall be provided at landings.
2.15.15.4 Floor Grating Treads and Platforms
Floor grating shall be carbon steel, all-welded, parallel bearing bars with right-angle cross members, conforming
to NAAMM MBG 531.
Grating treads shall be open riser type, fabricated from floor grating having the bearing bar size indicated,
with steel floor plate nosing on front edge and with steel angle or steel plate carrier at each end for string
connections. Treads shall be secured to stringers with bolts.
Platforms shall be fabricated from floor grating having the bearing bar size indicated. Nosing matching that
on grating treads shall be provided at all landings. Open-sided edges of floor grating platforms shall be provided
with toe plates, and all other edges shall be provided with end-banding bars. Grating shall be secured to platform
framing members as indicated.
2.15.15.5 Stair Railings and Handrails
[Newels shall be fabricated from steel tubing of wall thickness and shape indicated, with gray iron casting caps.
Steel tubing shall be electric-resistance-welded carbon steel mechanical tubing conforming to ASTM A 513, or
it may be cold-formed welded or seamless structural steel tubing conforming to ASTM A 500, Grade A, B, or C;
or ASTM A 53/A 53M, Type E or S, Grade B. Remainder of stair railings and handrails at walls shall be steel
pipe railings as specified.]
[Stair railings and handrails at walls shall be steel pipe railings as specified.]
2.15.15.6 Soffit Clips
Stair treads and platforms shall be provided with soffit clips having holes for attaching metal furring for plastered
soffits. Clips shall be spaced not more than 300 millimeter 12 inches on center.
2.15.15.7 Exterior Stairs
Exterior stairs, including platforms, railings, and other ferrous metal components shall be galvanized.
2.15.15.8 Workmanship
Welding shall be used for joining pieces together. Bolts or similar fastenings shall not appear on finish surfaces.
Joints shall be true and tight and connections between parts lightproof tight. Welds shall be continuous and
ground smooth.
Stair work shall be erected to line, plumb, square, true, and level. Runs shall register level with floor and
platform levels.
2.16 STEEL DOOR FRAMES
NOTE: Structural steel door frames connected to structural steel work are specified
in Section 05120S STRUCTURAL STEEL. Structural steel frames for UL-labeled
openings are specified with the fire door in Division 8, "Doors and Windows."
Pressed steel door frames are specified in Section 08110S STEEL DOORS AND FRAMES.
Steel door frames shall be made of steel shapes of the sizes and weights indicated. Frames shall be fabricated
by welding and shall be uniform, square and true. Built-up members shall be plug welded; exposed joints shall
be continuously welded, with welds ground smooth. Steel bar stops shall be 38 by 16 millimeter 1-1/2 inches
by 5/8 inch and shall be plug welded to frames except where stops are indicated to be removable. Removable stops
shall be secured to frame with machine screws, uniformly spaced not more than 250 millimeter 10 inches on center.
Any necessary reinforcement shall be made and the frames shall be drilled and tapped as required for finish hardware.
Anchors shall be provided for securing door frames into adjoining concrete or masonry. Anchors shall be structural
steel bars 3 by 50 millimeter 1/8 inch by 2 inches by length as required for a minimum embedment of 100 millimeter
4 inches in the concrete or masonry. Anchors shall be welded to frames. Anchors shall be located on jambs
not more than 300 millimeter 12 inches from both the bottom and head of frame and at uniformly spaced intermediate
intervals not exceeding 750 millimeter 30 inches on center between anchors.
Exterior [and interior] steel door frames shall be galvanized where indicated.
2.17 WHEEL GUARDS
Guards shall be gray iron castings, hollow-core type, of the shape indicated, with wall thickness not less than
19 millimeter, 3/4 inch, with holes for M24 7/8-inch diameter countersunk anchor bolts, and with grout holes.
2.18 WIRE MESH PARTITIONS
NOTE: If Section 10600S PARTITIONS is used, edit out all of 2.18 through 2.19.
Wire mesh partition height, type and size of doors, and size of service windows,
if required, must be indicated on the drawings.
Partition panels shall be 1.5 meter 5-feet wide by the height indicated, fabricated of steel wire mesh securely
clinched into the panel frames. Frames shall be fabricated of steel channels with corners mortised and tenoned
and with vertical members having 6 millimeter 1/4-inch diameter holes spaced not more than 300 millimeter 12
inches on center for bolting to adjacent panels. Horizontal reinforcement shall be one steel channel with the
wire mesh woven through the reinforcement channel, or it may be two steel channels, one on each side of the wire
mesh and riveted together. Horizontal reinforcement shall be tenoned to the panel frame vertical members and
shall be located approximately 1050 millimeter 42 inches above the bottom of the panel. Size of partition panel
components shall be as follows:
Wire mesh shall be [3.5 millimeter 10-gage (0.135-inch) steel wire woven into 38 millimeter 1-1/2-inch
diamond mesh.] [4.9 millimeter 6-gage (0.192-inch) steel wire woven into 50 millimeter 2-inch diamond
mesh.]
Frame horizontal members shall be [25 by 13] [38 by 19] by 3.2 millimeter [1- by 1/2-] [1-1/2- by 3/4-]
by 1/8-inch hot-rolled carbon steel channels.
Horizontal reinforcement shall be [one 25 by 13] [two 25 by 19] [38 by 19] by 3.2 millimeter [one 1-
by 1/2-] [two 1- by 3/4-] [1-1/2- by 3/4-] by 1/8-inch hot-rolled carbon steel channels.
Frame vertical members shall be the same as horizontal members or may be 32 by 16 millimeter 1-1/4- by
5/8-inch cold-formed C-channels fabricated from 3.1 millimeter 11-gage (0.120-inch) cold-rolled carbon
steel sheets.
Measurements shall be made at the building for final location of pipes, ducts, electrical conduit, and other
items that will pass through wire mesh partitions. At such locations, openings shall be framed using the same
size steel channels as those specified for the partition panels.
Bolts, hardware, accessories, field bracing, and other components shall be provided as required for a complete
installation.
2.18.1 Vertical Reinforcement
NOTE: Vertical reinforcement is required for standard partitions 3 meter 10
feet or more in height and for all heavy duty partitions.
Vertical reinforcement shall be provided between partition panels. Vertical reinforcement shall be hot-rolled
carbon steel flat bars. Bars shall be provided with bolt holes to match those in partition panels and shall
be of the following sizes:
NOTE: Delete following paragraphs when standard partitions (38 millimeter 1-1/2-inch
diamond mesh) having vertical reinforcement are not required.
[8 by 45 millimeter 5/16-inch by 1-3/4-inches for partitions not exceeding 4.3 meter 14 feet in height]
[8 by 64 millimeter 5/16-inch by 2-1/2-inches for partitions over 4.3 meter 14 feet not exceeding 5.2
meter 17 feet in height]
[8 by 45 millimeter 5/16-inch by 3-inches for partitions over 5.2 meter 17 feet not exceeding 6.1 meter
20 feet in height]
NOTE: Delete following paragraphs when heavy duty partitions (50 millimeter
2-inch diamond mesh) are not required.
[8 by 64 millimeter 5/16-inch by 2-1/2-inches for partitions over 2.1 meter 7 feet not exceeding 3.7
meter 12 feet in height]
[8 by 75 millimeter 5/16-inch by 3-inches for partitions over 3.7 meter 12 feet not exceeding 4.9 meter
16 feet in height]
[8 by 89 millimeter 5/16-inch by 3-1/2 inches for partitions over 4.9 meter 16 feet not exceeding 6.1
meter 20 feet in height]
2.18.2 Top Capping
NOTE: Top capping bar is required for partitions 6 meter 20 feet or more in
length.
Top capping bar shall be provided for wire mesh partitions. Top capping shall be provided with 6 millimeter
1/4-inch diameter holes spaced not more than 600 millimeter 24 inches on center for U-bolting to the partition
panels, and shall be [ 57 by 25 by 3 millimeter2-1/4- by 1- by 1/8-inch hot-rolled carbon steel channel for use
with 38 millimeter 1-1/2-inch diamond mesh.] [75 millimeter 3-inch structural steel channel weighing 6.1 kilogram
per meter 4.1 pounds per foot for use with 50 millimeter 2 inch diamond mesh.]
2.18.3 Corner Posts
NOTE: Corner posts may be steel pipe or structural steel tubing or structural
steel I-beams instead of steel angles
Corner posts shall be provided at wire mesh partition corners. Posts shall be provided with bolt holes to match
those in partition panels and shall be [ 32 by 32 by 3 millimeter1-1/4- by 1-1/4- by 1/8-inch hot-rolled carbon
steel angles for 38 millimeter 1-1/2-inch diamond mesh.] [ 45 by 45 by 3 millimeter1-3/4- by 1-3/4- by 1/8-inch
hot-rolled carbon steel angles for 50 millimeter 2-inch diamond mesh.]
2.18.4 Swing Doors
Door construction shall match that of partition panels. Door frames shall be covered on four sides with hot-rolled
carbon steel flat bar the same width as the frame and 3 millimeter 1/8-inch thick. Each swing door shall be
provided with one and one-half pairs of butts riveted to both the door frame and jamb.
2.18.5 Sliding Doors
Sliding doors shall be the size indicated. Door construction shall be the same as that specified for partition
panels. Door frames shall be covered on four sides with hot-rolled carbon steel flat bar the same width as the
frame and 3 millimeter 1/8-inch thick. Each sliding door shall be provided with two [two] [four] -wheel roller
bearing hangers traveling in an enclosed track, with a bottom guide rail.
2.18.6 Door Hardware
Bronze mortise lock capable of receiving the Lock Cylinder without modification. Lock shall be key-operated
on the outside and recessed turn-knob-operated on the inside.
2.18.7 Service Windows
Service windows shall be provided where indicated. Windows shall be slide-up type with shelf. Window openings
shall be 600 millimeter 24 inchesnominal width by 380 millimeter 15-inches nominal height. Window frame and
wire mesh shall be the same as that specified for the partition panels. Shelf shall be 600 millimeter 24 inches
nominal width by 300 millimeter 12 inches in depth and shall be formed from 12-gage, 2.8 millimeter hot-rolled
carbon steel sheet. Windows shall be provided with spring catches that lock window in the open or closed position.
2.19 WIRE MESH WINDOW GUARDS
Guards shall be fabricated from 3.5 millimeter 10-gage (0.135-inch)steel wire woven into 38 millimeter 1-1/2-inch
diamond mesh clinched into the frame. Frame shall be fabricated from 25 by 13 by 3 millimeter 1- by 1/2- by
1/8-inch hot-rolled carbon steel channels with corners mitered and welded. Window guards 1.5 meter 5 feet and
over in height shall be provided with center horizontal reinforcement consisting of two 25 by 10 by 3 millimeter
1-by 3/8-by 1/8-inchhot-rolled carbon steel channels, one on each side of the wire mesh riveted together. Horizontal
reinforcement shall be welded to the frame vertical members.
Subframes shall be 32 by 32 by 3 millimeter 1-1/4- by 1-1/4- by 1/8-inch hot-rolled carbon steel angles with
6 millimeter 1/4-inch diameter holes spaced not more than 300 millimeter 12 inches on center for bolting to the
building construction.
Each window guard shall be provided with one pair of tamperproof hinges for window guards 1.5 meter 5 feet and
less in height and one additional hinge for each 0.9 meter 3-foot increase, or fraction thereof, in height over
1.5 meter 5 feet. One tamperproof padlock hasp shall be provided with each hinge used.
Window guards, subframes, hardware, and fasteners shall be galvanized.
PART 3 EXECUTION
3.1 GENERAL
Fabricated metal work shall be installed in accordance with the approved detail drawings and descriptive data
for each item of fabricated metal, and as specified.
Fabricated metal items shall be securely fastened plumb and true to lines and levels.
3.2 ANCHORAGE DEVICES EMBEDDED IN OTHER CONSTRUCTION
Anchorage devices, such as concrete inserts, anchor bolts, and fabricated metal items having integral anchors,
which are to be embedded in cast-in-place concrete and masonry construction, shall be delivered in time to be
installed before the start of cast-in-place concrete operations and masonry work.
Setting drawings, templates, instructions, and directions shall be provided for the installation of the anchorage
devices.
3.3 FASTENING TO CONSTRUCTION-IN-PLACE
Anchorage devices and fasteners shall be provided where necessary for fastening fabricated metal items to construction-in-place.
Fastening shall include threaded fasteners for concrete inserts embedded in cast-in-place concrete; masonry anchorage
devices and threaded fasteners for solid masonry and concrete-in-place; toggle bolts for hollow masonry and stud
partitions; through bolting for masonry and wood construction; lag bolts and wood screws for wood construction;
and connections for structural steel. Fastening shall be provided as indicated and as specified. Fastening to
wood plugs in masonry or concrete-in-place will not be permitted.
3.4 CUTTING AND FITTING
Cutting, drilling, and fitting required shall be performed for the installation of fabricated metal work. Cutting,
drilling, and fitting shall be executed carefully; when required, work shall be fitted in place before fastening.
3.5 SETTING MASONRY ANCHORAGE DEVICES
Masonry anchorage devices shall be set in masonry or concrete-in-place construction in accordance with the anchorage
device manufacturer's printed instructions. Holes shall be of the recommended depth and diameter and shall be
drilled as recommended by the manufacturer of the particular anchorage device used. Drilled holes shall be left
rough, not reamed, and free of drill dust.
3.6 FIELD WELDING
Procedures for manual shielded metal arc welding, the appearance and quality of welds made, and the methods used
in correcting welding work shall conform to AWS D1.1/D1.1M, "Workmanship" and "Technique."
Welding shall be continuous along the entire area of contact except where tack welding is permitted. [Exposed
connection of fabricated metal work in place shall not be permitted.] [Exposed connection of fabricated metal
work in place shall not be tack welded.] Exposed welds shall be ground smooth.
3.7 THREADED CONNECTIONS
Where exposed to view, bolt and screw heads shall be flat and countersunk, unless otherwise specified. Threaded
connections shall be made up tightly so that the threads will be entirely concealed by fitting.
3.8 STEEL PIPE RAILINGS
Railings shall be adjusted prior to securing in place to ensure proper matching at butting joints and correct
alignment throughout their length. Posts shall be spaced not more than 1.8 meter 6 feet on center and shall be
plumb in each direction. Posts and rail ends shall be secured to building construction as follows:
Concrete anchorage for posts shall be by means of pipe sleeves set and anchored into the concrete. Sleeves
shall be galvanized, standard weight steel pipe not less than 150 millimeter 6 inches long and have an
inside diameter not less than 13 millimeter 1/2 inch greater than the outside diameter of the inserted
pipe post. Steel plate closure shall be provided, secured to the bottom of the sleeve, and shall be
of width and length not less than 25 millimeter 1 inch greater than the outside diameter of the sleeve.
After posts have been inserted into sleeves, the annular space between post and sleeve shall be filled
solid with molten lead, sulfur, or a quick-setting hydraulic cement. Anchorage joint shall be covered
with a steel round flange welded to the post.
Steel anchorage for posts shall be made by means of steel oval flanges, angle or floor type required
by conditions, welded to posts and bolted to the structural steel supporting members.
Concrete and masonry anchorage for rail ends shall be by means of steel round flanges welded to rail
ends and anchored into the wall construction with lead expansion shields and bolts.
Steel anchorage for rail ends shall be by means of steel oval or round flanges welded to rail ends and
bolted to the structural steel members.
Handrails shall be secured to walls by means of wall brackets and wall return fitting at handrail ends. Brackets
shall be malleable iron castings with not less than an 75 millimeter 3-inch projection from the finished wall
surface to the center of the pipe handrail and with the wall plate portion of the bracket drilled to receive
one M10 3/8-inch bolt. Brackets shall be located not more than 1525 millimeter 60 inches on center. Wall return
fittings shall be cast-iron castings, flush-type, with the same projection as that specified for wall brackets.
Wall brackets and wall return fittings shall be secured to building construction as follows:
Concrete and solid masonry anchorage shall be by means of bolt anchor expansion shields and lag bolts.
Hollow masonry and stud partition anchorage shall be by means of toggle bolts having square heads.
3.9 STRUCTURAL STEEL DOOR FRAMES
Bottom of frames shall extend below the finish floor elevation and shall be secured to the concrete slab by means
of steel angle clips and expansion shields and bolts. Angle clips shall be welded to frames.
3.10 WHEEL GUARDS
Guard shall be anchored to concrete or masonry construction in accordance with the manufacturer's instructions.
Hollow cores shall be filled with air-entrained portland cement concrete having a 28-day compressive strength
of not less than 20 Megapascal 3,000 psi, maximum coarse aggregate size of 19 millimeter 3/4 inch. Packaged
concrete materials shall conform to ASTM C 387for normal strength air-entrained concrete. Water shall be potable.
Concrete mixing shall be done in a batch-type mechanical mixer equipped with a suitable charging hopper, water
storage tank, and water-measuring device. Mixer shall be capable of mixing the concrete ingredients into a uniform
mass within the specified mixing time and of discharging the mix without segregation. Each batch of 1.53 cubic
meter 2 cubic yards or less shall be mixed for not less than 1-1/2 minutes; the mixing time shall be increased
15 seconds for each additional cubic .75 meter yard or fraction thereof. Concrete shall be handled from the
mixer to the location of final deposits as rapidly as practical by methods that will prevent segregation and
loss of concrete mix materials. Concrete shall be deposited continuously.
3.11 WIRE MESH WINDOW GUARDS
NOTE: If Section 10600S PARTITIONS is used, edit out 3.11.
Guards shall be mounted on the exterior of the window frame. Subframes shall be anchored to concrete jambs and
solid masonry jambs with lead expansion shields and bolts, to wood jambs with lag bolts. Hinges and padlock
hasps shall be welded to the subframes and window guard frames. Padlock hasps shall be accessible from the interior
and shall be installed on the jamb opposite the hinged jamb.
3.12 COUNTER SHUTTER
Rolling counter shutter with integral frame curtain shall consist of interlocking slats of 1.3 millimeter 0.050-inch
thick anodized aluminum, with a tubular aluminum bottom bar with concealed slide bolts and vinyl astragal.
Integral frame unit shall be extruded aluminum of 6063 alloy. Hood shall be aluminum not less than 1.0 millimeter
0.040-inch thick. Rolling counter door shall be manually operated with a helical torsion spring counterbalance
having a 25 percent safety factor. A key lock shall be provided in sill.
3.13 TOUCHUP PAINTING
NOTE: When abrasive blasting with silica sand is performed, protective equipment
required by NIOSH (National Institute for Occupational Safety and Health) must
be used, to assure safety.
The only respirator suitable for use when using silica sand is Type CE, pressure-demand,
abrasive blast supplied air respirator, with a protection factor of 2000.
When silica sand is not used as the blasting agent, and when a protection factor
of 25 (loose fit hood/helmet) will provide adequate protection than Type CE,
continuous flow, abrasive blast supplied air respirator shall be used.
After installation of fabricated metal work, the Contractor shall touch up field welds, field bolt heads and
nuts, screw heads, damaged galvanized steel, and scarred surfaces on fabricated metal work and on adjacent ferrous
metal surfaces. Touchup and repair shall be accomplished as soon as possible after the damage or installation
has occurred. Surfaces shall be degreased, as required, prior to subsequent surface preparation. Degreasing
shall be accomplished by steam cleaning or washing with a solution of trisodium phosphate in water followed by
a fresh water rinse. Cuts, welds, and large damaged areas shall be sandblasted to near white
SSPC SP 10. Blasting
abrasive shall be sharp silica sand, size 16 to 35 mesh. When sandblasting is prohibited or impractical, mechanical
cleaning by needle gun or abrasive disks or wheels shall be used. Minor abrasions and scars where extensive
rusting has not occurred shall be rendered clean and dry and touched up without further surface preparation.
Repair coating shall be applied within 6 hours after surface preparation or before rusting or re-contamination
occurs. Touchup and repair material shall be the same inorganic zinc coating as applied in the shop. Application
shall be by airless or conventional spray. Compressed air used for blasting and coating shall be free of moisture
and oil. Manufacturer's recommended procedures shall be followed and the requirements of Section
09970S
09970S
09970S COATINGS
FOR STEEL shall apply.
3.14 RAISED PATTERN FLOOR PLATES
NOTE: Raised pattern steel floor plates must not be used in wet or oily areas.
Floor plates, except floor plates indicated as removable, shall be welded to supporting members. Removable plates
shall be fabricated to sizes indicated and secured with flush countersunk bolts. Joints in plates shall occur
only over supports. Openings in flooring shall be provided as indicated.
3.15 STEEL BAR GRATING
Panels, except panels indicated as removable, shall be welded to supporting members. Removable panels shall
be fabricated to sizes indicated and secured with stud bolt anchors welded to supporting member. Anchors shall
be designed to fit over two bearing bars, and four anchors shall be provided for each removable panel. Joints
in panels shall occur only over supports. Notching of bearing bars at supports to maintain elevations will not
be permitted. Openings in flooring shall be provided as indicated.
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