USACE / NAVFAC / AFCESA / NASA UFGS-05 50 13 (August 2008)
---------------------------
Preparing Activity: NAVFAC Superseding
UFGS-05 50 00 (April 2006)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 05 50 13
MISCELLANEOUS METAL FABRICATIONS
08/08
NOTE: This guide specification covers requirements for miscellaneous metalwork.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestion on this specification are welcome and should be directed
to the technical proponent of the specification. A listing of the technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
NOTE: Units of work normally included in this section should be metal items
which require specific fabrication to meet the desired project requirements.
The Key Word Index of the CSI "Masterformat" should be consulted for the proper
location of most items. Loose items fabricated from structural shapes and not
directly attached to major structural steel items may be included in this section,
especially when a structural steel section is not included.
NOTE: Show the following information on the drawings:
1. Location and configuration of all metalwork.
2. All sizes and dimensions.
3. Special fastenings, attachments or anchoring.
4. Location and size of expansion shields larger than 10 mm 3/8 inch in diameter.
5. Location of products to be galvanized.
6. Location and special details of expansion joint covers.
7. Connection details, other than manufacturer's standard, of grating.
8. Location and details of all structural steel door frames.
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.
[ALUMINUM ASSOCIATION (AA)AA 46(1978) Standards for Anodized Architectural AluminumAA DAF-45(2003) Designation System for Aluminum Finishes][AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)AISC 303(2005) Code of Standard Practice for Steel Buildings and Bridges][AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)ASCE 7(2005; Supp 1) Minimum Design Loads for Buildings and Other Structures][AMERICAN SOCIETY OF SAFETY ENGINEERS (ASSE/SAFE)ASSE/SAFE A10.3(2006) Operations - Safety Requirements for Powder Actuated Fastening Systems][AMERICAN WELDING SOCIETY (AWS)AWS D1.1/D1.1M(2008) Structural Welding Code - Steel][ASME INTERNATIONAL (ASME)ASME B18.2.1(1996; Addenda A 1999; Errata 2003; R 2005) Square and Hex Bolts and Screws (Inch Series)ASME B18.2.2(1987; R 2005) Standard for Square and Hex NutsASME B18.21.1(1999; R 2005) Lock Washers (Inch Series)ASME B18.21.2M(1999; R 2005) Lock Washers (Metric Series)ASME B18.22.1(1965; R 2008) Plain WashersASME B18.22M(1981; R 2005) Metric Plain WashersASME B18.6.2(1998; R 2005) Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws: Inch SeriesASME B18.6.3(2003; R 2008) Machine Screws and Machine Screw Nuts][ASTM INTERNATIONAL (ASTM)ASTM A 123/A 123M(2008) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel ProductsASTM A 153/A 153M(2005) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel HardwareASTM A 283/A 283M(2003; R 2007) Standard Specification for Low and Intermediate Tensile Strength Carbon Steel PlatesASTM A 307(2007b) Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile StrengthASTM A 36/A 36M(2008) Standard Specification for Carbon Structural SteelASTM A 467/A 467M(2007) Standard Specification for Machine Coil and ChainASTM A 47/A 47M(1999; R 2004) Standard Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip ProcessASTM A 475(2003) Standard Specification for Zinc-Coated Steel Wire StrandASTM A 48/A 48M(2003; R 2008) Standard Specification for Gray Iron CastingsASTM A 500/A 500M(2007) Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and ShapesASTM A 53/A 53M(2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessASTM A 653/A 653M(2008) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip ProcessASTM A 687(1993) Standard Specification for High-Strength Nonheaded Steel Bolts and StudsASTM A 780(2001; R 2006) Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized CoatingsASTM A 786/A 786M(2005) Standard Specification for Hot-Rolled Carbon, Low-Alloy, High-Strength Low-Alloy, and Alloy Steel Floor PlatesASTM A 924/A 924M(2008a) Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip ProcessASTM B 108/B 108M(2008) Standard Specification for Aluminum-Alloy Permanent Mold CastingsASTM B 209(2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and PlateASTM B 209M(2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)ASTM B 221(2008) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and TubesASTM B 221M(2007) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)ASTM B 26/B 26M(2005) Standard Specification for Aluminum-Alloy Sand CastingsASTM D 1187(1997; R 2002e1) Asphalt-Base Emulsions for Use as Protective Coatings for MetalASTM D 2047(2004) Static Coefficient of Friction of Polish-Coated Floor Surfaces as Measured by the James MachineASTM E 488(1996; R 2003) Standard Test Methods for Strength of Anchors in Concrete and Masonry ElementsASTM F 1267(2007) Metal, Expanded, SteelASTM F 1679(2004e1) Standard Test Method for Using a Variable Incidence Tribometer][MASTER PAINTERS INSTITUTE (MPI)MPI 79(Jan 2004) Alkyd Anti-Corrosive Metal Primer][NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS (NAAMM)NAAMM MBG 531(2000) Metal Bar Grating ManualNAAMM MBG 532(2000) Heavy Duty Metal Bar Grating Manual][NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 211(2006) Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances][THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)SSPC SP 3(2004; E 2004) Power Tool CleaningSSPC SP 6(7) Commercial Blast Cleaning]1.2 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 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 information only.][for Contractor Quality Control approval.] 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 01 33 00 SUBMITTAL PROCEDURES:
SD-02 Shop Drawings
Fabrication drawings of structural steel door frames[; G][; G, [_____]]
Access doors and panels, installation drawings[; G][; G, [_____]]
Cover plates and frames, installation drawings[; G][; G, [_____]]
Expansion joint covers, installation drawings[; G][; G, [_____]]
Floor gratings and roof walkways, installation drawings[; G][; G, [_____]]
Wheel guards, installation drawings[; G][; G, [_____]]
Window[and door] guards, installation drawings[; G][; G, [_____]]
Embedded angles and plates, installation drawings[; G][; G, [_____]]
Roof hatch[; G][; G, [_____]]
Submit fabrication drawings showing layout(s), connections to structural system, and anchoring
details as specified in AISC 303.
Submit templates, erection and installation drawings indicating thickness, type, grade, class
of metal, and dimensions. Show construction details, reinforcement, anchorage, and installation
with relation to the building construction.
SD-03 Product Data
Access doors and panels
Cover plates and frames
Control-joint covers
Expansion joint covers
Floor gratings and roof walkways
Structural steel door frames
Wheel guards
Window[and door] guards
Roof hatch
SD-04 Samples
Expansion joint covers
Control-joint covers
Provide full size samples , taken from manufacturer's stock, and be complete as required for
installation in the structure. Samples may be installed in the work, provided each sample is
clearly identified and its location recorded.
1.3 QUALIFICATION OF WELDERS
NOTE: For jobs in Iceland, in lieu of AWS welders and inspectors, use "Technological
Institute of Iceland" certified welders and inspectors.
Qualify welders in accordance with AWS D1.1/D1.1M. Use procedures, materials, and equipment of the type required
for the work.
1.4 DELIVERY, STORAGE, AND PROTECTION
Protect from corrosion, deformation, and other types of damage. Store items in an enclosed area free from contact
with soil and weather. Remove and replace damaged items with new items.
PART 2 PRODUCTS
NOTE: Product selections should be based on esthetic values, reliability and
cost. Delete alternate requirements where they occur.
2.1 MATERIALS
2.1.1 Structural Carbon Steel
ASTM A 36/A 36M.
2.1.2 Structural Tubing
ASTM A 500/A 500M.
2.1.3 Steel Pipe
ASTM A 53/A 53M, Type E or S, Grade B.
2.1.4 Fittings for Steel Pipe
Standard malleable iron fittings ASTM A 47/A 47M.
2.1.5 Gratings
a. Gray cast iron ASTM A 48/A 48M, Class 40.
b. Metal plank grating, non-slip requirement, aluminum ASTM B 209M ASTM B 209, 6061-T6; steel
ASTM A 653/A 653M, Z275 G90.
c. Metal bar type grating NAAMM MBG 531[NAAMM MBG 532].
NOTE: Use NAAM MBG 531 for gratings for pedestrian grates and use NAAM MBG 532
for vehicular grates not specified elsewhere.
2.1.6 Floor Plates, Patterned
Floor plate ASTM A 786/A 786M. Steel plate shall not be less than 1.9 mm 14 gage.
2.1.7 Anchor Bolts
ASTM A 307. Where exposed, shall be of the same material, color, and finish as the metal to which applied.
2.1.7.1 [Expansion Anchors] [Sleeve Anchors] [Adhesive Anchors]
Provide [_____]mm [_____]in. diameter [expansion anchors][sleeve anchors][adhesive anchors]. Minimum [concrete][masonry]
embedment shall be [_____]mm [_____]in. Design values listed shall be as tested according to ASTM E 488.
a. Minimum [ultimate][allowable] pullout value shall be [_____]kN [_____]lb.
b. Minimum [ultimate][allowable] shear value shall be [_____]kN [_____]lb.
2.1.7.2 Lag Screws and Bolts
ASME B18.2.1, type and grade best suited for the purpose.
2.1.7.3 Toggle Bolts
ASME B18.2.1.
2.1.7.4 Bolts, Nuts, Studs and Rivets
ASME B18.2.2 and ASTM A 687 or ASTM A 307.
2.1.7.5 Powder Driven Fasteners
Follow safety provisions of ASSE/SAFE A10.3.
2.1.7.6 Screws
ASME B18.2.1, ASME B18.6.2, and ASME B18.6.3.
2.1.7.7 Washers
Provide plain washers to conform toASME B18.22M ASME B18.22.1. Provide beveled washers for American Standard
beams and channels, square or rectangular, tapered in thickness, and smooth. Provide lock washers to conform
to ASME B18.21.2M ASME B18.21.1.
2.1.8 Aluminum Alloy Products
Conform to ASTM B 209M ASTM B 209 for sheet plate, ASTM B 221M ASTM B 221 for extrusions and ASTM B 26/B 26M
or ASTM B 108/B 108M for castings, as applicable. Provide aluminum extrusions at least 3 mm 1/8 inch thick and
aluminum plate or sheet at least 1.3 mm 0.050 inch thick.
2.2 FABRICATION FINISHES
NOTE: The Material Safety Data Sheets (MSDS) for coating materials shall show
exclusion or replacement of the following materials as intended ingredients:
asbestos, benzene, chromium compounds, coal tar, 2-ethoxyethanol and 2-methoxyethanol
and their acetates, halogenated hydrocarbons, and lead compounds. The content
of volatile organic compounds (VOC), and marking, shall be in compliance with
air quality regulations for the type of application and jurisdiction where used.
2.2.1 Galvanizing
NOTE: Specify galvanizing for items installed in exterior exposures subject
to salt spray or corrosive fumes and interior areas subject to continual wetting
or high humidity.
Hot-dip galvanize items specified to be zinc-coated, after fabrication where practicable. Galvanizing: ASTM A 123/A 123M
, ASTM A 153/A 153M, ASTM A 653/A 653M or ASTM A 924/A 924M, Z275 G90, as applicable.
2.2.2 Galvanize
Anchor bolts, grating fasteners, washers, and parts or devices necessary for proper installation, unless indicated
otherwise.
2.2.3 Repair of Zinc-Coated Surfaces
NOTE: Delete this paragraph when no galvanized items are specified.
Repair damaged surfaces with galvanizing repair method and paint conforming to ASTM A 780 or by application of
stick or thick paste material specifically designed for repair of galvanizing, as approved by Contracting Officer.
Clean areas to be repaired and remove slag from welds. Heat surfaces to which stick or paste material is applied,
with a torch to a temperature sufficient to melt the metallics in stick or paste; spread molten material uniformly
over surfaces to be coated and wipe off excess material.
2.2.4 Shop Cleaning and Painting
NOTE: Shop painting herein is for structural steel protected from the weather
and not subjected to corrosive environments. For steel which will be exposed
to the weather or corrosive environments, modify the shop painting accordingly.
2.2.4.1 Surface Preparation
Blast clean surfaces in accordance with SSPC SP 6. Surfaces that will be exposed in spaces above ceiling or
in attic spaces, crawl spaces, furred spaces, and chases may be cleaned in accordance with SSPC SP 3 in lieu
of being blast cleaned. Wash cleaned surfaces which become contaminated with rust, dirt, oil, grease, or other
contaminants with solvents until thoroughly clean. Steel to be embedded in concrete shall be free of dirt and
grease. Do not paint or galvanize bearing surfaces, including contact surfaces within slip critical joints,
but coat with rust preventative applied in the shop.
2.2.4.2 Pretreatment, Priming and Painting
NOTE: Use manufacturers standard treatment when painting and finishing is required.
Apply pretreatment, primer, and paint in accordance with manufacturer's printed instructions. [On surfaces concealed
in the finished construction or not accessible for finish painting, apply an additional prime coat to a minimum
dry film thickness of 0.03 mm 1.0 mil. Tint additional prime coat with a small amount of tinting pigment.]
2.2.5 Nonferrous Metal Surfaces
Protect by plating, anodic, or organic coatings.
2.2.6 Aluminum Surfaces
2.2.6.1 Surface Condition
Before finishes are applied, remove roll marks, scratches, rolled-in scratches, kinks, stains, pits, orange peel,
die marks, structural streaks, and other defects which will affect uniform appearance of finished surfaces.
2.2.6.2 Aluminum Finishes
Unexposed sheet, plate and extrusions may have mill finish as fabricated. Sandblast castings' finish, medium,
AA DAF-45, or AA 46. Unless otherwise specified, provide all other aluminum items with a [standard mill finish.]
[hand sanded or machine finish to a 240 grit.] [anodized finish.] Provide a coating thickness not less than that
specified for protective and decorative type finishes for items used in interior locations or architectural Class
I type finish for items used in exterior locations in AA DAF-45. Provide a polished satin finish om items to
be anodized.
2.3 ACCESS DOORS AND PANELS
NOTE: Access doors and panels in fire-rated walls and ceilings must be of equivalent
fire ratings. Coordinate the location of access doors and panels with the mechanical
drawings and specifications. Prime coat should be specified if it is desirable
to have a field painted finish.
Provide flush type access doors and panels unless otherwise indicated. Fabricate frames for access doors of
steel not lighter than 1.9 mm 14 gage with welded joints and anchorage for securing into construction. Provide
access doors with a minimum of 350 by 500 mm 14 by 20 inches and of not lighter than 1.9 mm 14 gage steel, with
stiffened edges and welded attachments. Provide access doors hinged to frame and with a flush-face, turn-screw-operated
latch. [Provide exposed metal surface with a baked enamel finish.] [Provide exposed metal surfaces with a shop
applied prime coat.]
NOTE: For BEQ projects which have terminal air blenders, add the bracketed
item.
[Provide ceiling access panels for terminal air blenders as indicated. Provide pin-tumbler cylinder locks with
appropriate cams in lieu of screwdriver-operated latches.]
2.4 CONTROL-JOINT COVERS
NOTE: Use control-joint covers only when necessary to meet specific job requirements
such as elimination of cracks which would be difficult to clean.
Provide control-joint covers to be located on wall surfaces of concrete, masonry and tile work. Provide protective
coating on the surface in contact with concrete, masonry or tile.
2.5 CORNER GUARDS AND SHIELDS
For jambs and sills of openings and edges of platforms provide steel shapes and plates anchored in masonry or
concrete with welded steel straps or end-weld stud anchors. Form corner guards for use with glazed or ceramic
tile finish on walls with 1.6 mm 0.0625 inch thick corrosion-resisting steel with polished or satin finish, extend
1.5 m 5 feet above the top of cove base or to the top of the wainscot, whichever is less, and securely anchor
to the supporting wall. Corner guards on exterior shall be [galvanized] [_____].
2.6 COVER PLATES AND FRAMES
NOTE: Insert required live load value in the blank space. Select requirements
for floor plate removal method. Specific pattern should not be indicated unless
required for matching purposes or to meet design requirements.
Fabricate cover plates of [6] [_____] mm [1/4] [_____] inch thick rolled steel weighing not more than 45 kg 100
pounds per plate with a [selected raised pattern nonslip top surface] [slip-resistant, carbon steel conforming
to ASTM A 283/A 283M having a minimum static coefficient of friction of 0.50 when tested in accordance with ASTM D 2047
. On wearing surfaces provide aluminum oxide or silicon carbide.]. Plate shall be [galvanized] [shop painted].
Reinforce to sustain a live load of [_____] MPa [_____] pounds per square foot. Frames shall be structural steel
shapes and plates, [with bent steel bars or headed anchors welded to frame for anchoring to concrete] [securely
fastened to the structure as indicated]. Miter and weld all corners. Butt joint straight runs. Allow for expansion
on straight runs over 4500 mm 15 feet. [Provide holes for lifting tools.] [Provide flush drop handles for removal
formed from 6 mm 1/4 inch round stock where indicated.] [Provide holes and openings with 13 mm 1/2 inch clearance
for pipes and equipment.] Remove sharp edges and burrs from cover plates and exposed edges of frames. Weld
all connections and grind top surface smooth. Weld bar stops every six inches. Provide 3 mm 1/8 inch clearance
at edges and between cover plates.
2.7 EXPANSION JOINT COVERS
NOTE: Design floor expansion joint covers to support the required loads in
the area and permit the calculated movement. Design floor expansion joint covers
so that top of cover plate is flush with adjoining finished floor surfaces.
Use plain-surface floor plate on interior finished floors and abrasive-surface
floor plate on exposed concrete interior floors and exterior applications.
Covers may be of steel if deemed adequate for serviceability, and the paragraph
modified accordingly. Detail expansion joints on the drawings. The expansion
joint must have the same fire rating as the floor.
Provide expansion joint covers constructed of extruded aluminum with anodized satin aluminum finish for walls
and ceilings and with standard mill finish for floor covers and exterior covers. Furnish plates, backup angles,
expansion filler strip and anchors as indicated. [Provide a [_____]-hour fire rating expansion joint system.]
2.8 EXTRUDED FLOOR MAT FRAMES
Provide recess frames for roll-up floor mats of extruded 6063-T5 aluminum, in sizes shown. Miter corners to
ensure accurate fitting. Determine depth of recess by the mat thickness. Anchor frames in concrete with anchor
pins or bolts. Provide roll-up mats of aluminum construction with [carpet] [vinyl] [serrated aluminum] [abrasive]
surface. Provide roll-up mats for use in [level surface area.] [recessed area. Show construction details of
recessed areas on the drawings.]
2.9 FLOOR GRATINGS AND ROOF WALKWAYS
NOTE: Insert required live load value in the blank space.
NOTE: Gratings for treads and landings should be considered for maintenance
walkways, anti-skid platforms, maintenance and inspection walkways, mezzanine
flooring, rooftop walkways, storage areas, catwalks and staging platforms.
Grating tread type has openings thru the surface; consider footwear worn by
personnel using these facilities. Select frame anchorage for the applicable
installation. Where banding is required to be load bearing, drawings must detail
the welding of banding to bearing bars. Walkways must be designed to allow
roof movements and to resist wind forces and creep. At building expansion joints
a bridge piece should be installed. Supports must be sized to distribute the
walkway loads to the roof material. Where not specified elsewhere use NAAMM
MBG 532 when grating supports vehicular traffic.
Design [steel] [aluminum] grating in accordance with NAAMM MBG 531[NAAMM MBG 532] for bar type grating or manufacturer's
charts for plank grating. [Galvanize steel floor gratings.]
a. Design floor gratings to support a stress live load of [_____] MPa [_____] pounds per square
foot for the spans indicated, with maximum deflection of L/240.
b. [NAAMM MBG 531[NAAMM MBG 532], band edges of grating with bars of the same size as the bearing
bars. Weld banding in accordance with the manufacturer's standard for trim [unless otherwise
indicated]. Design tops of bearing bars, cross or intermediate bars to be in the same plane
and match grating finish.]
--or--
[NAAMM MBG 531[NAAMM MBG 532], band ends of gratings with bars of the same or greater thickness
than the metal used for grating. Weld banding bars to the bearing bars or channels at least
every fourth bar or channel and in every corner. Tack weld intervening bars or channels. Band
diagonal or round cuts by welding bars of the same or greater thickness metal used for grating
in accordance with the manufacturer's standard for trim [unless otherwise indicated].]
c. [Attach gratings to structural members with welded-on anchors.] [Anchor gratings to structural
members with bolts, toggle bolts, or expansion shields and bolts.] [Attach grating as per manufacturer's
roof attachment system.]
NOTE: Use coefficient of friction minimum of 0.6 where used along an accessible
route.
d. Slip resistance requirements must exceed both wet and dry a static coefficient of friction
of 0.5[0.6] as tested in accordance with ASTM F 1679.
[e. Rooftop walkway: Minimum 600 mm 2 feet wide, 1.8 mm 14 gage, ASTM A 653/A 653M, Z275 G-90
, steel with slip resistant surface. Furnish all brackets, connectors and other accessories.
Support at minimum 1500 mm 5 foot intervals on hard rubber pads in accordance with manufacturers
instructions.]
2.10 GAS-TIGHT MANHOLE COVER AND FRAME
Provide a heavy duty type made of ductile cast-iron with bolted lid, machined bearing surfaces and gasket grooves,
continuous neoprene gasket, counter sunk bronze hex head cap screws, and concealed watertight pickholes. Provide
frame with a 760 mm 30 inch diameter clear opening. Maximum weight of frame and cover together to be 240 kg
530 pounds.
2.11 GUARD POSTS (BOLLARDS/PIPE GUARDS)
Provide [_____] mm [_____] inch [galvanized] [prime coated] [standard] [extra strong] weight steel pipe as specified
in ASTM A 53/A 53M. Anchor posts in concrete [as indicated] and fill solidly with concrete with minimum compressive
strength of 17 MPa 2500 psi.
2.12 MISCELLANEOUS PLATES AND SHAPES
NOTE: Indicate construction details on the drawings for clarification of the
type and the arrangement of miscellaneous metal.
Provide for items that do not form a part of the structural steel framework, such as lintels, sill angles, [support
framing for ceiling-mounted toilet partitions,] miscellaneous mountings and frames. Provide lintels fabricated
from structural steel shapes over openings in masonry walls and partitions [as indicated and] as required to
support wall loads over openings. Provide with connections and [fasteners] [welds]. Construct to have at least
200 mm 8 inches bearing on masonry at each end.
Provide angles and plates, ASTM A 36/A 36M, for embedment as indicated. Galvanize embedded items exposed to
the elements according to ASTM A 123/A 123M.
2.13 SAFETY CHAINS
Construct safety chains of galvanized steel, straight link type, 5 mm 3/16 inch diameter, with at least twelve
links per 300 mm foot, and with snap hooks on each end. Test safety chain in accordance with ASTM A 467/A 467M
, Class CS. Provide snap hooks of boat type. Provide galvanized 10 mm 3/8 inch bolt with 20 mm 3/4 inch eye
diameter for attachment of chain, anchored as indicated. Supply two chains, 100 mm 4 inches longer than the
anchorage spacing, for each guarded area. Locate safety chain where indicated. Mount the top chain 1050 mm
feet 6 inches[_____] above the [floor] [ground] and mount the lower chain 600 mm 2 feet [_____] above the [floor]
[ground].
2.14 SECURITY GRILLES
Fabricate of channel frames with not less than two masonry anchors at each jamb and 12 mm 1/2 inch hardened steel
bars spaced not over 100 mm 4 inches both ways and welded to frame. Provide 18 by 16 mesh screen and two layers
of 6 mm 1/4 inch hardware cloth clamped to frame.
2.15 STEEL PLATE WAINSCOTS FOR CONCRETE OR MASONRY COLUMNS
Shop bend to radius for round columns and at right angles for square and rectangular columns with slight 6 mm
1/4 inch radius on corners, with no horizontal joints and not more than 2 vertical joints single strapped and
butt welded with a thickness of [_____].
2.16 STRUCTURAL STEEL DOOR FRAMES
NOTE: Choose one of the two options below.
NOTE: Select the applicable paragraph(s) from the following:
[a. Provide frames as indicated. If not otherwise shown, construct frames of structural shapes,
or shape and plate composite, to form a full depth channel shape with at least 40 mm 1 1/2 inch
outstanding legs. For single swing doors, provide continuous 16 by 40 mm 5/8 by 1 1/2 inch
bar stock stops at head and jambs. For freight elevator hoistway entrance, include a non-skid
metal sill [as indicated].]
b. Where track, guides, hoods, hangers, operators, and other such accessories are required,
provide support as indicated.
c. Provide jamb anchors near top, bottom, and at not more than 600 mm 24 inch intervals. Provide
the bottom of each jamb member with a clip angle welded in place with two 12 mm 1/2 inchdiameter
floor bolts for adjustment.
[d. Provide spreaders between bottoms of floor jamb members. When floor construction permits,
they may be left in place, concealed in the floor.]
--or--
[Provide frames of rolled shapes as indicated. Miter and weld heads to jambs, or have riveted clip angle connections
concealed in the finished work. Provide frames for swinging doors with 16 by 40 mm 5/8 by 1 1/2 inch solid bar
stops secured to the frame by welding or by 6 mm 1/4 inch diameter countersunk machine screws spaced not more
than 300 mm 12 inches on centers. Stiffen head openings greater than 900 mm 3 feet sufficient to limit deflection
to not more than 2 mm 1/16 inch. Secure frames to masonry with zinc-coated metal anchors spaced not more than
750 mm 30 inches on centers. Where necessary to engage the threads of machine screws for fastening hardware,
back frames on inside faces with steel plates of suitable thickness; tap frames and reinforcing plates as necessary
for the installation of hardware and other work. Countersink rivets and screw heads where exposed in the finished
work. Grind welds smooth.]
2.17 WHEEL GUARDS
Provide wheel guards of hollow, heavy-duty type cast iron conforming to ASTM A 48/A 48M, with shaped, [rounded
][half round ][three quarters round ]top, at least 450 mm 18 inches high, and designed to provide a minimum of
150 mm 6 inches of protection.
2.18 WINDOW[ AND DOOR] GUARDS, DIAMOND-MESH TYPE
NOTE: Select mesh size for woven wire. Include expanded metal option when
40 mm 1 1/2 inch mesh is specified. Delete remaining parenthetical portions.
Specify proper portion for interior or exterior installation. Select the type
of window guard which best suits job requirements.
Provide diamond-mesh window[ and door] guards constructed of woven steel wire [or expanded metal ]framed with
hot-rolled or cold-formed structural steel shapes. Provide woven wire panels of 3.3 mm 10 gage, 40 mm 1 1/2
inch mesh secured through weaving bar to 25 by 12 by 3 mm one by 1/2 by 1/8 inchthick channel frame. Miter and
weld corners of frames. [Provide expanded metal panels conforming to ASTM F 1267. ]38 mm, [Mount window[ and
door] guards on interior of window[ and door] frame with not less than two tamperproof hinged butts mounted on
wood jambs with 6 mm 1/4 inch lag bolts, to masonry jamb with toggle bolts, or welded to metal jambs.] [Mount
window[ and door] guards on exterior of window frame with not less than two tamperproof hinged butts mounted
on 25 by 12 by 3 mm one by 1/2 by 1/8 inchjamb channel attached as indicated to 50 by 6 mm 2 by 1/4 inchplate
anchored to wood jamb with 6 mm 1/4 inch lag bolts; to masonry jamb with toggle bolts, or to concrete jambs and
solid masonry jambs with expansion shields and bolts.] Provide one additional butt for each 900 mm 3 foot internal
length of guard over 1500 mm 5 feet. Provide one tamperproof hasp and padlock, with access from the interior,
for each butt used and installed on the jamb opposite to that hinged. [Provide galvanized guards and accessories.]
2.19 WINDOW[ AND DOOR] GUARDS, WOVEN WIRE
Provide woven wire window[ and door] guards of size necessary to completely fill opening. Construct guards with
1 0 mm 3/8 inch round rod frame and 40 mm 1 1/2 inch diamond-mesh of No. 10 U.S. Gage (3.4 mm) (0.135 diameter)
wire; all material zinc-coated. Provide at least three hinge side clips on one side and two lock ring hasps
on opposite side.
2.20 CHIMNEYS, VENTS, AND SMOKESTACKS
Design and construct chimneys and vents in accordance with NFPA 211. Form chimney connectors of not lighter
than 1.01 mm (20 gauge) 20 gauge galvanized steel. Design and construct stacks to withstand a wind velocity
of [_____] km/h mile/h in accordance with ASCE 7. Construct unlined stacks of black-steel plates not less than
5 mm 3/16 inch thick conforming to ASTM A 36/A 36M. Weld seams and joints, except provide an angle flange for
connection to the boiler, other equipment, and stack support.
2.21 CLEANOUT DOORS
Provide [galvanized] [cast iron]cleanout doors with frames, and unless otherwise indicated sized to match flues.
Provide a continuous flange and anchors for securing frames into masonry. The doors shall be smokeproof, hinged,
and have fastening devices to hold the door closed.
2.22 COAL-HOPPER DOORS
Construct coal-hopper doors of [galvanized] [_____] steel plates and shapes and complete with frame, stops, wall
box, hinges, and hasp or locktype latch. Weld joints and attachments.
2.23 DOWNSPOUT BOOTS
Provide cast iron downspout boots with receiving bells sized to fit downspouts.
2.24 FOUNDATION VENTS
Provide foundation vents of the same size as the masonry units or sized as indicated, and made of extruded aluminum
with integral water stop and sliding interior closer or damper operable from the outside. Provide an insect
screen at the back of the vent. Provide Louvered openings with top and bottom drip lips, and the net ventilating
area with closer or damper open at least 35 percent of the gross wall opening. The frames shall have a structural
strength adequate to permit use in masonry walls without a lintel.
2.25 GUY CABLES
Guy cables shall be prestretched, galvanized wire rope of the sizes indicated. Wire rope shall conform to ASTM A 475
, high strength grade with Class A coating. Guys shall have a factory attached clevis top-end fitting; a factory
attached open-bridge strand socket bottom-end fitting; and be complete with oval eye, threaded anchor rods.
Fittings and accessories shall be hot-dip galvanized.
2.26 WINDOW SUB-SILL
Provide window sub-sill of extruded aluminum alloy with size and design indicated. Provide not less than two
anchors per window section for securing into mortar joints of masonry sill course. Provide sills for banks of
windows with standard mill finish with a protective coating, prior to shipment, of two coats of a clear, colorless,
methacrylate lacquer applied to all surfaces of the sills.
2.27 WINDOW WELLS
Window wells shall be not lighter than 1.5 mm (16 gauge), 16 gauge,corrugated sheet steel, hot-dip galvanized
after fabrication with top edge of walls having a 19 mm 3/4 inch bead or rolled top. Window wells shall be semicircular
or semielliptical in form and shall overlap the window by at least 75 mm 3 inches on each side. Removable cover,
hot-dip galvanized after fabrication, consisting of steel bar grate with bars spaced at not more than 50 mm 2
inch centers and welded to 25 by 6 mm 1 by 1/4 inch frame shall be designed to fit into and rest on top edge
of window well.
PART 3 EXECUTION
3.1 GENERAL INSTALLATION REQUIREMENTS
Install items at locations indicated, according to manufacturer's instructions. Verify all measurements and
take all field measurements necessary before fabrication. Exposed fastenings shall be compatible materials,
shall generally match in color and finish, and harmonize with the material to which fastenings are applied.
Include materials and parts necessary to complete each item, even though such work is not definitely shown or
specified. Poor matching of holes for fasteners shall be cause for rejection. Conceal fastenings where practicable.
Thickness of metal and details of assembly and supports shall provide strength and stiffness. Form joints exposed
to the weather shall be formed to exclude water. Items listed below require additional procedures.
3.2 WORKMANSHIP
Provide miscellaneous metalwork that is well formed to shape and size, with sharp lines and angles and true curves.
Drilling and punching shall produce clean true lines and surfaces. Provide continuous welding along the entire
area of contact except where tack welding is permitted. Do not tack weld exposed connections of work in place
and ground smooth. Provide a smooth finish on exposed surfaces of work in place and unless otherwise approved,
flush exposed riveting. Mill joints where tight fits are required. Corner joints shall be coped or mitered,
well formed, and in true alignment. Accurately set work to established lines and elevations and securely fastened
in place. Install in accordance with manufacturer's installation instructions and approved drawings, cuts, and
details.
3.3 ANCHORAGE, FASTENINGS, AND CONNECTIONS
Provide anchorage where necessary for fastening miscellaneous metal items securely in place. Include for anchorage
not otherwise specified or indicated slotted inserts, expansion shields, and powder-driven fasteners, when approved
for concrete; toggle bolts and through bolts for masonry; machine and carriage bolts for steel; through bolts,
lag bolts, and screws for wood. Do not use wood plugs in any material. Provide non-ferrous attachments for
non-ferrous metal. Make exposed fastenings of compatible materials, generally matching in color and finish,
to which fastenings are applied. Conceal fastenings where practicable.
3.4 BUILT-IN WORK
Form for anchorage metal work built-in with concrete or masonry, or provide with suitable anchoring devices as
indicated or as required. Furnish metal work in ample time for securing in place as the work progresses.
3.5 WELDING
Perform welding, welding inspection, and corrective welding, in accordance with AWS D1.1/D1.1M. Use continuous
welds on all exposed connections. Grind visible welds smooth in the finished installation.
3.6 FINISHES
3.6.1 Dissimilar Materials
Where dissimilar metals are in contact, protect surfaces with a coat conforming to MPI 79 to prevent galvanic
or corrosive action. Where aluminum is in contact with concrete, plaster, mortar, masonry, wood, or absorptive
materials subject to wetting, protect with ASTM D 1187, asphalt-base emulsion.
3.6.2 Field Preparation
NOTE: Delete these paragraphs when Section 09 90 00, PAINTS AND COATINGS is
included in the project specifications.
Remove rust preventive coating just prior to field erection, using a remover approved by the rust preventive
manufacturer. Surfaces, when assembled, shall be free of rust, grease, dirt and other foreign matter.
3.6.3 Environmental Conditions
Do not clean or paint surface when damp or exposed to foggy or rainy weather, when metallic surface temperature
is less than -15 degrees C 5 degrees F above the dew point of the surrounding air, or when surface temperature
is below 7 degrees C or over 35 degrees C 45 degrees F or over 95 degrees F, unless approved by the Contracting
Officer.
3.7 ACCESS PANELS
Install a removable access panel not less than 300 by 300 mm 12 by 12 inches directly below each valve, flow
indicator, damper, or air splitter that is located above the ceiling, other than an acoustical ceiling, and that
would otherwise not be accessible.
3.8 CONTROL-JOINT COVERS
Provide covers over control-joints and fasten on one side only with fasteners spaced to give positive contact
with wall surfaces on both sides of joint throughout the entire length of cover.
3.9 COVER PLATES AND FRAMES
Install the tops of cover plates and frames flush with floor.
3.10 WHEEL GUARDS
Anchor guards to concrete or masonry in accordance with manufacturer's instructions. Fill hollow cores solid
with concrete with minimum compressive strength of 17 MPa 2500 psi.
[3.11 ROOF HATCH (SCUTTLES)
Provide [aluminum] [zinc-coated steel sheets not less than 1.9 mm 14 gage,] with 75 mm 3 inch beaded flange,
welded and ground at corner. Provide a minimum clear opening of 760 by 900 mm 30 by 36 inches. Construction
and accessories as follows:
a. Insulate cover and curb with 25 mm one inch thick rigid fiberboard insulation covered and
protected by [aluminum sheet] [zinc-coated steel liner not less than 0.45 mm 26 gage]with 300
mm 12 inches high curb, formed with 75 mm 3 inch mounting flange with holes provided for securing
to the roof deck. Equip the curb with an integral metal cap flashing of the same gage and metal
as the curb, full welded and ground at corners for weather tightness.
b. Provide hatch completely assembled with pintle hinges, compression spring operators enclosed
in telescopic tubes, positive snap latch with turn handles on inside and outside, and neoprene
draft seal. Provide fasteners for padlocking on the inside. Equip the cover with an automatic
hold-open arm complete with grip handle to permit one-hand release. Cover action shall be smooth
through its entire range with an operating pressure of approximately 130 N 30 pounds.
]
3.12 INSTALLATION OF CHIMNEYS, VENTS, AND SMOKESTACKS
Install chimneys and vents in accordance with NFPA 211. Provide a cleanout opening with a tight-fitting, hinged,
cast-iron door and frame at the base of each smokestack. Provide a top band on stacks for attachment of painter's
rigging. Provide roof housing, rain cap, downdraft diverter, fire damper, and other accessories required for
a complete installation. Join sections of prefabricated lined stacks with acid-resisting high-temperature cement
and steel draw bands. Provide means to prevent accumulation of water in the smokestack.
3.13 DOOR GUARD FRAME
Mount door guard frame over the glazed opening using 6 mm 1/4 inch lag bolts on the interior of wood doors or
tamperproof through bolts on the interior of metal doors.
3.14 INSTALLATION OF GUARD POSTS (BOLLARDS/PIPE GUARDS)
NOTE: Details of pipe guard installation will be shown on the drawings.
Set pipe guards vertically in concrete piers. Construct piers of, and the hollow cores of the pipe filled with,
concrete having a compressive strength of 21 MPa.3000 psi.
3.17 INSTALLATION OF DOWNSPOUT BOOTS
Secure downspouts to building through integral lips with appropriate fasteners.
3.15 RECESSED FLOOR FRAMES & MATS
Verify field measurements prior to releasing materials for fabrication by the manufacturer. Use a mat frame
to ensure recess accuracy in size, shape and depth. Form drain pit by blocking out concrete when frames are
installed, dampproof after concrete has set. Assemble frames onsite and install so that upper edge will be level
with finished floor surface. Screeded the concrete base inside the mat recess frame area using the edge provided
by the frame as a guide and anchor into the cement with anchor pins a minimum of 610 mm 24 inches on centers.
3.16 MOUNTING OF SAFETY CHAINS
Mount safety chains 1070 mm 3 feet 6 inches and 610 mm 2 feet above the floor.
3.17 STRUCTURAL STEEL DOOR FRAMES
Secure door frames to the floor slab by means of angle clips and expansion bolts. Weld continuous door stops
to the frame or tap screwed with countersunk screws at no more than 450 mm 18 inchcenters, assuring in either
case full contact with the frame. Make any necessary reinforcements and drill and tap the frames as required
for hardware.
3.18 INSTALLATION OF WHEEL GUARDS
Fill wheel guards with concrete and anchor to the floor or the building according to the manufacturer's recommendations.
3.19 BAR-GRILLE WINDOW GUARDS
Securely anchor bar-grille window guards to masonry with 13 mm 1/2 inch diameter prison-type screws or bolts
and expansion shields, or other type of fastenings if the ends of such fastenings are welded to the adjoining
metal grilles or otherwise made tamperproof in a satisfactory manner. Spanner-head screws or bolts are not considered
prison-type fasteners.
3.20 DIAMOND MESH WINDOW [AND DOOR ]GUARDS
Mount diamond mesh window guards on [interior window frame with not less than two tamperproof hinged butts mounted
on wood jambs.] [exterior of window frame with not less than two tamperproof hinged butts mounted on 25 by 300
by 3 mm 1 by 12 by 1/8 inch jamb channel attached as indicated to 50 by 6 mm 2 by 1/4 inch plate anchored to
wood jamb with 6 mm 1/4 inch lag bolt, to masonry jamb with toggle bolts, or to concrete jambs and solid masonry
jambs with expansion shields and bolts.] Provide one additional butt for each 900 mm 3 foot internal length
of guard over 1500 mm.5 feet. Install hasp and padlock on the jamb opposite to that hinged.
3.21 INSTALLATION OF WINDOW WELLS
Place window wells as shown with the walls securely anchored to foundation surface. Excavate the area within
the well to the bottom of the well and covered with a 100 mm 4 inch thick layer of coarse gravel or crushed rock.