SECTION 055000 - METAL FABRICATIONS
Copyright 2018 by The American Institute of Architects (AIA)
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SECTION 055000 - METAL FABRICATIONS
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1. RELATED DOCUMENTS
Retain or delete this article in all Sections of Project Manual.
A.
2. SUMMARY
A. Section Includes:
Several items in list below are not described in detail in Part 2. These items are covered by material requirements and articles such as "Miscellaneous Framing and Supports," but they must be indicated in detail on Drawings.
1.
2. Steel framing and supports for operable partitions.
3. Steel framing and supports for overhead [doors] [and] [grilles].
Retain first subparagraph below if steel angles or other shapes are used to support countertops between cheek walls.
4.
5. Steel framing and supports for [healthcare] [laboratory] equipment.
6. Steel tube reinforcement for low partitions.
7. Steel framing and supports for mechanical and electrical equipment.
8. Steel framing and supports for applications where framing and supports are not specified in other Sections.
9. Elevator machine beams[, hoist beams,] [and] [divider beams].
10. Steel shapes for supporting elevator door sills.
11. Steel girders for supporting wood frame construction.
12. Steel pipe columns for supporting wood frame construction.
13. Slotted channel framing.
Retain first subparagraph below if prefabricated columns are not specified in Section 051200 "Structural Steel Framing."
14.
15. Shelf angles.
Retain first subparagraph below for elevator pit ladders and other metal ladders.
16.
17. Ladder safety cages.
18. Alternating tread devices.
19. Metal [ships' ladders] [and] [pipe crossovers].
20. Metal floor plate[ and supports].
21. Elevator pit sump covers.
22. Structural-steel door frames.
23. Miscellaneous steel trim including [steel angle corner guards] [steel edgings] [and] [loading-dock edge angles].
24. Metal bollards.
25. Vehicular barrier cable systems.
26. [Pipe] [Downspout] guards.
Delete first subparagraph below if nosings and treads are specified with stairs and if cast-metal thresholds are specified with hardware.
27.
28. Cast-iron wheel guards.
29. Metal downspout boots.
Retain subparagraph below if bearing and leveling plates are not specified with items that they support.
30.
B. Products furnished, but not installed, under this Section include the following:
1. Loose steel lintels.
2. Anchor bolts, steel pipe sleeves, slotted-channel inserts, and wedge-type inserts indicated to be cast into concrete or built into unit masonry.
Retain subparagraph below if weld plates and angles are not specified in same Section as work that is welded to them.
3.
C. Related Requirements:
Retain subparagraphs below to cross-reference requirements Contractor might expect to find in this Section but are specified in other Sections.
1.
2. Section 051200 "Structural Steel Framing" for steel framing, supports, elevator machine beams, hoist beams, divider beams, door frames, and other steel items attached to the structural-steel framing.
3. Section 077200 "Roof Accessories" for manufactured metal roof walkways and metal roof stairs.
4. Section 329300 "Plants" for tree grates.
3. COORDINATION
A. Coordinate selection of shop primers with topcoats to be applied over them. Comply with paint and coating manufacturers' written instructions to ensure that shop primers and topcoats are compatible with one another.
B. Coordinate installation of metal fabrications that are anchored to or that receive other work. Furnish setting drawings, templates, and directions for installing anchorages, including sleeves, concrete inserts, anchor bolts, and items with integral anchors, that are to be embedded in concrete or masonry. Deliver such items to Project site in time for installation.
4. ACTION SUBMITTALS
A. Product Data: For the following:
1. Nonslip aggregates and nonslip-aggregate surface finishes.
2. Fasteners.
3. Shop primers.
4. Shrinkage-resisting grout.
5. Prefabricated building columns.
6. Slotted channel framing.
7. Manufactured metal ladders.
8. Ladder safety cages.
9. Alternating tread devices.
10. Metal [ships' ladders] [and] [pipe crossovers].
11. Metal bollards.
12. Vehicular barrier cable systems.
13. [Pipe] [Downspout] guards.
14. Abrasive metal [nosings] [treads] [and] [thresholds].
15. Cast-iron wheel guards.
16. Metal downspout boots.
B. Shop Drawings: Show fabrication and installation details.[ Include plans, elevations, sections, and details of metal fabrications and their connections. Show anchorage and accessory items.] Provide Shop Drawings for the following:
1. Steel framing and supports for ceiling-hung toilet compartments.
2. Steel framing and supports for operable partitions.
3. Steel framing and supports for overhead [doors] [and] [grilles].
4. Steel framing and supports for countertops.
5. Steel tube reinforcement for low partitions.
6. Steel framing and supports for mechanical and electrical equipment.
7. Steel framing and supports for applications where framing and supports are not specified in other Sections.
8. Elevator machine beams[, hoist beams,] [and] [divider beams].
9. Steel shapes for supporting elevator door sills.
10. Steel girders for supporting wood frame construction.
11. Steel pipe columns for supporting wood frame construction.
12. Prefabricated building columns.
13. Shelf angles.
14. Metal ladders.
15. Ladder safety cages.
16. Alternating tread devices.
17. Metal [ships' ladders] [and] [pipe crossovers].
18. Metal floor plate[ and supports].
19. Elevator pit sump covers.
20. Structural-steel door frames.
21. Miscellaneous steel trim including [steel angle corner guards] [steel edgings] [and] [loading-dock edge angles].
22. Metal bollards.
23. Loose steel lintels.
24. Vehicular barrier cable systems.
Retain "Samples for Verification" Paragraph below for two-stage Samples.
C.
Retain "Delegated-Design Submittal" Paragraph below if design services have been delegated to Contractor.
D.
5. INFORMATIONAL SUBMITTALS
Coordinate "Qualification Data" Paragraph below with qualification requirements in Section 014000 "Quality Requirements" and as may be supplemented in "Quality Assurance" Article.
A.
Usually, delete "Mill Certificates" Paragraph below unless Type 316L stainless steel is required. Type 316L is more expensive than Type 304 and submittal of mill certificates is one of the few ways of verifying that Type 316L is actually being furnished.
B.
Retain "Welding certificates" Paragraph below if retaining "Welding Qualifications" Paragraph in "Quality Assurance" Article.
C.
Retain "Paint Compatibility Certificates" Paragraph below if primers are fully specified in this Section rather than in painting Sections.
D.
E. Research Reports: For post-installed anchors.
6. QUALITY ASSURANCE
Retain "Welding Qualifications" Paragraph below if shop or field welding is required. If retaining, also retain "Welding certificates" Paragraph in "Informational Submittals" Article.
A.
1. AWS D1.1/D1.1M, "Structural Welding Code - Steel."
2. AWS D1.2/D1.2M, "Structural Welding Code - Aluminum."
3. AWS D1.6/D1.6M, "Structural Welding Code - Stainless Steel."
7. FIELD CONDITIONS
If possible, design metal fabrications so that they do not have to fit other construction and delete this article.
A.
PRODUCTS
Manufacturers and products listed in SpecAgent and MasterWorks Paragraph Builder are neither recommended nor endorsed by the AIA or Avitru. Before inserting names, verify that manufacturers and products listed there comply with requirements retained or revised in descriptions and are both available and suitable for the intended applications. For definitions of terms and requirements for Contractor's product selection, see Section 016000 "Product Requirements."
8.
Retain "Delegated Design" Paragraph below if Contractor is required to assume responsibility for design.
A.
Generally, retain "Structural Performance of Aluminum Ladders" Paragraph below for aluminum ladders unless Project's structural engineer is required to design building components. Delete if sizes of ladder components are specified or indicated on Drawings.
B.
C. Structural Performance of Alternating Tread Devices: Alternating tread devices shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:
1. Uniform Load: 100 lbf/sq. ft. (4.79 kN/sq. m).
2. Concentrated Load: 300 lbf (1.33 kN) applied on an area of 4 sq. in. (2580 sq. mm).
3. Uniform and concentrated loads need not be assumed to act concurrently.
4. Alternating Tread Device Framing: Capable of withstanding stresses resulting from railing loads in addition to loads specified above.
5. Comply with applicable railing loadings in Section 055213 "Pipe and Tube Railings."
Revise options in "Vehicular Barrier Cable Systems" Paragraph below to suit Project.
D.
"Thermal Movements" Paragraph below is for exterior metalwork; revise to suit Project conditions and metalwork exposure.
E.
Differential values in "Temperature Change" Subparagraph below (for aluminum in particular) are suitable for most of the United States.
1.
9. METALS
A. Metal Surfaces, General: Provide materials with smooth, flat surfaces unless otherwise indicated. For metal fabrications exposed to view in the completed Work, provide materials without seam marks, roller marks, rolled trade names, or blemishes.
Retain "Recycled Content of Steel Products" Paragraph below to specify recycled content if required. An alternative method of requiring recycled content is to retain requirement in Project's Division 01 sustainable design requirements Section that gives Contractor the option and responsibility to determine how recycled content requirements will be met.
B.
C. Steel Plates, Shapes, and Bars: ASTM A36/A36M.
Usually, retain Type 304 in "Stainless Steel Sheet, Strip, and Plate" and "Stainless Steel Bars and Shapes" paragraphs below; Type 316L is for corrosive environments.
D.
E. Stainless Steel Bars and Shapes: ASTM A276/A276M, [Type 304] [Type 316L].
"Rolled-Steel Floor Plate" Paragraph below specifies yield strength of 30 ksi (205 MPa); revise if higher strength is required.
F.
G. Rolled-Stainless Steel Floor Plate: ASTM A793.
H. Abrasive-Surface Floor Plate: Steel plate [with abrasive granules rolled into surface] [or] [with abrasive material metallically bonded to steel].
Retain "Manufacturers" Subparagraph below and list of manufacturers to require products from manufacturers listed or a comparable product from other manufacturers.
1.
a. Harsco Industrial IKG, a Division of Harsco Corporation.
b. Ross Technology Corporation.
c. W.S. Molnar Company.
d. .
7. Source Limitations: Obtain nonslip surfaces from single source from single manufacturer.
8. Provide platforms as indicated fabricated from welded or pressure-locked steel bar grating, supported by steel angles. Limit openings in gratings to no more than [1/2 inch (12 mm)] [3/4 inch (19 mm)] in least dimension.
Option in first subparagraph below can be deleted if supports are indicated on Drawings. ANSI A14.3 minimum support spacing is 10 feet (3 m).
9.
10. Galvanize[ and prime] [exterior ]ladders, including brackets.
11. Prime [exterior ]ladders, including brackets and fasteners, with [zinc-rich primer.] [primer specified in Section 099600 "High-Performance Coatings."]
C. Aluminum Ladders
Refer to for more information about angled fixed ladders.
1.
a. Halliday Products.
b. O'Keeffe's Inc.
c. Precision Ladders, LLC.
d. .
2. Source Limitations: Obtain units from single source from single manufacturer.
Six subparagraphs below are examples only; other types and sizes are available. Retain types required and revise to suit Project. Delete all six if configurations are indicated on Drawings.
3.
4. Nosings: Cross-hatched units, 1-1/2 by 1-1/2 inches (38 by 38 mm), for casting into concrete.
5. Treads: Cross-hatched units, full depth of tread with 3/4-by-3/4-inch (19-by-19-mm) nosing, for application over bent plate treads or existing stairs.
6. Thresholds: Fluted-saddle-type units, 5 inches (125 mm) wide by 1/2 inch (12 mm) high, with tapered edges.
7. Thresholds: Fluted-interlocking- (hook-strip-) type units, 5 inches (125 mm) wide by 5/8 inch (16 mm) high, with tapered edge.
8. Thresholds: Plain-stepped- (stop-) type units, 5 inches (125 mm) wide by 1/2 inch (12 mm) high, with 1/2-inch (12-mm) step.
B. Extruded Units: [Aluminum] [Bronze], with abrasive filler consisting of aluminum oxide, silicon carbide, or a combination of both, in an epoxy-resin binder. Fabricate units in lengths necessary to accurately fit openings or conditions.
Retain "Manufacturers" Subparagraph below and list of manufacturers to require products from manufacturers listed or a comparable product from other manufacturers.
1.
a. American Safety Tread Co., Inc.
b. Amstep Products.
c. Armstrong Products, Inc.
d. Balco, Inc.
e. Nystrom, Inc.
f. Upnovr, Inc.
g. Wooster Products Inc.
h. .
B. Source Limitations: Obtain downspout boots from single source from single manufacturer.
C. Provide downspout boots made from cast [iron] [aluminum] in heights indicated with inlets of size and shape to suit downspouts. Provide units with flanges and holes for countersunk anchor bolts.
1. Outlet: [Vertical, to discharge into pipe] [Horizontal, to discharge into pipe] [At 35 degrees from horizontal, to discharge onto splash block or pavement].
D. Prime cast-iron downspout boots with [zinc-rich primer.] [primer specified in Section 099600 "High-Performance Coatings."]
30. LOOSE BEARING AND LEVELING PLATES
A. Provide loose bearing and leveling plates for steel items bearing on masonry or concrete construction. Drill plates to receive anchor bolts and for grouting.
B. Galvanize bearing and leveling plates.
C. Prime plates with [zinc-rich primer.] [primer specified in Section 099600 "High-Performance Coatings."]
31. LOOSE STEEL LINTELS
A. Fabricate loose steel lintels from steel angles and shapes of size indicated for openings and recesses in masonry walls and partitions at locations indicated. Fabricate in single lengths for each opening unless otherwise indicated. Weld adjoining members together to form a single unit where indicated.
Retain first paragraph below if bearing lengths are not indicated on Drawings or in schedules.
B.
C. Galvanize[ and prime] loose steel lintels located in exterior walls.
D. Prime loose steel lintels located in exterior walls with [zinc-rich primer.] [primer specified in Section 099600 "High-Performance Coatings."]
32. STEEL WELD PLATES AND ANGLES
A. Provide steel weld plates and angles not specified in other Sections, for items supported from concrete construction as needed to complete the Work. Provide each unit with no fewer than two integrally welded steel strap anchors for embedding in concrete.
33. GENERAL FINISH REQUIREMENTS
A. Finish metal fabrications after assembly.
B. Finish exposed surfaces to remove tool and die marks and stretch lines, and to blend into surrounding surface.
34. STEEL AND IRON FINISHES
A. Galvanizing: Hot-dip galvanize items as indicated to comply with ASTM A153/A153M for steel and iron hardware and with ASTM A123/A123M for other steel and iron products.
Retain subparagraph below if galvanized items are painted.
1.
B. Preparation for Shop Priming Galvanized Items: After galvanizing, thoroughly clean galvanized surfaces of grease, dirt, oil, flux, and other foreign matter, and treat with metallic phosphate process.
C. Shop prime iron and steel items[ not indicated to be galvanized] unless they are to be embedded in concrete, sprayed-on fireproofing, or masonry, or unless otherwise indicated.
Delete subparagraph below if specifying only one shop primer.
1.
D. Preparation for Shop Priming: Prepare surfaces to comply with [SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."] [SSPC-SP 3, "Power Tool Cleaning."] [requirements indicated below:]
Retain or revise any of five subparagraphs below to suit Project service conditions of installed work. Insert other exposures and preparation requirements where applicable. See SSPC's painting manual.
1.
2. Items Indicated to Receive Zinc-Rich Primer: SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."
3. Items Indicated to Receive Primers Specified in Section 099600 "High-Performance Coatings": SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."
4. Other Steel Items: SSPC-SP 3, "Power Tool Cleaning."
5. Galvanized-Steel Items: SSPC-SP 16, "Brush-off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals."
E. Shop Priming: Apply shop primer to comply with SSPC-PA 1, "Paint Application Specification No. 1: Shop, Field, and Maintenance Painting of Steel," for shop painting.
Stripe painting adds cost but helps ensure that hard-to-reach areas, such as crevices, inside corners, and welds, are thoroughly coated and that sharp edges (which are vulnerable to chipping and are where the film may be thinner due to surface tension) receive adequate coverage.
1.
35. ALUMINUM FINISHES
Retain finishes in this article to suit Project. If retaining more than one, indicate location of each on Drawings or by inserts. As-fabricated finish is usually referred to as "mill finish."
A.
Clear anodic finish below is heavy-anodized finish; before specifying, verify availability with manufacturers.
B.
EXECUTION
36. INSTALLATION, GENERAL
A. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installing metal fabrications. Set metal fabrications accurately in location, alignment, and elevation; with edges and surfaces level, plumb, true, and free of rack; and measured from established lines and levels.
B. Fit exposed connections accurately together to form hairline joints. Weld connections that are not to be left as exposed joints but cannot be shop welded because of shipping size limitations. Do not weld, cut, or abrade surfaces of exterior units that have been hot-dip galvanized after fabrication and are for bolted or screwed field connections.
C. Field Welding: Comply with the following requirements:
1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.
2. Obtain fusion without undercut or overlap.
3. Remove welding flux immediately.
4. At exposed connections, finish exposed welds and surfaces smooth and blended so no roughness shows after finishing and contour of welded surface matches that of adjacent surface.
D. Fastening to In-Place Construction: Provide anchorage devices and fasteners where metal fabrications are required to be fastened to in-place construction. Provide threaded fasteners for use with concrete and masonry inserts, toggle bolts, through bolts, lag screws, wood screws, and other connectors.
E. Provide temporary bracing or anchors in formwork for items that are to be built into concrete, masonry, or similar construction.
F. Corrosion Protection: Coat concealed surfaces of aluminum that come into contact with grout, concrete, masonry, wood, or dissimilar metals with the following:
1. Cast Aluminum: Heavy coat of bituminous paint.
2. Extruded Aluminum: Two coats of clear lacquer.
Retain remaining articles below if applicable to Project. Insert others where needed to specify requirements applicable to a specific item not covered under general installation requirements above. Not all metal fabrications require separate installation articles but instead rely on general requirements above and details indicated on Drawings.
37.
A. General: Install framing and supports to comply with requirements of items being supported, including manufacturers' written instructions and requirements indicated on Shop Drawings.
B. Anchor supports for [ceiling hung toilet partitions] [operable partitions] [overhead doors] [and] [overhead grilles] securely to, and rigidly brace from, building structure.
C. Anchor shelf angles securely to existing construction with [expansion anchors] [anchor bolts] [through bolts].
D. Support steel girders on solid grouted masonry, concrete, or steel pipe columns. Secure girders with anchor bolts embedded in grouted masonry or concrete or with bolts through top plates of pipe columns.
1. Where grout space under bearing plates is indicated for girders supported on concrete or masonry, install as specified in "Installing Bearing and Leveling Plates" Article.
E. Install pipe columns on concrete footings with grouted baseplates. Position and grout column baseplates as specified in "Installation of Bearing and Leveling Plates" Article.
1. Grout baseplates of columns supporting steel girders after girders are installed and leveled.
38. INSTALLATION OF PREFABRICATED BUILDING COLUMNS
A. Install prefabricated building columns to comply with ANSI/AISC 360, "Specifications for Structural Steel Buildings," and with requirements applicable to listing and labeling for fire-resistance rating indicated.
39. INSTALLATION OF METAL BOLLARDS
A. Fill metal-capped bollards solidly with concrete and allow concrete to cure seven days before installing.
1. Do not fill removable bollards with concrete.
Retain one or more of first three paragraphs below for anchoring bollards.
B.
1. Embed anchor bolts at least 4 inches (100 mm) in concrete.
C. Anchor bollards in concrete [with pipe sleeves preset and anchored into concrete] [in formed or core-drilled holes not less than 42 inches (1050 mm) deep and 3/4 inch (19 mm) larger than OD of bollard]. Fill annular space around bollard solidly with shrinkage-resistant grout; mixed and placed to comply with grout manufacturer's written instructions. Slope grout up approximately 1/8 inch (3 mm) toward bollard.
First paragraph below can be used for bollards located in landscaping or unit pavers.
D.
Retain one of first two paragraphs below for anchoring removable bollards if any.
E.
F. Anchor internal sleeves for removable bollards in place with concrete footings. Center and align sleeves in holes 3 inches (75 mm) above bottom of excavation. Place concrete and vibrate or tamp for consolidation. Support and brace sleeves in position until concrete has cured.
G. Place removable bollards over internal sleeves and secure with 3/4-inch (19-mm) machine bolts and nuts. After tightening nuts, drill holes in bolts for inserting padlocks. Owner furnishes padlocks.
Retain paragraph below if bollards do not have metal caps.
H.
1. Do not fill removable bollards with concrete.
40. INSTALLATION OF VEHICULAR BARRIER CABLE SYSTEMS
This article is an example only; revise to suit Project.
A.
41. INSTALLATION OF PIPE GUARDS
This article is an example only; revise to suit Project or delete and indicate on Drawings.
A.
42. INSTALLATION OF NOSINGS, TREADS, AND THRESHOLDS
A. Center nosings on tread widths unless otherwise indicated.
B. For nosings embedded in concrete steps or curbs, align nosings flush with riser faces and level with tread surfaces.
C. Seal thresholds exposed to exterior with elastomeric sealant complying with Section 079200 "Joint Sealants" to provide a watertight installation.
43. INSTALLATION OF CAST-IRON WHEEL GUARDS
A. Anchor wheel guards to concrete or masonry construction to comply with manufacturer's written instructions. Fill cores solidly with concrete.
44. INSTALLATION OF BEARING AND LEVELING PLATES
A. Clean concrete and masonry bearing surfaces of bond-reducing materials, and roughen to improve bond to surfaces. Clean bottom surface of plates.
B. Set bearing and leveling plates on wedges, shims, or leveling nuts. After bearing members have been positioned and plumbed, tighten anchor bolts. Do not remove wedges or shims but, if protruding, cut off flush with edge of bearing plate before packing with shrinkage-resistant grout. Pack grout solidly between bearing surfaces and plates to ensure that no voids remain.
45. REPAIRS
A. Touchup Painting:
Retain first subparagraph below if touchup painting is included in this Section. Retain second subparagraph if it is specified in Section 099113 "Exterior Painting" or Section 099123 "Interior Painting." Revise reference if Section 099600 "High-Performance Coatings" is used.
1.
a. Apply by brush or spray to provide a minimum 2.0-mil (0.05-mm) dry film thickness.
2. Cleaning and touchup painting of field welds, bolted connections, and abraded areas of shop paint are specified in [Section 099113 "Exterior Painting."] [Section 099123 "Interior Painting."]
B. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing to comply with ASTM A780/A780M.
END OF SECTION 055000
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