05500-Metal Fabrications Spc
ST. VINCENTCOLLEGE
SIS AND HERMAN DUPRÉ SCIENCE PAVILION
SECTION 05 50 00 METAL FABRICATIONS
PART 1 GENERAL
1.01RELATED DOCUMENTS
A.Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.
1.02SECTION SUMMARY
A.Section includes:
1.Rough Hardware.
2.Loose steel lintels.
3.Miscellaneous structural steel members.
4.Miscellaneous steel framing and supports, including projector arm support in Atrium.
5.Miscellaneous steel trim.
6.Steel railings and handrails, exterior and interior.
7.Interior metal pan stairs.
8.Monumental stair construction in Atrium; stainless steel construction - Alternate. (ADD#2)
8A.Monumental stair construction in Atrium; steel construction – base bid. (ADD#2)
9.Stainless steel and glass architectural railings; perimeter of Atrium openings and other areas designated on the drawings.
10.Stainless steel and custom hardwood panels, architectural railings; Lecture Hall 131.
11.Steel ladders for elevator pits, mechanical areaways and Planetarium catwalks.
12.Metal bar grating for elevator pit, and exterior areaways.
13.Steel framing and supports for overhead door.
14.Miscellaneous steel sheeting to repair holes in existing floors.
15.Miscellaneous steel frame reinforcing in door frames, in metal stud walls with doors wider than 36”.
16.Miscellaneous steel to support ceilinghung toilet partitions.
17.Support angles for elevator doorsills.
18.Elevator hoist beams.
19.Steel framing and supports for mechanical and electrical equipment.
20.Steel truss framing system to support curtainwall.
21.Loose bearing and leveling plates.
22.Pipe supports for catwalk light fixtures.
23.Pipe bollards, fixed and removable. (ADD#4)
24.Miscellaneous iron and steel shapes, bars, plates fasteners, and castings required for complete installation of items listed above.
25.Grind all exposed welds smooth.
26.Shop prime all ferrous metal, including metal with galvanized finish.
27.Custom designed manhole covers; total of two(2).
28.Downspout enclosures at Atrium.
29.Decorative aluminum grille at solar chimney in Atrium.
30.Analemma tower assembly in courtyard.
1.03RELATED SECTIONS
A.Related Sections include:
1.Section 00 41 00 – Bid Form; Alternates.
2.Section 01 23 00 – Alternates.
3.Section 03 30 00 CastinPlace Concrete Work; Concrete for metal pan stairs; shrink resistant grout.
4.Section 04 20 00 Unit Masonry; Installing loose steel lintels.
5.Section 05 12 00 Structural Steel; Testing of Field
connections; thermal break material.
6.Section 06 40 00 Architectural Woodwork; Wood trim.
7.Section 06 50 00 – Structural Plastics, fiberglass gratings.
8.Section 07 62 00 – Flashing and sheet metal; downspouts at Atrium to fit into downspout enclosures.
9.Section 08 80 00 Glass and Glazing; including glass railings; Alternate for glass stair construction.
10.Section 09 66 00 – Terrazzo; pre-cast stair treads.
11.Section 09 90 00 Painting; Field Painting.
12.Section 14 24 00 - Hydraulic Elevators.
1.04REFERENCES
A.References Include:
1.ASTM - American Society for Testing and Materials.
2.AISI - American Iron and Steel Institute.
3.ASME - American Society of Mechanical Engineers
4.AWS - American Welding Society
5.FS - Federal Specification
6.NAAMM National Assoc. of Architectural Metal Manufact.
7.SSPC - Steel Structures Painting Council
8.The IBC - InternationalBuilding Code.
- The Aluminum Association, Inc.
1.05STRUCTURAL PERFORMANCES
A.Provide assemblies which, when installed, comply with the following minimum requirements for structural performance, unless otherwise indicated.
1.Treads and Platforms of Steel Stairs: Capable of withstanding a uniform live load of 100 lb./sq.ft.(4.79kN/sq.m) or a concentrated load of 300 lb.(1.33kN) on an area of 4 sq. in.(25.8sq.cm.), whichever produces the greater stress.
2.Handrail design and concentration: Handrails shall be designed and constructed for a concentrated load of 200 pounds(890 N) applied at any point and in any direction along the top railing member. Guardrail systems shall also be designed and constructed for a uniform load of 50 pounds per foot(730 N/m) applied horizontally at the required guardrail height and a simultaneous uniform load of 100 pounds per foot (1460 N/m)applied vertically downward at the top of the guardrail. The concentrated and uniform loading conditions shall not be applied simultaneously.
3.Guardrail system design and construction: Guardrails shall be designed and constructed for a concentrated load of 200 pounds (890 N)applied at any point and in any direction along the top railing member. Guardrail systems shall also be designed and constructed for a uniform load of 50 pounds per foot(730 N/m) applied horizontally at the required guardrail height and a simultaneous uniform load of 100 pounds per foot(1460N/m) applied vertically downward at the top of the guardrail. The concentrated and uniform loading conditions shall not be applied simultaneously.
4.Infill area between guards and railings: Capable of withstanding a horizontal concentrated load of 200 lbs.(890 N) applied to 1 sq.ft.(0.09sq.m)at any point in system, including panels, intermediate rails, balusters, wire mesh, or other elements composing infill area.
B.Codes and Standards for Miscellaneous Structural Steel: Comply with provisions of following, except as otherwise indicated.
1.AISC "Code of Standard Practice for SteelBuildings and Bridges".
2.AISC "Specifications for the Design, Fabrication, and Erection of Structural Steel for Buildings", including "Commentary" and Supplements thereto as issued.
3.AISC "Specifications for Architecturally Exposed Structural Steel".
4.AISC "Specifications for Structural Joints using ASTM A 325 or A 490 Bolts" approved by the Research Council on Riveted and Bolted Structural Joints of the Engineering Foundation.
5.American Welding Society AWS D1.1 Structural Welding Code.
C.Codes and standards for the Aluminum Association, Inc., "Aluminum Design Manual" and "Specifications for Aluminum Structures Allowable Stress Design." The American Welding Society AWS D1.2 Structural Welding Code Aluminum.
1.06SUBMITTALS
A.Product Data: Submit manufacturer's specifications, anchor details
and installation instructions for products used in miscellaneous metal fabrications, including paint products and grout.
B.Shop Drawings: Submit shop drawings for fabrication and erection of all miscellaneous metal fabrications. Include plans, elevations and details of sections and connections. Show anchorage and accessory items. Provide templates for anchor and bolt installation by others.
1.Where materials or fabrications are indicated to comply with certain requirements for design loading, include structural computations by a registered engineer, material properties and other information needed for structural analysis. Truss system to support curtainwall to be included in this work.
C.Samples: Submit samples for each type of metal finish indicated.
Prepare samples on metal on same gage and alloy to be used in work. Where normal color and texture variations are to be expected, provide "range" samples showing limits of such variations.
1.Include 18 inch(457mm)long samples of distinctly different railing members, including handrails, toprails, posts and rail coverings, if any. Include samples of fittings and brackets.
2.Samples shall be welded, ground, sandblasted and primed when delivered to Architect for approval.
C.LEED Documentation: Provide certification documentation that recycled steel content of metal fabrications, where possible, meets LEED requirements.
1.07QUALITY ASSURANCE
A.Field Measurements: Take field measurements prior to preparation of shop drawings and fabrication, where possible. Do not delay job progress; allow for trimming and fitting where taking field measurements before fabrication might delay work.
B.Shop Assembly: Preassemble items in shop to greatest extent possible to minimize field splicing and assembly. Disassemble units only as necessary for shipping and handling limitations.
1.Clearly mark units for reassembly and coordinated installations.
C.Metal fabrications shall comply with the following standards which
are hereby made, by reference, a part of this Specification.
1.AISC "Code of Standard Practice for SteelBuildings and Bridges."
2.AWS D1.1, "Code for Welding in Building Construction-Steel."
3.AWS D1.3, "Code for Welding in Building Construction-Sheet Steel."
4.AWS D1.6, “Structural Welding Code-Stainless Steel.”
5. Provide certification that welders to be employed in work have satisfactorily passed AWS Qualifications Tests.
5.NAAMM "Metal Stairs Manual".
- NAAMM "Pipe Railing Manual".
- NAAMM "Bar Grating Manual".
D.Codes: Metal pan stairs and handrail design shall meet the following codes:
1. IBC
2. OSHA
3. NFPA
E.Installer Qualifications: A firm specializing in work with not less than three years of experience in installing products similar to those required for this project with a record of successful service and a written statement from the manufacturer approving the firm as an installer of their product.
F.Manufacturer Qualifications: A firm with a minimum of three years experience in manufacturing and supplying the product to be installed. The firm to manufacture a product which meets all trade association and regulatory requirements pertaining to the product being manufactured.
G.Single Source Responsibility: Obtain products from a single manufacturer or source for a complete installation of product specified.
PART 2 PRODUCTS
2.01MATERIALS
A.Metals: Metal Surfaces, General; For fabrication of miscellaneous metal work which will be exposed to view, use only materials which are smooth and free of surface blemishes, including pitting, seam marks, roller marks, rolled trade names and roughness.
1.Steel Plates, Shapes and Bars: ASTM A 36/A 36M.
2.ColdFormed Steel Tubing: Cold formed, ASTM A 500, Grade B.
3.Stainless Steel Sheet, Strip, Plate, and Flat Bars: ASTM A666, Type 304.
4.Stainless Steel Bars and Shapes: ASTM A 276, Type 304.
5.Structural Steel Sheet: Hotrolled, ASTM A 570; or coldrolled ASTM A 611, Class 1; of grade required for design loading.
6.Steel Pipe: ASTM A 53; Type and Grade (if applicable) as selected by fabricator and as required for design loading; black finish, standard weight (schedule 40), unless otherwise indicated. Seamless pipe or tubing for handrails.
7.Gray Iron Castings: ASTM A 48, Class 30(ASTM A48M, Class 200).
8.Malleable Iron Castings: ASTM A 47, grade as selected by fabricator.
9.Brackets, Flanges and Anchors: Cast or formed metal of the same type material and finish as supported rails, unless otherwise indicated.
10.Handrail mouldings and trim: as indicated on drawings.
11.Aluminum: extruded alloy 6061-T6, structural tubing.
12.All materials to contain high-recycled-content steel; minimum of 90% recycled material (75% post-consumer steel).
B.Materials for Miscellaneous Structural Steel
1.Steel Plates, Shapes and Bars: ASTM A 36.
2.Cold-Formed Steel Tubing: Cold formed, ASTM A 500, Grade B.
3.Structural Steel Sheet: Hot-rolled, ASTM A 570; or cold-rolled ASTM A611, Class 1; of grade required for design loading.
4.Steel Pipe: ASTM A 53; Type E or S, Grade B.
5.Anchor Bolts: ASTM A 307, nonheaded type unless otherwise indicated.
6.High-Strength Threaded Fasteners: Heavy hexagon structural bolts, heavy hexagon nuts, and hardened washers, as follows:
a.Quenched and tempered medium-carbon steel bolts, nuts and washers, complying with ASTM A 325 or A 490.
7.Electrodes for Welding: Comply with AWS Code.
a.New steel use E70XX electrodes.
b.Existing steel use E60XX electrodes. (Test existing steel prior to welding).
c.For high-strength low-alloy steel; provide electrodes, welding rods and filler metals equal in strength and compatible in appearance with parent metal joined.
8.Headed Studs: ASTM A108 Grades 1010 thru 1020 cold finished carbon steel welded to steel members by automatic welding process - not stick welded.
C.Concrete Inserts: Threaded or wedge type; galvanized ferrous castings, either malleable iron, ASTM A 47(ASTM a 47M), or cast steel, ASTM A 27(ASTM A 27M). Provide bolts, washers and shims as required, hotdip galvanized, ASTM A 153(ASTM A 153M).
1.Capable of sustaining without failure, the load imposed within a safety factor of 4, as determined by testing per ASTM E488.
D.Galvanizing: Provide a zinc coating (Hot-Dip Galvanizing) for those items which are exposed to weathering, indicated on the drawings or specified to be galvanized.
1.ASTM A 153 for galvanizing iron and steel hardware.
2.ASTM A 123 for galvanizing rolled, pressed and forged steel shapes, plates, bars and strip 1/8 inch(3mm) thick and heavier.
3.ASTM A 385 for galvanizing assembled steel products.
E.Fasteners: General; Provide zinccoated fasteners for exterior use or where built into exterior walls. Stainless steel fasteners for glazed weathershield, exterior glass. Select fasteners for the type, grade and class required.
1.Bolts and Nuts: Regular hexagon head type, ASTM A 307,
Grade A.
2.Lag Bolts: Square head type, ASME B18.2.1(ASME B18.2.3.8M)
3.Machine Screws: Cadmium plated steel, ASME B18.6.3 (ASME B18.6.7M).
4.Plain Washers: Round, carbon steel, ASME B18.22.1 (ASME B18.22M).
5.Masonry Anchorage Devices: Expansion shields, ASTM B 633, Class Fe/Zn 5.
a.Capable of sustaining without failure, the load imposed within a safety factor of 4, as determined by testing per ASTM E488.
6.Use fasteners of same basic metal as the fastened metal, unless otherwise indicated. Do not use metals which are corrosive or incompatible with materials joined.
7.Provide concealed fasteners for interconnection of handrail and railing components and for their attachment to other work, except where otherwise indicated. Bolts shall be flathead, machine screws, cadmium plated steel FS FFS92.
8.Diameter of fasteners as required to meet system performance requirements.
F.Shop Primer Paint: Fastcuring, leadfree, abrasionresistant, rust inhibitive primer selected for compatibility with substrates and with types of acrylictype finish paint systems indicated, and for capability to provide a sound foundation for fieldapplied topcoats. Comply with performance requirements of FS TT-P-664.
1.Red Iron Oxide Acrylic Primer (Without Lead) as recommended by fabricator. Low VOC content meeting LEED requirements.
2.Primer selected must be compatible with finish coats of paint. Coordinate selection of metal primer with finish paint requirements specified in Division 9.
G.Galvanizing Repair Paint: High zinc dust content paint for regalvanizing welds in galvanized steel, with dry film containing not less than 94 percent zinc dust by weight, and complying with DOD-P-21035A or SSPC-Paint-20. Low VOC content meeting LEED requirements.
H.Bituminous Paint: Cold-applied asphalt mastic complying with SSPC-Paint 12, except containing no asbestos fibers, or cold-applied asphalt emulsion complying with ASTM D1187.
2.02FABRICATION
A.Workmanship: Use materials of size and thickness indicated or, if not indicated, as required to produce strength and durability in finished product for use intended. Work to dimensions shown or accepted on shop drawings, using proven details of fabrication and support. Use type of materials shown or specified for various components of work.
1.Form exposed work true to line and level with accurate angles and surfaces and straight sharp edges. Ease exposed edges to a radius of approximately 1/32 inch(0.80mm) unless otherwise shown. Form bentmetal corners to smallest radius possible without causing grain separation or otherwise impairing work.
2.Weld corners and seams continuously, complying with AWS recommendations. At exposed connections, grind exposed welds smooth and flush to match and blend with adjoining surfaces.
3.Form exposed connections with hairline joints, flush and smooth, using concealed fasteners wherever possible. Use exposed fasteners of type shown or, if not shown, Phillips flathead (countersunk) screws or bolts.
4.Provide for anchorage coordinated with supporting structure. Fabricate and space anchoring devices to provide adequate support for intended use.
5.Cut, reinforce, drill and tap miscellaneous metal work as indicated to receive finish hardware and similar items.
6.Galvanizing: Provide a zinc coating for those items indicated or specified to be galvanized.
7.Fabricate joints which will be exposed to weather in a manner
to exclude water or provide weep holes where water may accumulate.
B.Preparation for Shop Priming: Prepare uncoated ferrous metal surfaces to comply with minimum requirements indicated below for SSPC surface preparation specifications and environmental exposure conditions of installed metal fabrications:
1.SSPC-SP-3 Power Tool Cleaning; concealed steel.
C.Shop Primer: Immediately after surface preparation, apply steel primer paint in accordance with manufacturer's instructions and at a rate to provide dry film thickness of not less than 1.5 mils(0.038mm).Use priming methods that result in full coverage of joints, corners, edges and exposed surfaces.
1.Shop prime galvanized surfaces, unless otherwise noted, using primer paint recommended by paint manufacturer.
2.03ROUGH HARDWARE
A.Furnish bent or otherwise custom fabricated bolts, plates, anchors, hangers, dowels and other miscellaneous steel and iron shapes as required for framing and supporting woodwork, and for anchoring or securing woodwork to concrete or other structures.
B.Fabricate items to sizes, shapes and dimensions required. Furnish
malleable iron washers for heads and nuts which bear on wood
structural connections; elsewhere, furnish steel washers.
2.04LOOSE STEEL LINTELS
A.Provide loose structural steel lintels for all openings and recesses in masonry walls and partitions as required to support masonry above. Weld adjoining members together to form a single unit. Provide not less than 8 inch (200mm)bearing at each side of openings, unless otherwise indicated.
B.Finish: Steel lintels with hotdip galvanized finish in exterior walls; shop prime. Shop prime loose lintels in interior walls. Field paint all exposed lintels.
2.05MISCELLANEOUS STRUCTURAL STEEL MEMBERS
A.Properly mark and match-mark materials for field assembly. Fabricate for delivery sequence which will expedite erection and minimum field handling of materials.
B.Where finishing is required, complete assembly, including welding of units, before start of finishing operations. Provide finish surfaces of members exposed in final structure free of markings, burrs and other defects.
C.Connections: Weld or bolt shop connections, as indicated.
1.Bolt field connections, except where welded connections or other connections are indicated.
2.Provide high-strength threaded fasteners for principal bolted connections, except where unfinished bolts are indicated.
3.Provide unfinished threaded fasteners for only bolted connections of secondary framing members to primary members (including purlins, grits, and other framing members taking only nominal stresses) and for temporary bracing to facilitate erection.
D.High-Strength Bolted Construction: Install high-strength threaded fasteners in accordance with AISC "Specifications for Structural Joints using ASTM A 325 Bolts or A 490 Bolts".
E.Welded Construction: Comply with AWS Code for procedures, appearance and quality of welds, and methods used in correcting welding work.