Amend_2_-_Attach_7_-_05_50_00_Metal_Fabrications_0002.pdf

DIVISION 05 – METALS

SECTION 05 50 00 – METAL FABRICATIONS

Klamath Falls N.F.H. 05 50 00-1 New National Fish Hatchery

PART 1 - GENERAL

1.01 DESCRIPTION OF WORK

A. Section includes:

1. Handrail including pipe, chain, quick link, and rod.

2. Concrete embedded stainless-steel fabrications

3. Expansion loop supports

4. Skid resistant roadway plate with rubrails

5. Other miscellaneous steel fabrications

B. Miscellaneous Steel Fabrications: In addition to these items specifically listed in item ‘A’ above, the work in this Section includes all items fabricated from steel and stainless-steel shapes, plates, bars, strips and pipes, which are not a part of structural steel or other metal systems in other sections of these specifications, whether specifically specified herein or not.

C. Related Sections

1. Section 03 30 00 - Cast-in-Place Concrete for installing anchor bolts, steel pipe sleeves, slotted-channel inserts, wedge-type inserts, and other items cast into concrete.

2. Section 13 12 00 - Metal Building Systems for metal work attached to Metal Building Systems.

3. Structural Drawing General Notes.

1.02 PERFORMANCE REQUIRMENTS

A. Thermal Movements: Allow for thermal movements from ambient and surface temperature changes acting on exterior metal fabrications by preventing buckling, opening of joints, overstressing of components, failure of connections, and other detrimental effects.

1. Temperature Change: 120 deg F (67 deg C), ambient; 180 deg F (100 deg C), material surfaces.

1.03 ACTION SUBMITTALS

A. Shop Drawings: Shall be submitted for approval prior to fabrication. Show fabrication and installation details for metal fabrications.

1. Include plans, elevations, sections, and details of all metal fabrications and their welding and connections. Show anchorage and accessory items.

Klamath Falls N.F.H. 05 50 00-2

B. Delegated-Design Submittals: For installed products indicated to comply with performance requirements and design criteria, including analysis data signed and sealed by the qualified Washington State professional engineer responsible for their preparation.

1.04 INFORMATION SUBMITTALS

A. Qualification Data: For qualified welding personnel.

B. Mill Certificates: Signed by manufacturers of stainless-steel certifying that products furnished comply with requirements.

C. Welding certificates.

D. Manufacturer’s literature for skid resistant coating, primer and bituminous paint, including material specifications and application instructions.

1.05 QUALITY ASSURANCE

A. Welding Qualifications: Qualify procedures and personnel according to the following:

1. AWS D1.1/D1.1M, "Structural Welding Code - Steel."

2. AWS D1.6, "Structural Welding Code - Stainless Steel."

1.06 PROJECT CONDITIONS

A. Field Measurements: Verify actual locations of walls and other construction contiguous with metal fabrications by field measurements before fabrication.

1.07 COORDINATION

A. Coordinate selection of shop primers with topcoats to be applied over them.

Comply with paint and coating manufacturers' written recommendations to ensure that shop primers and topcoats are compatible with one another.

B. Coordinate installation of anchorages and steel weld plates and angles for casting into concrete. 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.

PART 2 - MATERIALS

2.01 METALS, GENERAL

A. Metal Surfaces, General: Provide materials with smooth, flat surfaces unless otherwise indicated. For metal fabrications exposed to view in the completed

Klamath Falls N.F.H. 05 50 00-3

Work, provide materials without seam marks, roller marks, rolled trade names, or blemishes.

2.02 STAINLESS STEEL

A. Bolts and Nuts: ASTM A 193 Type 316L

B. Shapes, Channels, Angles, and Welded Headed Studs (WHS): ASTM A276 Type 316 L

2.03 FERROUS METALS

A. Steel Plates, Armor Plates, Shapes, and Bars: ASTM A 36/A 36M.

B. Steel Tubing: ASTM A 500, cold-formed steel tubing.

C. Steel Pipe: ASTM A 53/A 53M, standard weight (Schedule 40) unless otherwise indicated.

D. Cast Iron: Either gray iron, ASTM A 48/A 48M, or malleable iron, ASTM A 47/A 47M, unless otherwise indicated.

E. Welded Headed Studs: ASTM A 108.

2.04 FASTENERS

A. General: Unless otherwise indicated, provide Type 304 stainless-steel fasteners for exterior use and zinc-plated fasteners with coating complying with ASTM B 633 or ASTM F 1941 (ASTM F 1941M), Class Fe/Zn 5, at exterior walls. Select fasteners for type, grade, and class required.

B. Steel Bolts and Nuts: Regular hexagon-head bolts, ASTM A 307, Grade A (ASTM F 568M, Property Class 4.6); with hex nuts, ASTM A 563 (ASTM A 563M); and, where indicated, flat washers.

C. Stainless-Steel Bolts and Nuts: Regular hexagon-head annealed stainless-steel bolts, ASTM F 593 (ASTM F 738M); with hex nuts, ASTM F 594 (ASTM F 836M);

and, where indicated, flat washers; Alloy Group 1 (A1).

1. Dome head fasteners where indicated.

D. Anchor Bolts: ASTM F 1554, Grade 36, of dimensions indicated; with nuts, ASTM A 563; and, where indicated, flat washers.

1. Hot-dip galvanize or provide mechanically deposited, zinc coating where item being fastened is indicated to be galvanized

E. Plain Washers: Round, ASME B18.22.1 (ASME B18.22M).

F. Anchors, General: Anchors capable of sustaining, without failure, a load equal to six times the load imposed when installed in unit masonry and four times the load

Klamath Falls N.F.H. 05 50 00-4 imposed when installed in concrete, as determined by testing according to ASTM E 488, conducted by a qualified independent testing agency.

G. Cast-in-Place Anchors in Concrete: Either ASTM A 47/A 47M malleable iron or ASTM A 27/A 27M cast steel. Provide bolts, washers, and shims as needed, all hot-dip galvanized per ASTM F 2329.

H. Post-Installed Anchors:

1. Carbon-steel components zinc plated to comply with ASTM B 633 or ASTM F 1941 (ASTM F 1941M), Class Fe/Zn 5, unless otherwise indicated.

2. Material for Locations and Where Stainless Steel Framing or Anchors are Indicated: Alloy Group 1 (A1) stainless-steel bolts, ASTM F 593 (ASTM F 738M), and nuts, ASTM F 594 (ASTM F 836M).

2.05 SKID RESISTANT STEEL PLATE

A. Steel Plates and Rubrails: ASTM A 36/A 36M

B. Skid Resistant Coating: Durabak 18, Carbonyte Systems Skidguard, or approved equal.

2.06 MISCELLANEOUS METALS

A. Welding Rods 70 KSI Low Hydrogen

2.07 PRIMER

A. General: The following primers shall be used, unless specifically noted otherwise for the specific items listed in this Section.

1. Primer - Interior Concealed Steel, except as noted herein: Fabricator’s standard lead – and chromate-free, nonasphaltic, rust inhibiting primer, complying with LEED VOC limits.

B. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D 1187.

Color to be selected by the Owner through the submittal process.

2.08 FABRICATION, GENERAL

A. Shop Assembly: Preassemble items in the shop to greatest extent possible.

Disassemble units only as necessary for shipping and handling limitations. Use connections that maintain structural value of joined pieces. Clearly mark units for reassembly and coordinated installation.

B. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius of approximately 1/32 inch (1 mm) unless otherwise indicated.

Remove sharp or rough areas on exposed surfaces.

Klamath Falls N.F.H. 05 50 00-5

C. Form bent-metal corners to smallest radius possible without causing grain separation or otherwise impairing work.

D. Form exposed work with accurate angles and surfaces and straight edges.

E. Weld corners and seams continuously to comply with the following:

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.

F. Form exposed connections with hairline joints, flush and smooth, using concealed fasteners or welds where possible. Where exposed fasteners are required, use Phillips flat-head (countersunk) fasteners unless otherwise indicated. Locate joints where least conspicuous.

G. Fabricate seams and other connections that will be exposed to weather in a manner to exclude water. Provide weep holes where water may accumulate.

H. Cut, reinforce, drill, and tap metal fabrications as indicated to receive finish hardware, screws, and similar items.

I. Provide for anchorage of type indicated; coordinate with supporting structure.

Space anchoring devices to secure metal fabrications rigidly in place and to support indicated loads.

2.09 FINISHES, GENERAL

A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

B. Finish metal fabrications after assembly.

2.10 STEEL AND IRON FINISHES

A. All metals exposed to weather, other than stainless steel, shall be hot-dip galvanized.

B. Galvanizing: Hot-dip galvanize items as indicated to comply with ASTM A 153/A 153M for steel and iron hardware and with ASTM A 123/A 123M for other steel and iron products.

C. Shop prime steel items not indicated to be galvanized.

Klamath Falls N.F.H. 05 50 00-6

D. Preparation for Shop Priming: Prepare surfaces to comply with SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."

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.

1. Stripe paint corners, crevices, bolts, welds, and sharp edges.

PART 3 - EXECUTION

3.01 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 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, or similar construction.

3.02 ADJUSTING AND CLEANING

A. Touchup Painting: Immediately after erection, clean field welds, bolted connections, and abraded areas. Paint uncoated and abraded areas with the

Klamath Falls N.F.H. 05 50 00-7 same material as used for shop painting to comply with SSPC-PA 1 for touching up shop-painted surfaces.

1. Apply by brush or spray to provide a minimum 2.0-mil (0.05-mm) dry film thickness.

B. Touchup Painting: Cleaning and touchup painting of field welds, bolted connections, and abraded areas of shop paint are specified in Section 09 96 00 – High-Performance Coatings.

C. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing to comply with ASTM A 780.

1. Stripe paint corners, crevices, bolts, welds, and sharp edges.

END OF SECTION