JA-1 Specifications

DIVISION 05

CREEKSIDE PARK ELEMENTARY SCHOOL

Section 05500

Renovations & Additions

Metal Fabrications

ASD Project No. 180-701

PART 1 GENERAL

1.01 DESCRIPTION OF WORK

A. Miscellaneous metal parts, assemblies specified herein, shown or required to complete the work. Furnish and install supplementary parts, fastenings, anchors, closures, and hardware required to complete installation.

B. Coordinate work under this section with work specified under Structural Steel section in order to avoid overlapping work. It should generally be considered that only items which directly support the structure and/or its components are "structural". All other shop fabricated fixtures and “service items” are considered "metal fabrications".

C. Included, but not limited to, pipe railings, pipe bollards, ladders and all shapes, formed and bent plate over 10 gauge welded or bolted to studs or other substrate for attachment of or backing for items of this and any other section of these specifications unless specifically called out as provided with such item of work.

1.02 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

A. Federal Specification, specific issues as called for.

B. American Society for Testing and Materials (ASTM)

1. ASTM A27

Steel Castings, Carbon, for General Application.

2. ASTM A36

Specifications for Structural Steel.

3. ASTM A47

Ferritic Malleable Iron Castings.

4. ASTM A53

Pipe, Steel, Black and Hot-Dipped, Zinc Coated, Welded and Seamless.

5. ASTM A153

Zinc Coating (Hot-Dip) on Iron and Steel Hardware.

6. ASTM A283

Low and Intermediate Tensile Strength Carbon Steel Plates.

7. ASTM A307

Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength

8. ASTM A501

Hot-Formed Welded and Seamless Carbon Steel Structural Tubing.

9. ASTM A525

General Requirements for Steel Sheets, Zinc-Coated (Galvanized) by Hot-Dip Process.

10. ASTM A526

Steel Sheet, Zinc-Coated (Galvanized) by Hot-Dip Process, Commercial Quality.

11. ASTM A663

Steel Bars, Carbon, Merchant Quality, Mechanical Properties.

12. ASTM B221

Aluminum Shapes & Plates (Alloy ANSI 6061-T6)

C. International Conference of Building Officials (ICBO)

1. Uniform Building Code and Standards, Applicable Chapters.

D. Military Specifications (Mil. Spec.)

1. Mil-P-21035 (Ships) Paint, High Zinc Dust Contest, Galvanizing Repair.

E. Steel Structures Painting Council (SSPC)

1. SSPC-Paint 11 Red Iron Oxide, Zinc Chromate, Raw Linseed Oil and Alkyd Paint.

F. Uniform Building Code (UBC)

1. 1997 Chapter 20 Division II – Design Standard for Aluminum Structure.

1.03 SUBMITTALS

A. Comply with Section 01300.

B. Submit shop drawings, including layout, dimensions of the work, detail sections, gauges, and type, number, size, and spacing of connections and fasteners of all fabricated members.

1.04 QUALITY ASSURANCE

A. 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. Government shall be granted access to work under fabrication in the shop for inspection purposes, as required.

PART 2 PRODUCTS

2.01 METAL SURFACES, GENERAL

A. For fabrication of 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.

2.02 STEEL FABRICATIONS

A. Plates, Shapes, and Bars: ASTM A36.

B. Plates, Bent or Cold Formed: ASTM A283, Grade C.

C. Bars and Bar-Size Shapes: ASTM A663.

D. Galvanized Carbon Steel Sheets: ASTM A526, with ASTM A525, A 60 Zinc Iron Alloy coating.

E. Steel Pipe: ASTM A106; type as selected; Grade B; black finish unless galvanizing is required; standard weight (Schedule 40), unless otherwise indicated.

F. Steel Grating Bottom of Trough: Smooth surface grating. ASTM A36.

G. Steel Safety Grating Raking Platform: ASTM A36.

2.03 ALUMINUM FABrications

A. Rolled or extruded standard structural shapes and bars 6061-T6 Alloy type (per ANSI and UBC 1997 Table 20-II-A)

B. Fabricate items in accordance with UBC 1997 Section 2011.1 thru 2011.4

C. Welds and filler materials shall be in accordance with UBC Section 2012.

2.04 ACCESSORIES

A. Concrete Inserts: Threaded or wedge type, galvanized ferrous castings, either malleable iron ASTM A47 or cast steel ASTM A27. Provide bolts, washers and shims as required, hot-dip galvanized, ASTM A153.

B. Fasteners: Provide hot dipped galvanized fasteners for exterior use or where built into exterior walls. Select fasteners for the type, grade, and class required.

1. Bolts and Nuts: Regular hexagon head type, ASTM A307, Grade A.

2. Lag Bolts: Square head type, FS FF-B-561.

3. Plain Washers: Round, carbon steel, FS FF-W-92.

4. Concrete Anchorage Devices: Expansion shields, FS FF-S-325.

5. Toggle Bolts: Tumble-wing type, FS FF-B-588, type, class and style as required.

6. Lock Washers: Helical spring type carbon steel, FS FF-W84.

2.05 GALVANIZING

A. Galvanize after fabrication all exterior ferrous metal and items specifically identified, including all parts, bolts, nuts, washers and other attachments.

B. Clean, prepare, galvanize by hot-dip method in accordance with the Hot-Dip Galvanizers Association standard specification.

2.06 PAINT

A. Metal Primer Paint: Red iron oxide, zinc chromate, raw linseed oil, or alkyd paint by SSPC Paint 11.

B. Primer selected shall be compatible with finish coats of paint. Coordinate selection of primer with finish paint requirements specified in Section 09900.

C. Galvanizing Repair Paint: High zinc dust content paint for regalvanizing welds in galvanized steel, complying with Mil. Spec. MIL-P-21035 (Ships).

PART 3 EXECUTION

3.01 FABRICATION

A. Use materials of size and thickness shown or, if not shown, of required size and thickness to produce strength and durability in finished product. Verify and 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.

B. 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", unless otherwise shown. Form bent metal corners to smallest radius possible without causing grain separation or otherwise impairing work.

C. 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.

D. Make exposed joints close fitting, flush and smooth, and cut off exposed bolts and screws, flush with adjacent metal. Cut, drill, punch and tap as required for the installation and attachment of other work to miscellaneous metal work.

E. Metal work built in with concrete or masonry shall be formed for anchorage, or be provided with suitable anchors, expansion shields, or other anchoring devices shown or required. Furnish such metal work in ample time for setting and securing in place.

F. Provide for anchorage of type shown, coordinated with supporting structure. Fabricate and space anchoring devices to provide adequate support for intended use. Use exposed fasteners of type shown or approved equal.

G. Cut, reinforce, drill and tap miscellaneous metal work as indicated to receive finish hardware and similar items.

H. Make shop assemblies in the largest possible sections in order to reduce field connections to a minimum. Give all work a trial fit in the shop and mark for final assembly in the field. Provide alignment and splice plates for accurate field fit.

3.02 SPECIFIC ITEMS

A. Basically all major miscellaneous and ornamental iron items are detailed in the contract drawings. All fabrications shall be in accordance with these details and National Association of Architectural Metal Manufacturer's Standards. The following list contains only a brief description, it shall not be interpreted to be complete and/or represent the limit of performance

B. Smooth steel bar grating shall be supplied for the bottom of the debris trough to allow ease of shoveling. Grating shall be rated for 100 pounds per square foot and be galvanized steel. Maximum width of bars shall be ½ inch. Maximum spacing between longitudinal bars shall be ½ inch and maximum height shall be 2 inches. The top of the transverse bars shall be a minimum of one quarter inch below the top surface of the longitudinal bars. Alaska Steel manufactures grating which complies with this specification.

C. Safety Grating shall be supplied for walking surface adjacent to the debris trough. Grating shall be rated for 100 pounds per square foot and be galvanized steel. Maximum open area for grating shall be 49% and maximum height shall be 2 inches (flush with top of headwall). Alaska Steel manufactures grating which complies with this specification.

D. Rough Hardware:

1. Furnish bent or otherwise custom fabricated bolts, plates, anchors, hangers, dowels, and other miscellaneous steel and iron shapes as required for framing and for anchoring or securing woodwork to concrete or other structures. Straight bolts and other stock rough hardware items are specified in Division 6.

2. Manufacture or fabricate items of sizes, shapes and dimensions required.

3.03 INSTALLATION

A. Install all items of miscellaneous and architectural metal as shown on drawings, and installer must examine the areas and conditions under which miscellaneous metal items are to be installed and notify the Contractor in writing of missing backing or blocking and any other conditions detrimental to the proper and timely completion of the work. Do not proceed with the work until such conditions have been corrected in a manner acceptable to the installer.

B. Furnish setting drawings, diagrams, templates, instructions, and directions for installation of anchors, which are to be embedded in concrete or require backing. Coordinate and schedule work of this Section with work of other trades. Furnish anchors, sockets, fastenings, and other miscellaneous items to be embedded in concrete or required for securing metal work to other construction so as not to delay job progress.

C. Except where otherwise specified for a particular item of work or for built-in work, metal work shall be fastened to concrete with adhesive anchor bolts. Fastening to wood plugs will not be permitted. Drill holes for bolts to the exact diameter of bolt, using a rotary drill. Screws shall be threaded full length to the head of the screw.

D. Install work in locations shown, plumb, level, and in line with adjacent materials where required. Fastenings shall be as indicated on the Drawings, specified herein, or as shown on the shop drawings.

E. Provide connecting members needed for properly securing the work to concrete or structural framing; including bolts, rivets, machine screws, rods, hangers, inserts, sleeves, anchors, expansion bolts, washers, and other items as required.

F. Leave work exposed to view, clean, smooth and neatly finished.

G. Include supplementary parts necessary to complete each item, though such work is not definitely shown or specified.

H. Touch-up marred and abraded galvanizing on exposed surfaces after erection in the field.

I. Protect finished surfaces against damage during subsequent construction operations, and remove such protection at time of substantial completion.

END OF SECTION

497009 05500-5

Repair Cooling Pond

Solicitation Number: FA5004-09-R-C015

Clear Air Force Station, Alaska

Attachment JA-1 Specifications

Project No. DXEB 92-1001

Miscellaneous Metals

Section 05500-2