SECTION 05500

METAL FABRICATIONS

PART 1 GENERAL

SECTION INCLUDES

Shop fabricated [ferrous metal] [________________] items, [galvanized] [and] [prime painted].

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section 03300 - Cast-In-Place Concrete: Placement of metal fabrications in concrete.

Section [______-____________]: Placement of metal fabrications in [precast] [post tensioned] [_____________] concrete.

Section [04300 - Unit Masonry System] [_____-__________]: Placement of metal fabrications in masonry.

RELATED SECTIONS

Section [______-____________]: Structural steel [column] [________________] anchor bolts.

Section [______-____________]: Structural [joist] [________] bearing [plates] [________], including anchorage.

Section [______-____________]: Bearing [plates] [angles] [and] [________] for metal deck bearing, including anchorage.

Section 05520 - Handrails and Railings.

Section 09900 - Painting: Paint finish.

REFERENCES

ASTM A36 - Structural Steel.

ASTM A53 - Hot-Dipped, Zinc-coated Welded and Seamless Steel Pipe.

ASTM A123 - Zinc (Hot-Galvanized) Coatings on Products Fabricated From Rolled, Pressed and Forged Steel Shapes, Plates, Bars, and Strip.

ASTM A153 - Zinc Coating (Hot-Dip) on Iron and Steel Hardware.

ASTM A283 - Carbon Steel Plates, Shapes, and Bars.

ASTM A307 - Carbon Steel Externally Threaded Standard Fasteners.

ASTM A325 - High Strength Bolts for Structural Steel Joints.

ASTM A386 - Zinc-Coating (Hot-Dip) on Assembled Steel Products.

ASTM A500 - Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Round and Shapes.

ASTM A501 - Hot-Formed Welded and Seamless Carbon Steel Structural Tubing.

ASTM B177 - Chromium Electroplating on Steel for Engineering Use.

AWS A2.0 - Standard Welding Symbols.

AWS D1.1 - Structural Welding Code.

SSPC - Steel Structures Painting Council.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate profiles, sizes, connection attachments, reinforcing, anchorage, size and type of fasteners, and accessories. Include erection drawings, elevations, and details where applicable.

Indicate welded connections using standard AWS A2.0 welding symbols. Indicate net weld lengths.

QUALIFICATIONS

Prepare Shop Drawings under direct supervision of a Professional Structural Engineer experienced in design of this work and licensed [at the place where the Project is located.] [in the State of [____________].]

Welders' Certificates: Submit under provisions of Section [01300] [________], certifying welders employed on the Work, verifying AWS qualification within the previous 12 months.

FIELD MEASUREMENTS

Verify that field measurements are as [indicated on [Drawings] [shop drawings].] [instructed by the manufacturer.]

PART 2 PRODUCTS

MATERIALS

Steel Sections: ASTM [A36.] [____.]

Steel Tubing: [ASTM A500, Grade B.] [ASTM A501.]

Plates: [ASTM A283.] [________________.]

Pipe: [ASTM A53, Grade [B] [____] Schedule [40] [____]] [________________].

Fasteners:	[________________.]

Bolts, Nuts, and Washers: ASTM [A325] [A307] [galvanized to ASTM A153 for galvanized components].

Welding Materials: AWS D1.1; type required for materials being welded.

Shop and Touch-Up Primer: [SSPC 15, Type 1, red oxide.] [________.]

****** [OR] ******

Touch-Up Primer for Galvanized Surfaces: Zinc rich type.

FABRICATION

Fit and shop assemble in largest practical sections, for delivery to site.

Fabricate items with joints tightly fitted and secured.

Continuously seal joined members by [intermittent welds and plastic filler.] [continuous welds.]

Grind exposed joints flush and smooth with adjacent finish surface. Make exposed joints butt tight, flush, and hairline. Ease exposed edges to small uniform radius.

Exposed Mechanical Fastenings: Flush countersunk screws or bolts; unobtrusively located; consistent with design of component, except where specifically noted otherwise.

Supply components required for anchorage of fabrications. Fabricate anchors and related components of same material and finish as fabrication, except where specifically noted otherwise.

FINISHES

Prepare surfaces to be primed in accordance with SSPC SP [2.] [____.]

****** [OR] ******

Clean surfaces of rust, scale, grease, and foreign matter

prior to finishing.

Do not prime surfaces in direct contact with concrete or where field welding is required.

Prime paint items with [one coat.] [two coats.]

Galvanize in accordance with ASTM A123, structural steel members. [Provide minimum [1.25] [____] oz/sq ft ([380] [____] g/sq m) galvanized coating].

****** [OR] ******

Galvanized items to minimum [1.25] [2.0] [____] oz/sq ft ([380] [360] [____] g/sq m) zinc coating [in accordance with ASTM A386.]

Chrome Plating: ASTM B177, [________] weight, nickel-chromium alloy, [satin] [polished] finish.

PART 3 EXECUTION

EXAMINATION

Verify that field conditions are acceptable and are ready to receive work.

Beginning of installation means erector accepts existing conditions.

PREPARATION

Clean and strip primed steel items to bare metal where site welding is required.

Supply items required to be [cast into concrete] [or] [embedded in masonry] with setting templates, to appropriate sections.

INSTALLATION

Install items plumb and level, accurately fitted, free from distortion or defects.

Allow for erection loads, and for sufficient temporary bracing to maintain true alignment until completion of erection and installation of permanent attachments.

Field weld components indicated on [Drawings.] [shop drawings.]

Perform field welding in accordance with AWS D1.1.

Obtain Architect/Engineer approval prior to site cutting or making adjustments not scheduled.

After erection, prime welds, abrasions, and surfaces not [shop primed] [galvanized], except surfaces to be in contact with concrete.

ERECTION TOLERANCES

Maximum Variation From Plumb: [1/4] [____] inch ([6] [____] mm) per story, non-cumulative.

Maximum Offset From True Alignment: [1/4] [____] inch ([6] [____] mm).

SCHEDULE

The Schedule is a list of principal items only. Refer to Drawing details for items not specifically scheduled.

Telescopic Steel Columns: Steel, [3] [____] inch ([75] [____] mm) diameter, [6] [____] to [9] [____] feet [1.83] [____] to [2.75] [____] m); prime paint finish.

[________________] Ladder: Steel, of [3/8 x 2] [__ x __] ([9 x 50] [__ x __] mm) side rails spaced at [20] [____] inches ([500] [____] mm); rungs of [one] [____] inch ([25] [____] mm) diameter [solid] [tubular] rod spaced [12] [____] inches ([300] [____] mm) on center; space rungs [7] [____] inches ([175] [____] mm) from wall surface; with steel mounting brackets and attachments; [prime paint] [galvanized] finish.

Bumper [Posts] [and Guard Rails]: As detailed; [prime paint] [galvanized] finish.

Bollards: Steel pipe, concrete filled, crowned cap, as detailed; [prime paint] [galvanized] finish.

[Joist] [________] Hangers: Joist strap anchors, fabricated with [____] gage ([____] mm) steel; [galvanized] [prime paint] finish.

Ledge and Shelf Angles, [Channels] [and] [Plates] Not Attached to Structural Framing: For support of [metal decking] [joists] [masonry] [________]; [prime paint] [galvanized] [natural] finish.

Lintels:	As detailed; [prime paint] [galvanized] [descaled mill] finish.

Door Frames for Overhead Door Openings [and Wall Openings]: [Channel] [Angle] [________] sections; [prime paint] [galvanized] finish.

[Foot Scrapers] [Mud and Foot Grilles] [including pans]; As detailed; [galvanized] [prime paint] [[satin] polished] chrome plated] finish.

Hoistway Divider Beams: [Beam] [________] sections; [prime paint] [________________] finish.

Toilet Partition Suspension Members:	[Channel] [Angle] [________] sections; [prime paint] [________] finish.

END OF SECTION