SECTION 05311

STEEL ROOF DECK

PART 1 GENERAL

SECTION INCLUDES

Steel roof deck and accessories.

Formed steel [cant strips][.] [and] [_______________.]

Framing for openings up to and including [18] [_____] inches ([450] [_____] mm).

Bearing plates and angles.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [_____-__________]: Installation of anchors for bearing [plates] [and] [angles] cast in concrete.

Section [_____-__________]: Installation of anchors for bearing [plates] [and] [angles] embedded in masonry.

Section [_____-__________]: Installation of acoustic deck insulation strips.

RELATED SECTIONS

[Section 03300 - Cast-in-Place Concrete: Concrete topping over metal roof deck.]

Section 05120 - Structural Steel: Structural framed openings larger than [18] [_____] inches ([450] [_____] mm).

Section 05210 - Steel Joists: Structural framed openings larger than [18] [_____] inches ([450] [_____] mm).

Section 05313 - Steel Floor Deck.

Section [_____-__________]: Spray applied fireproofing applied to decking

Section [_____-__________]: Reinforcement pans with roof drain hub assemblies.

REFERENCES

AISI - Specification for the Design of Cold-Formed Steel Structural Members.

ASTM A36 - Structural Steel.

ASTM A446 - Steel Sheet, Zinc-Coated (Galvanized) by the

Hot-Dip Process, Structural (Physical) Quality.

ASTM A525 - Steel Sheet, Zinc-Coated, Galvanized by the Hot-Dip Process.

ASTM A611 - Steel, Cold-Rolled Sheet, Carbon, Structural.

AWS D1.1 - Structural Welding Code.

SDI - Design Manual for Composite Decks, Form Decks, Roof Decks.

PERFORMANCE REQUIREMENTS

Design metal decking in accordance with SDI Design Manual for Composite Decks, Form Decks, Roof Decks.

Calculate to structural [working] [limit] stress design and maximum vertical deck deflection of [1/240.] [1/180.] [_____.]

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

Design deck to a section modulus of [_____] and a maximum vertical deck deflection of [1/240.] [1/180.] [_____.]

Lateral deflection of diaphragm shall not exceed [1/500] [_____] of the [height of the wall.] [story height.]

SUBMITTALS

Submit under provisions of Section [01300.] [01340.]

Shop Drawings: Indicate decking plan, support locations, projections, openings [and reinforcement], pertinent details, and accessories. [Indicate temporary shoring of decking where required.]

Product Data: Provide deck profile characteristics and dimensions, structural properties, finishes, and [____________________.]

Manufacturer's Installation Instructions: Indicate specific installation sequence, special instructions, and [____________________.]

QUALIFICATIONS

Installer: Company specializing in performing the work of this Section [with minimum [_______] years [documented] experience.] [approved by manufacturer.]

Design deck layout, spans, fastening, joints, and [__________] 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 [_______________.]]

DELIVERY, STORAGE, AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01620.]

Cut plastic wrap to encourage ventilation.

[Separate sheets and] store decking on dry wood sleepers; slope for positive drainage.

FIELD MEASUREMENTS

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

PART 2 PRODUCTS

MANUFACTURERS

[______________________________] Product [_____________.]

[______________________________] Product [_____________.]

[______________________________] Product [_____________.]

Substitutions: Under provisions of Section [01600.] [01630.]

MATERIALS

Sheet Steel: ASTM A446, Grade [B] [A] Structural Quality; with [G30] [G60] [G90] [G115] galvanized coating conforming to ASTM A525.

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

Sheet Steel: ASTM A446, Grade [B] [A] Structural Quality; with [G90] [_____] galvanized coating, precoated with [silicone] [__________] coating of [__________] color[.] [as selected from manufacturer's standard range.]

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

Sheet Steel: ASTM A611, Grade [C] [_____], unfinished.

Bearing [Plates] [Angles]: ASTM A36 steel, [unfinished.] [_______________.]

Welding Materials: AWS D1.1.

Touch-Up Primer: [Zinc chromate] [Red oxide] type.

ACCESSORIES

Flute Closures: Closed cell [foam rubber] [__________], [one] [___] inch ([25] [___] mm) thick; profiled to fit tight to the decking.

Acoustical Insulation: Glass fiber type, minimum [1.1] [_____] lb/cu ft ([18] [_____] kg/cu m) density; profiled to suit decking.

FABRICATION

Metal Decking: Sheet steel, configured as follows:

Span Design:	[Multiple] [Double] [Single]

Minimum Metal Thickness

(Excluding Finish):	[22] [20] [____] gage ([0.8]

[0.9] [____] mm)

Nominal Height:	[1-1/2] [1-5/8] [____] inch([38] [43] [____] mm), fluted profile [to SDI [NR] [IR] [WR]]

Formed Sheet Width:	[24] [32] [____] inch ([600]

[800] [____] mm)

Side Joints:	[Lapped] [Lock seam]

[__________]

Flute Sides:	[Plain vertical face][Diagonally ribbed for improved concrete bond]

Ribbed Metal Deck: Sheet steel, [unfinished] [galvanized] [prime coated], configured as follows:

Minimum Metal Thickness

(Excluding Finish):	[____] gage ([____] mm)

Height of 'V' Rib:	[____] inch ([____] mm)

Formed Sheet Width:	[24] [32] [____] inch ([600]

[800] [____] mm)

Side Joints:	[Lapped seam] [__________]

Bridging Profile	[___x___] inch ([___x___] mm)size below pan elevation to permit continuous rebar placement

Acoustic Decking: Sheet steel, plain vertical face perforated with 1/8 inch (3 mm) diameter holes staggered

3/8 inch (10 mm) oc, configured as follows:

Span Design:	[multiple] [double] [single]

Minimum Metal Thickness

Excluding Finish:	[____] gage ([____] mm)

Nominal Height:	[____] inch([____] mm)

Formed Sheet Width:	[24] [32] [____] inch ([600]

[800] [____] mm)

Side Joints:	[lock seam] [__________]

Corrugated Forms: Minimum [___] gage ([___] mm thick) sheet steel, [___] inch ([___] mm) high, [___] inch ([___] mm wide) sheets; lapped edges, [vent clips] [deformed ends] for ventilation of concrete.

Metal Closure Strips, [Wet Concrete Stops,] Cover Plates, [Cant Strips,] and Related Accessories: [22] [20] [___] gage ([0.8] [0.9] [___] mm thick) [galvanized] sheet steel; of profile and size [as indicated.] [required.]

Fabricate roof sump pan of [14] [___] gage ([1.8] [___] mm thick) sheet steel, flat bottom, sloped sides, recessed 1-1/2 inches (38 mm) below roof deck surface, bearing flange 3 inches (75 mm) wide, sealed watertight.

Cant Strips: Formed sheet steel, [___] gage ([___] mm) thick, 45 degree slope, [3-1/2] [_____] inch nominal width and height, flange for attachment.

Fasteners: [Stainless] [Galvanized hardened] steel, steel-tapping[,][.] [painted to match precoated deck color.]

Weld Washers: Mild steel, uncoated, [3/4] [___] inch ([19] [___] mm) outside diameter, [1/8] [___] inch ([3] [___] mm) thick.

PART 3 EXECUTION

EXAMINATION

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

Beginning of installation means installer accepts existing conditions.

INSTALLATION

Erect metal decking in accordance with [SDI Design Manual for Composite Decks, Form Decks, Roof Decks.] [manufacturer's instructions.]

Bear decking on [masonry] [concrete] [wood] support surfaces with [4] [6] inch ([100] [150] mm) minimum bearing. Align and level.

Bear decking on steel supports with [1-1/2] [3] inch ([38] [75] mm) minimum bearing. Align and level.

Fasten [ribbed] deck to steel support members at ends and intermediate supports with [fusion welds through weld washers] [mechanical fasteners] at [12] [___] inches ([300] [___] mm) oc maximum, parallel with the deck flute and at [each] [every other] transverse flute.

Weld in accordance with AWS D1.1.

Mechanically [clinch] [fasten] male/female side laps at [24] [___] inches ([600] [___] mm) oc maximum.

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

Weld male/female side laps at [18] [___] inches ([450] [___] mm) oc maximum.

Reinforce steel deck openings from 6 to [18] [___] inches (150 to [450] [___] mm) in size with [2 x 2 x 1/4] [__________] inch ([50 x 50 x 6] [__________] mm) steel angles. Place angles perpendicular to flutes; extend minimum two flutes beyond each side of opening and [fusion weld] [mechanically attach] to deck at each flute.

Install 6 inch (150 mm) minimum wide sheet steel cover plates, of same thickness as decking, where deck changes direction. [Fusion weld] [Mechanically attach] [12] [___] inches ([300] [___] mm) oc maximum.

To contain wet concrete, install stops at roof edge upturned to top surface of slab. Provide stops of sufficient strength to remain stationary under wet concrete without distortion.

Install sheet steel closures and angle flashings to close openings between deck and walls, columns, and openings.

Install [single] [double] row of foam flute closures [above walls and partitions perpendicular to deck flutes][.] [and] [____________________.]

Position roof sump pans with flange bearing on top surface of deck. Fusion weld at each deck flute.

Place metal cant strips in position and [fusion weld.] [mechanically attach.]

Immediately after welding deck and other metal components in position, coat welds, burned areas, and damaged surface coating, with touch-up prime paint.

END OF SECTION