Assembly Usage Disclaimer

Roof Deck Constructions

See General Information for Roof Deck Constructions

Construction No. 227

August 05, 2019

Wind — Uplift — Class 90

Fire Not Investigated

    1. Metal Roof Deck Panels* — No. 26 MSG minimum thickness coated steel when liner panel (Item 7) is used and No. 24 MSG when liner panel is not used. Nominal width 24 in., nominal height at side ribs 3-1/16 in. optional pencil ribs may be formed in panel flat area. Panels continuous over two or more spans. End laps to occur near purlins with panels overlapped a minimum of 4 in. Side ribs to have a 3/8 in. diameter EPDM gasket. A bead of sealant may be used at panel end laps.
    2. Roof Deck Fasteners* (Panel Clips) — Two part assembly; base section No. 18 MSG thick, 4 in. wide, 2-3/8 in. high. Tab section No. 22 MSG thick 3 in. wide, formed to engage base.

    BUILDING PRODUCTS DEVELOPMENT INC (View Classification)"NC34506", "NC34507"

    3. Bearing Plate — Used under Roof Deck Fastener (Item 2), 4-1/2 in. by 4-1/2 in. by No. 16 MSG steel with a 5/16 in. diameter pilot hole in center. Yield strength to be 50,000 psi minimum.
    4. Fasteners(Screws) — Fasteners for Panel Clip(Item 2)-to-Min. No. 16 MSG, max. No. 12 MSG thick cold rolled steel Purlins(Item 9) to be No. 12-14 self-tapping, hex-head, plated steel screws without washers. Fasteners used for Panel Clip-to-Open Web Joists to be No. 1/4-28 self-drilling, self-tapping, hex-head, plated steel screws without washers. Minimum length for both types to be 1 in. longer than total thickness of Liner Panel (Item 7) and Rigid Insulation (Item 5). One fastener per clip used for each type. Fasteners used at panel end lap to be No. 14 by 3/4 in. long self-tapping hex-head plated steel screws with a separate 5/8 in. diameter steel washer and a bonded sealing washer.

    Fasteners used to attach liner panels to purlins to be No. 12 by 1-1/4 in. self-drilling, self-tapping hex-head plated steel with a 3/4 in. diameter steel washer and a sealing washer spacing to be 7-1/2 in. OC, located in every third valley. Fasteners used at liner panel, side laps to be same type as used at roof deck end laps. Spacing to be 20 in. OC.

    5. Foamed Plastic* (Rigid Insulation) — Supplied in 4 ft wide sheets — one or two layers. Thickness 3/4 in. min, 4 in. max. Top surface to be sealed with 2 in. wide pressure sensitive tape at all joints.

    THE DOW CHEMICAL CO (View Classification)Types Thermax Sheathing, Thermax Light Duty Insulation, Thermax Heavy Duty Insulation, Thermax Metal Building Board, Thermax White Finish Insulation, Thermax ci Exterior Insulation, Thermax XARMOR, TUFF-R™ ci Insulation, Thermax IH Insulation, Type Thermax Plus Liner Panel and Thermax Heavy Duty Plus (HDP)

    6. Vapor Barrier — Used when liner panel (Item No. 7) and No. 26 MSG thick metal roof deck panels (Item No. 1) are used, to be plastic sheeting 6 mil thick.
    7. Liner Panel — No. 28 MSG coated steel depth 3/8 in. pitch 2-1/2 in. width 33 in., side laps 1 corrugation wide. End laps 4 in. wide located over purlins.
    8. End — Lap Backing Plate — Not shown — Width approximately 22 in. length 5 in., No. 18 MSG minimum thickness formed to panel profile. Yield strength to be same as metal roof deck panels (Item No. 1).
    9. Purlins — No. 16 MSG minimum thickness steel (50,000 psi) minimum yield strength or min. Type K open web steel Joists. Spacing to be 60 in. OC when liner panel (Item No. 7) is used at 54 in. OC when liner panel is not used.
    10. Lateral Bracing — Not shown — As required.

    Refer to General Information, Roof Deck Constructions for items not evaluated.

    * Indicates such products shall bear the UL or cUL Certification Mark for jurisdictions employing the UL or cUL Certification (such as Canada), respectively.

Last Updated on 2019-08-05
TGKX.227 227 TGKX 117111001 CONSTRUCTION Active 20190805 20190805 100028941 629502067

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