LGSEA has several screw tables with shear, tension, pullout and pullover values, but likely if you use screws to attach to a WF beam it will be governed in uplift by pullover of the deck, not a failure of the screw. I would anticipate 18ga should give you some pretty good pullover values and may push the limit of the screw itself.
Not sure about ICC approvals...
Andrew Kester, PE
Florida
-------------------------
I don't know about ICC approval but United Steel Deck catalog discusses
screws along with welds. I would think screws would be acceptable if PAF's
are. The screws have a large head than many of PAF's. The PAF's sometimes
bounce rather than penetrate according to one craftsman (operator issue.)
Hilti and the Steel Stud Manufacturers have values for screws and welds for
light gage metal thicknesses to "heavy gage" steel.
Glenn C. Otto, P.E.
A Structural Engineer, P.C.
Virginia Beach, VA 23454
www.astructuralengineeronline.com
-----Original Message-----
From: Drew Morris [dmorris@bbfm.com]
Sent: Friday, November 20, 2009 6:09 PM
To: SEAINT
Subject: Steel roof deck attached using screws
Does anyone know of a steel roof deck manufacturer (1 1/2" 18 ga) that
has ICC approval for steel deck fastened to W beams using screws? I can
find reports of decks attached with spot welds and powder actuated
fasteners.
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