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USG Structo-Crete Structural Concrete Panel User Manual

Structo-crete, Structural concrete panel, Recommended fasteners for cold-formed steel

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USG tested for fastening S

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structural concrete panel to cold-formed steel. The allowable

uniform gravity loads and the diaphragm design loads tabled in the ICC-ES Evaluation Report ESR-1792
were generated from tests using the Structural Concrete Panel Screw 8 x 1-5/8" with GrabberGard – Collated
(Grabber screw item # CHS8158JBWG2). This fastener complies with all of the requirements of Section 3.3
of ICC-ES ESR-1792 and is the fastener recommended by USG for the application of S

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structural

concrete panel as the subfloor on cold-formed steel.

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ICC-ES Evaluation Report 3.3 Fasteners:

ESR-1792

The panels must be fastened to the steel floor framing with self-drilling, self-tapping screws complying with

ASTM C954 and C1513. The screws must be No. 8-18 size [0.164 inch (4 mm)diameter] by 1-5/8 inches
(41 mm) long with a minimum 0.36-inch-diameter (9.1 mm) bugle head.

Note Grabber

®

Construction Products used to describe the CHS8158JBWG2 screw as a bugle head (or trumpet head), and so the

S

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ICC-ES ESR-1792 report states “bugle head.” Grabber now designates the screw head as a thin wafer head. Although

the nomenclature has changed, the shape of the fastener has remained the same.

Fasteners for Cold-Formed Steel

USG recommends the following screw for fastening

S

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structural concrete panels to cold-formed

steel:

Structural Concrete Panel Screw 8 x 1-5/8"
with GrabberGard – Collated

Item Number:

CHS8158JBWG2

Size:

#8 (do not use a larger size unless specifically

specified by the structural engineer)

Minimum Length:

1-5/8 in. (minimum)

Finish:

GrabberGard (required)

Extras:

Winged drill, "reamer nibs" under head

(for countersink)

Note In accordance with ICC ESR-1792, the minimum screw pattern
is 6 inches o.c. along the perimeter of the panels and 12 inches o.c.
in the field of the panels. The structural engineer should specify the
recommended pattern for each application.

Structo-Crete

Structural Concrete Panel

Tip Sheet

Recommended Fasteners for Cold-Formed Steel

#3 Winged Drill

Wafer Head

LOX #2