How to Guide

The technical content of this literature is eective 4/9/15 and supersedes all previous information.Pub. No. CD-ProSTUD 4/15
clarkdietrich.com
The following drywall manufacturers conducted their own internal tests using
ProSTUD Drywall Framing products with their High-Impact, Abuse and Tile
Backer boards. You can find independent approval letters at clarkdietrich.com.
•
CertainTeed: GlasRoc
®
Tile Backer & ProRoc Extra AB with ProSTUD 20
•
G-P: DensShield-DensAmor
®
AR and IR with ProSTUD 20
•
National: Hi-Abuse
®
XP with ProSTUD 20
•
Temple Inland: ComfortGuard
®
AR and IR with ProSTUD 20
• FIBEROCK
®
AR with ProSTUD 20
Notes:
– Allowable screw connection capacities are based on Section E4 of the AISI S100-07 Specification.
– When connecting materials of different steel thicknesses or tensile strengths, use the lowest values. Tabulated values assume two sheets of equal thickness are connected.
– Screw shear and tension capacities were developed using published screw manufacturer data and evaluation reports available at the time of publication.
– Screw capacities are based on Allowable Strength Design (ASD) and include a safety factor of 3.0.
– When multiple fasteners are used, screws are assumed to have a center-to-center spacing of at least three times the nominal diameter (d).
– Screws are assumed to have a center-of-screw to edge-of-steel dimension of at least 1-1/2 times the nominal diameter (d) of the screw.
– Tension capacity is based on the lesser of pullout capacity in sheet closest to screw tip, or pullover capacity for sheet closest to screw head (using head diameter).
– Screw capacities are governed by a conservative estimate of screw capacity, not by sheet steel failure.
– For higher screw capacities, especially for screw strength, use specific screws from specific manufacturer. See manufacturer’s data for specific allowable values and
installation instructions.
ALLOWABLE SCREW DESIGN VALUES LBS
P roSTUD
®
WITH HIGHIMPACT AND HIGHABUSE BOARDS
2-Sided PulloverPullout / Shear
Pullout
Shear
CONNECTIONS
Member
designation
Thi
ckness
(mils)
Design
thickness
(in)
Yield
(ksi)
Ultimate
#6 Screw (0.138" Dia., 5/16" Head) #8 Screw (0.164" Dia., 5/16" Head) #10 Screw (0.190" Dia., 0.34" Head)
Shear,
lbs
1
-S
ide 2-Side
Pullout,
lbs
Shear,
lbs
1-Side 2-Side
Pullout,
lbs
Shear,
lbs
1-Side 2-Side
Pullout,
lbs
PDS125-15 15 0.0158 50 50 52 62 123 31 56 62 123 37 61 67 134 43
PDS125-19 19 0.0200 65 65 96 102 203 51 104 102 203 60 112 111 221 70
PDS125-30 30 0.0312 33 33 95 80 161 40 103 80 161 48 111 88 175 55
PDS125-33 33 0.0346 33 45 151 122 243 61 164 122 243 72 177 132 265 84
8