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
Allowable Bending Capacity, 3-5/8" Stud
OVERVIEW
Gauge equivalent drywall framing must meet the minimum
performance requirements of conventional drywall framing as
defined by the Steel Framing Industry Association (SFIA) and the
Steel Stud Manufacturers Association (SSMA). The industry’s
“EQ” product of choice, ProSTUD,
®
employs roll-forming
and steel-making technology, exceeding the performance of
conventional drywall framing for allowable moment and screw
connection strength. When comparing drywall framing systems,
it is important to keep in mind Life Safety, System Performance
and Connections. The ProSTUD Drywall Framing System provides
peace of mind for all three important functions by providing the
right selection of products and product data for every application.
Connections
In addition to sucient member strength, it’s important to know how connections will perform. Connections can be
critical to the capacity and safety of an assembly, but they are also important for the attachment of cabinets, shelving,
handrails, and other accessories to steel framing. The tables below compare the screw performance of ProSTUD
to conventional drywall framing. This performance relationship to conventional studs can be applied to a variety of
fasteners and connections.
Along with connection capacity, conventional framing members are required to meet performance criteria for screw
spinout. ProSTUD was developed with screw performance in mind. High-strength steel, flange stiening grooves,
web embossments, and knurling features combine to provide the best performance per thickness, exceeding the
requirements of ASTM C645.
Life Safety
Life Safety is the primary concern and duty of all construction and
design professionals. For interior drywall framing members, bending
strength is the criteria most important to the strength of a wall
or ceiling. AISI defines bending or flexural strength by Allowable
Moment. The corresponding chart compares the bending strength
of ProSTUD and conventional drywall studs.
System Performance
Given ProSTUD’s strength and versatility, it’s important to know
the performance of the ProSTUD member under your project’s
specific criteria. This catalog will provide guidance in a variety of
assemblies and loading criteria, based on current building codes.
Additional data is available at clarkdietrich.com.
Allowable Moment (Ma, in-k)
ProSTUD 25
ProSTUD 20
25 Gauge
20 Gauge (Drywall)
4
3
2
1.69
3.10
1.48
3.08
1
0
WHAT IS AN EQUIVALENT EQ DRYWALL STUD?
Comparison of ProSTUD Drywall Framing
to Conventional Drywall Framing
#6 Screw Shear (Bearing) Values
Allowable Shear (lbs)
ProSTUD 25
0
60
90
120
30
31
#6 Screw Pullout Values
Allowable Pullout (lbs)
ProSTUD 25
ProSTUD 20
25 Gauge
60
0
45
30
15
20 Gauge (Drywall)
ProSTUD Drywall Framing
Conventional Drywall Framing
ProSTUD 25 15mil 25 Gauge 18mil
ProSTUD 20 19mil 20 Gauge 30mil
24
51
40
52
25 Gauge
96
44
95
ProSTUD 20
20 Gauge (Drywall)
2