How to Guide

The technical content of this literature is eective 6/6/14 and supersedes all previous information. 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
LIMITING HEIGHTS OVERVIEW
ProSTUD, like any interior drywall stud, may be used in a variety of applications including walls, ceilings, and sots. While
some conditions may require the expertise of a design professional, many assemblies can be selected based on tabulated data.
Using the diagrams below, locate the required assembly and follow the instructions for selecting the proper ProSTUD member.
Composite Assemblies
Composite limiting height data can be applied to walls where gypsum board is
installed on both flanges of the stud for the full height of the wall. ProSTUD
composite data is based on the 2003, 2006, 2009 and 2012 International
Building Code, and was tested and analyzed in accordance with the most recent
version of AC86 (2010). Composite limiting height tables for ProSTUD members
are available starting on page 10 of this catalog. In addition, a comprehensive
oering is available at clarkdietrich.com.
Chase Walls or Furred Walls
Chase and furred walls are common, but the conditions vary
greatly depending on the building requirements. While non-
composite tables may be used conservatively, when in doubt,
contact our Technical Services Hotline at 888-437-3244 for
chase wall designs.
Ceilings
Interior ceilings are often supported by ProSTUD framing. The
design criteria varies greatly based on the weight of the ceiling,
bracing, and support points. You'll find a partial listing of ceiling
span tables on page 18; visit clarkdietrich.com/ProSTUD for
more comprehensive data.
Non-Composite Assemblies
Non-composite conditions are common in all structures. When the gypsum board stops at the ceiling level, but the stud
continues to the deck, it is a non-composite condition. While there may be advantages to contacting Technical Services
or a Design Professional, many conditions can be covered by limiting heights tables shown in this catalog or at
clarkdietrich.com. When in doubt, call our complimentary Technical Services Hotline at 888-437-3244.
Non-Composite
FULLY BRACED
Unbraced length is less than Lu
Distance of unbraced length (Lu) can be found in the physical and structural properties starting on page 4.
< Lu
< Lu
< Lu
48" o.c. max.
Composite
Gypsum board
full height on both sides
Non-Composite
FULLY BRACED
Bracing spacing above
gypsum is less than Lu
Non-Composite
BRACED AT 48" o.c.
Gypsum board placed on only one side
WHICH ProSTUD
®
LIMITING HEIGHTS TABLE SHOULD I USE?
9