Instructions / Assembly
The technical content of this literature is eective 5/31/12 and supersedes all previous information.  Pub. No. CD-Full Line 5/12
Overview
OVERVIEW
clarkdietrich.com
STEEL THICKNESS
The steel thickness of a product or component is 
referenced in terms of gauge or mils. The mil thickness 
measures the uncoated base metal material, and is a key 
contributor to the strength of the product.
Note: All products comply with ASTM standards and federal 
specifications as shown in the Code Approvals and Performance 
Standards in the back of this catalog. Minimum thickness is 95% of 
the design thickness, per AISI code. One mil is equivalent to 1/1000 
(0.001) of an inch. So, a 20 gauge stud measuring the minimum 
uncoated base metal at 0.030 inches is 30mils thick. 
ClarkDietrich thickness identification by color coding
Member Thickness  Design  Min.  Color
mils  gauge  thickness  thickness code
18 25 0.0188" 0.0179" None
27 22 0.0283" 0.0269" Black
30 DW20 0.0312" 0.0296" Pink
33 20 0.0346" 0.0329" White
43 18 0.0451" 0.0428" Yellow
54 16 0.0566" 0.0538" Green
68 14 0.0713" 0.0677" Orange
97 12 0.1017" 0.0966" Red
118 10 0.1242" 0.1180" Blue
ClarkDietrich ProSTUD
®
Drywall framing system thickness
Member      Design Min.  Color
gauge  Mils ksi  thickness  thickness  code
ProSTUD25 15 70 0.0158 0.0150 None
ProSTUD20 19 65 0.0200 0.0190 Pink
ProSTUD30 30 33 0.0312 0.0300 White
ProSTUD33MIL 33 33 0.0346 0.0329 White
ProTRAK25and20=50ksiProTRAK30miland33mil=33ksi
PRODUCT LABELING
Skids are easily identified with master skid labels that 
display product, gauge, size, length, piece count, yield 
strength and any special skid markings specified at the 
time of order. Individual inkjet labeling (including company 
name, product, size, length, gauge, coating and yield 
strength) or embossing is also provided on many of our 
structural framing members. UPC bar coding is also 
available for certain products.
METRIC SPECIFICATIONS
At your request, ClarkDietrich will provide “soft” metric 
conversions on its products and systems to help specifiers 
match metric design sizes. In addition, some products 
are available with hard metric dimensions from selected 
manufacturing facilities.
STANDARDS & SPECIFICATIONS
All structural properties are developed in accordance with 
the American Iron and Steel Institute’s “Specification for 
the Design of Cold-Formed Steel Structural Members.”
GENERAL NOTES
The data contained in this catalog is intended to be 
used as a general guideline only and does not replace 
the judgments and designs of a qualified architect and/
or engineer. This catalog does not provide load data 
necessary for building design. Load capacities, limiting 
heights, physical and structural properties and span 
data for ClarkDietrich structural framing can be found 
at www.clarkdietrich.com.
Product, application renderings and photographs are 
provided as a tool to show the general intent of the 
framing or finishing application only. These renderings or 
photographs may or may not be applicable to a specific 
project. They do not replace or supersede the architect 
or engineer of record, ASTM guidelines, national or local 
building codes or approved industry standards. 
ClarkDietrich Building Systems reserves the right to 
change or modify the information contained in this catalog 
without prior notice or obligation. The information in this 
catalog supersedes all previously published data. Products 
and systems may be improved and/or changed after this 
catalog is printed.
PRODUCT AVAILABILITY
Most products manufactured by ClarkDietrich are readily 
available in all markets, but there can be exceptions. Please 
contact your ClarkDietrich Sales Representative to make 
sure the product you need is available in your market area.
ClarkDietrich is a proud member of the Steel Framing 
Industry Association (SFIA).
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