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// CODE SNIPPET

R603.2.3 Dimension, Thickness and Material Grade

2015 Washington State Residential Code > 6 Wall Construction > R603 Cold-Formed Steel Wall Framing > R603.2 Structural Framing > R603.2.3 Dimension, Thickness and Material Grade
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Load-bearing cold-formed steel wall framing members shall comply with Figure R603.2.3(1) and with the dimensional and thickness requirements specified in Table R603.2.3. Additionally, C-shaped sections shall have a minimum flange width of 15/8 inches (41 mm) and a maximum flange width of 2 inches (51 mm). The minimum lip size for C-shaped sections shall be 1/2 inch (12.7 mm). Track sections shall comply with Figure R603.2.3(2) and shall have a minimum flange width of 11/4 inches (32 mm). Minimum Grade 33 ksi steel shall be used wherever 33 mil and 43 mil thicknesses are specified. Minimum Grade 50 ksi steel shall be used wherever 54 and 68 mil thicknesses are specified.


FIGURE R603.2.3(1) C-SHAPED SECTION



FIGURE R603.2.3(2) TRACK SECTION


TABLE R603.2.3 LOAD-BEARING COLD-FORMED STEEL STUD SIZES AND THICKNESSES
MEMBER
DESIGNATIONa
WEB DEPTH
(inches)
MINIMUM BASE STEEL THICKNESS
mil (inches)
350S162-t 3.5 33 (0.0329), 43 (0.0428), 54 (0.0538)
550S162-t 5.5 33 (0.0329), 43 (0.0428), 54 (0.0538), 68 (0.0677)

For SI: 1 inch = 25.4 mm; 1 mil = 0.0254 mm.
  1. The member designation is defined by the first number representing the member depth in hundredths of an inch, "S" representing a stud or joist member, the second number representing the flange width in hundredths of an inch, and the letter "t" shall be a number representing the minimum base metal thickness in mils.

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