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Cold-formed purlin tables

Steel Purlin Sizes

Use this page for purlin searches where cold-formed C, Z, plain channel, or lipped channel members are used for roof, wall, and secondary framing systems.

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Section data tables

Structural steel section selector

Select a section category, choose the section type, then filter dimensions, section properties, and material strength data in one place.

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C-Purlins

Cold-formed C purlins for roofing, cladding rails, and light steel framing.

Size range
C10010 to C35030
Standard
JIS G 3350 / EN 10162
C-purlin dimension callout
C-Purlin section diagram

C-Purlins size table

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JIS 3350

SSC400 strength bands and tolerances for purlins.

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yield bands

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Material specification table

1 of 1 thickness bands shown

MaterialStrengthDuctility and toughnessTolerances
MaterialStandardGradeThickness rangeYield strengthTensile strengthMin. elongationMin. Charpy V-notchDimensions and tolerances
JIS 3350JIS 3350SSC400base steel245 N/mm2400-540 N/mm217-21%-JIS 3350

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Tables covered

C purlins for simple roof and wall framing members.
Z purlins for lapped roof systems and continuous spans.
Plain and lipped channels for light framing and secondary members.
C purlin sizesZ purlin sizessteel purlin sizeslipped channel sizescold formed channel sizes

Selection checks

Cold-formed purlins require code checks for local buckling, distortional buckling, restraint, lap length, and screw patterns.
Supplier systems may use proprietary hole patterns and section names even when the nominal size appears similar.
Confirm coating, base metal thickness, design thickness, and load span tables before final selection.

Section families

Plain Channels

60 x 30 to 250 x 75. JIS G 3350 / EN 10162.

Lipped Channels

60 x 30 x 10 to 250 x 75 x 25. JIS G 3350 / EN 10162.

C-Purlins

C10010 to C35030. JIS G 3350 / EN 10162.

Z-Purlins

Z10010 to Z35030. JIS G 3350 / EN 10162.