Purlin Selection & Span Table
Cold-formed Z and C purlins are lightweight, cost-effective roof and wall members for industrial buildings. This reference covers quick span selection, full load tables, and section data for Z and C sections.
Quick Reference: Typical Z Purlin Spans
Maximum span for single-span purlins (butt-jointed and sleeved) at 1200mm centres, assuming 1.5 kN/m² imposed load.
| Section Depth (mm) | Gauge | Max Span Butt (m) | Max Span Sleeved (m) | Typical Weight (kg/m) |
|---|
Spans vary by load case and support conditions. Always check full load tables and verify with manufacturer data.
Full Butt Purlin Load Table
| Section | Gauge | Span (m) | UDL (kN/m) | Point Load (kN) | Moment Cap (kNm) |
|---|
Z Purlin Section Data
| Designation | Depth (mm) | Flange (mm) | Gauge (mm) | Weight (kg/m) | Moment Cap (kNm) |
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C Purlin Section Data
| Designation | Depth (mm) | Flange (mm) | Gauge (mm) | Weight (kg/m) | Moment Cap (kNm) |
|---|
Eaves Beam Section Data
Cold-formed eaves beams sit at the eaves of a portal frame, transferring cladding loads to the main frame. The data below is sourced from Albion Sections Technical Manual AS-2/2010 (S450 grade, Z275 galvanised coating).
| Designation | Depth (mm) | Flange Width (mm) | Thickness (mm) | Weight (kg/m) | Grade |
|---|
Section data is geometric and weight only. Load capacity must be verified from the manufacturer's load tables based on span, support conditions, and load case.
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