Heavy End Bay Sleeved Purlin Run
A run of steel zed purlins with heavier end bays and lighter inner bays, every joint joined by an inverted zed sleeve (longer and heavier at the second rafter from each end), cleats at every support and anti-sag rods between the lines. Bays along the run (five or more) and the bay span, Rafter length and the largest line spacing, Purlin depth, end bay and inner bay thickness, Cleat width and anti-sag rod rows
Details
Category: Roof Framing › Steel Purlins › Sleeved Purlin Runs
By Huu Khanh Nguyen · Updated November 4, 2026
Parameters
| Name | Default | Unit |
|---|---|---|
| Bays | 6 | |
| Bay Span | 6000 | mm |
| Rafter Length | 3600 | mm |
| Largest Line Spacing | 1200 | mm |
| Purlin Depth | 203 | mm |
| End Bay Thickness | depth == 203 ? 1.9 : 3.0 | mm |
| Inner Bay Thickness | depth == 203 ? 1.5 : 2.4 | mm |
| Cleat Width | 75 | mm |
| Bridging Rows | 2 | |
| Finish | white | |
| Run Length | bayCount * span + cleatWidth | mm |
| Height | cleatGap + depth | mm |
| Line Intervals | Math.ceil(rafterLength / maximumSpacing) | |
| Line Spacing | rafterLength / lineIntervals | mm |
| Cleat Gap | depth <= 250 ? 10 : 20 | mm |