Trussed Gable Roof
A gable roof framed with plated timber trusses at a set spacing over a rectangular plan. Plan length and span over the wall plates Pitch, truss spacing and overhang Truss member thickness and depths
Details
Category: Roof Framing › Straight Truss Roofs
By Huu Khanh Nguyen · Updated November 4, 2026
Parameters
| Name | Default | Unit |
|---|---|---|
| Length | 6000 | mm |
| Span | 9000 | mm |
| Pitch | 31 | ° |
| Truss Spacing | 600 | mm |
| Overhang | 450 | mm |
| Member Thickness | 35 | mm |
| Chord Depth | 97 | mm |
| Web Depth | 70 | mm |
| Width | span + 2 * overhang | mm |
| Depth | Math.min(Math.floor(length / spacing) * spacing, length - chordThickness) + chordThickness | mm |
| Height | (span / 2 + overhang) * Math.tan(pitch * Math.PI / 180) + chordDepth / Math.cos(pitch * Math.PI / 180) | mm |