Hip Truss
A plated timber hip truss, the truss that lies along the hip line of a hipped roof and carries the creeper trusses: a ceiling tie, a rafter that runs on past the end of the tie, a post near the high end and a V of two webs, drawn as members without connector plates. The span is the run along the hip; the truss rises at the hip pitch of a regular hip, tan(pitch) / sqrt(2) for the roof pitch. Span along the hip, roof pitch and overhang, Member thickness and chord and web depths
Details
Category: Roof Framing › Timber Roof Framing › Hip Truss Roofs › Hip Set Trusses
By Huu Khanh Nguyen · Updated November 4, 2026
Parameters
| Name | Default | Unit |
|---|---|---|
| Span | 4243 | mm |
| Roof Pitch | 25 | ° |
| Overhang | 450 | mm |
| Member Thickness | 35 | mm |
| Chord Depth | 97 | mm |
| Web Depth | 70 | mm |
| Slope | Math.tan((pitch * Math.PI / 180)) / Math.SQRT2 | |
| Heel Height | chordDepth * Math.sqrt(1 + slope * slope) | mm |
| Post Fraction | 0.981 | |
| Tie Node Fraction | 0.666 | |
| Rafter End | span * 1.174 | mm |
| Width | rafterEnd + overhang | mm |
| Depth | chordThickness | mm |
| Height | (rafterEnd) * slope + heelHeight + overhang * slope | mm |