Posi-Joist Span Table
All spans shown are maximum clear spans in millimetres. Deflections limited to 14mm. Domestic floor loads only. Posi-rafter spans based on 30° pitch. This table is a guide and the actual spans may differ slightly once a full design & quote has been carried out.
Floor Joist Configurations
| Depth (mm) | Joist Width (mm) | Centres (mm) | Clearance Between Flanges (mm) | Max Span (mm) |
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Flat Roof Joist Configurations
| Depth (mm) | Joist Width (mm) | Centres (mm) | Clearance Between Flanges (mm) | Max Span (mm) |
|---|
Rafter Configurations (30° Pitch)
| Depth (mm) | Joist Width (mm) | Centres (mm) | Clearance Between Flanges (mm) | Max Span (mm) |
|---|
