Box truss roof system
600 × 525 roof beams on 400 × 400 pillars, raised on aluminium sleeve blocks with top plates and rollers.
- Beams: 600 × 525
- Pillars: 400 × 400
- Sleeve blocks: aluminium, 4 per roof
Recent systems: 60 × 40 ft and 60 × 60 ft roofs on 30 ft pillars.





