Warehouses, factories, packing sheds, cool stores, sawmills, gymnasiums and halls have all been successfully designed using gusseted portals. Particularly suitable and economical for spans between 15m and 36m, these portals have also proved successful in smaller buildings.
Aesthetics – Glulam portals provide a structural system that would otherwise require camouflaging or disguising. Staining Glulam portals can bring added contrast to highlight the chosen ceiling form.
Pre-Fitting – Glulam portals can be pre-fitted in factory so that once onsite the members and their connecting brackets need only to be assembled. Pre assembling creates savings in valuable on-site labour and craneage costs.
Ease of Installation – Light, dry timber beams arrive on site ready for speedy installation. Glulam portals are confidently handled by carpenters and subcontractors. They require no specialist erection techniques.
Fire Resistance – For superior fire resistance ratings of Glulam beams, see the TimberLab Fire Performance Data Sheet.
Once on site, the assembly and erection is speedily achieved with standard carpentry labour.
1. While the rafter is lying on the ground, the two columns can be simply slid into position and the gusset is fixed to the rafter member. The assembled frame can then be stood up and fastened to anchor connections.
2. Alternatively, the columns can be stood in position with prefixed gussets ready to receive the rafter members. Rafters can be set out on the ground and purlins and bracing easily fixed before they are lifted. One complete beam pair may be raised conveniently into position on top of the columns and fixed with the gussets.
Indicative Span Tables
|Span (m)||Spacing (m)||Eave Height (m)||
Light Roof & Ceiling
Nothing contained in this material shall be construed as a warranty or otherwise as to the accuracy or safety of the information provided. Specific design work should be carried out by qualified engineers. Design information for structural laminated timber is fully contained in NZS 3603, Chapter 8.