Portals or Large Span Conservatories
Conservatories that are extremely large and require extra support to take the weight of the roof and provide additional stability are known as large span or portal framed conservatories.
The uses for portal roofs are endless - from magnificent swimming pool enclosures to large commercial extensions; anything is possible due to the flexibility and advanced engineering of the large span system.
What is a portal?
A portal frame is an aluminium box section 'skeleton' used to support a roof. It sits on the inside of the cill line and the windows and doors form a cladding to the external of the portal. The aluminium is usually powder coated to a RAL finish to complement the windows, doors, other materials and even surrounding buildings.
Click here to see technical drawings defined by Ultraframe
When is a portal needed?
A portal frame is required when the roof may exceed standard sizes defined by Ultraframe or when the design of the roof cannot be supported by the window frames, frame stiffeners or tie bars.
Even though the roof can be manufactured it does not mean we can always 'prove' the roof. Remember, all the roof loadings are passed onto the window frames and existing buildings. If these cannot provide the necessary and lateral support, then additional support may be required.
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