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Trussed Rafters are now specified for the majority of domestic roofs constructed in most countries that use timber frame. The trussed rafter is an individually designed component, engineered to provide a structural frame for the support of a roof or similar structures.

Pre-fabricated from high quality, stress graded timbers and joined with steel nail-plate fasteners, the trussed rafter offers a "flexible, practical, and fully engineered solution to your roofing requirements".

Economy of materials, as trussed rafters can use up to 40% less timber than a traditionally formed roof. Reduced labour costs on site, due to the amount of prefabrication, releasing site joiners for more complex areas. Quick erecting of the roof structure, enabling other trades to commence quickly. Reduction in site waste, loss and pilferage of valuable materials. Space saving on site, with no need for timber storage or carpentry work areas.

Why choose trussed rafters?

Trussed rafters are individually designed components made from kiln-dried, strength-graded timber joined together with steel nailplates. They provide a structural framework to support the roof fabric, ceilings and /or floors.

Trussed rafters can be used on a wide range of building types including timber frame, masonry and steel frame. Although most commonly used for domestic housing they are increasingly chosen for commercial and industrial buildings such as offices, shops, hotels and leisure centres.

Trussed rafters stand out as a sophisticated and highly-engineered product, with superior fabrication underpinned by high production standards. They are more flexible and more cost effective than many other methods of roof construction.

Roof Trussed Rafters Technical Details

Trussed Rafters or Roof Trusses are without doubt the most popular way to form roof scapes. Not only do they arrive on site as a fully engineered and certified product, they are considerably cheaper and much more versatile than a traditional "cut roof" and typically consume 40% less wood.

Trusses supplied by ATF are made in our factory from drawings prepared by our engineer specifiers. We take your house drawings and special truss design software is used to determine exactly what is required in each individual case. Once our design engineer is satisfied that the chosen calculations meet all the necessary regulations he will issue the approvals.

There are many different types of roof trusses known as Duopitch type or Monopitch type. This simply means Duopitch has two slopes and a central ridge, whereas Monopitch has only one slope and sometimes called "lean-to". The most common Duopitch are shown below with the average span, although greater spans can be achieved.




Hybrid windows
Hybrid windows