Timber Frame Roof Construction Details

3 05 timber frame pitched roof.

Timber frame roof construction details.

44 0 1483 770863 e mail. The construction of the flat roof is similar to that of the timber upper floor. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below.

Wood frame or glued laminated arches for roof con struction which spring from the top of walls or wall abutments sawn timber trusses and other roof framing which do not support floor loads shall have members not less than 4 inches nominal in width and not less than 6 inches nominal in depth. Shipwrights were the original american timber framers. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. Ventilated batten void warm roof gable 3 06 timber frame timber flat roof 3 07 timber frame timber flat roof with parapet 3 08 timber frame lintel at window head 3 09 timber frame windows and doors jambs and cills specification within an example should 3 10 timber frame ground bearing floor insulation above slab 3 11 timber frame ground bearing floor insulation below slab.

It s considered heavy timber when. Below is a sketch of the original roof wall structural details for this building. The original roof was built using purlins beams extending between gable ends. The minimum sizes are 6 x 8 for a column supporting a roof 8 x 8 for a column supporting a floor 6 x 10 for a floor beam 8 x 8 for a roof truss member 4 x 6 for a roof beam 3 1 finish floor decking 2 roof decking according to the building code.

Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. Timber framing in america is an art of craftsmanship brought by the settlers in the 1500 s. Timber frame standard details september 09 building 1 grosvenor court hipley street old woking surrey tel. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls.

The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging.