Timber Frame Roof Construction Details

Framing a roof is the last step in framing new construction.

Timber frame roof construction details.

Many people still think that the roof structures of timber framed buildings look like the upside down hulls of boats. 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. 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. Timber frame standard details september 09 building 1 grosvenor court hipley street old woking surrey tel.

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. 3 05 timber frame pitched roof. 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. 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. 44 0 1483 770863 e mail. 44 0 1483 769518 fax.

The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. The construction of the flat roof is similar to that of the timber upper floor. The original roof was built using purlins beams extending between gable ends.

Timber framed and historic buildings may be framed with principal rafters or timber roof trusses.