Timber Frame Roof Construction Details

Shipwrights were the original american timber framers.

Timber frame roof construction details.

Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. 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. 2 heavy timber construction details.

The original roof was built using purlins beams extending between gable ends. The construction of the flat roof is similar to that of the timber upper floor. Many people still think that the roof structures of timber framed buildings look like the upside down hulls of boats. Timber framing in america is an art of craftsmanship brought by the settlers in the 1500 s.

Below is a sketch of the original roof wall structural details for this building. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates.