Timber Frame Roof Details

A timber frame truss roof with ridge beam purlins and common rafters is a stunning combination that creates visual interest and structural complexity.

Timber frame roof details.

If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12. Line length is the hyptenuse of the triangle whose. Timber framing in america is an art of craftsmanship brought by the settlers in the 1500 s. Above these components is a rack of common rafters.

There is a hierarchy of timber framing at work here with trusses supporting the ridge and purlin beams. Figure 2 2 roof framing terms. Shipwrights were the original american timber framers. The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging.

Timber frame standard details september 09 building 1 grosvenor court hipley street old woking surrey tel. Wood frame or glued laminated arches for roof con struction which spring from the floor line or grade and do not support floor loads shall have members not less than 6 inches nominal in width and 8 inches nominal in depth for the lower half of the height and not less than 6 inches nominal in any dimension for the upper half of the height. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. 2 heavy timber construction details.

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.