Timber Frame Roof Details

Below is a sketch of the original roof wall structural details for this building.

Timber frame roof details. There is a hierarchy of timber framing at work here with trusses supporting the ridge and purlin beams. Figure 2 2 roof framing terms. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. Timber frame standard details september 09 building 1 grosvenor court hipley street old woking surrey tel.

The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging. Many people still think that the roof structures of timber framed buildings look like the upside down hulls of boats. The original roof was built using purlins beams extending between gable ends. 2 heavy timber construction 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. 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. Above these components is a rack of common rafters. Shipwrights were the original american timber framers.

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