Cruck Truss Raised by Westwind Team

29th February


The Westwind team have just finished raising this frame for our current oak frame and SIP project. It combines a variety of truss types, which will enhance the varying spaces in the house. The frame includes two jointed upper cruck trusses that sit either side of the main entrance hall, with a bridge spanning between them.

This type of cruck is a combination of the upper cruck and the Somerset/jointed cruck. It employs two pieces of oak to make up the blade, the lower section rises from the floor beam and curves to form the roof angle. They are then jointed into the collar, in which the straight principle rafters are also jointed into to form the apex of the roof.

This form of truss was chosen to incorporate the grand and historic form of the cruck, into the entrance hall of this building. The design of the cruck developed as we found that sourcing a 6m timber, with a 600mm deflection and at the required grade, proved very difficult in the timescale we had. The use of the jointed cruck reduced the length of the required curve whilst giving the same structural and aesthetical qualities.

The Kingspan TEK envelope (also supplied and fitted by us) is currently being fixed to the frame so we can leave the client with a watertight structure after only four weeks on-site.

Upper Cruck

Upper Cruck



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