Some close-up technical details of the latest frame
This frame is within a stones throw of the office, so I took the liberty of taking my daily allowed ‘exercise’ walk to take a couple of close-up pictures before it is completely closed in. The softwood studs are going in, as is an external skin of plywood, so all soon to be covered from the elements.
This is the first floor; queen posts either side, though technically I would call this a ‘jamb-de-force’ arrangement; the tie beam is cut through and outward thrust taken by vertical posts via stub ties. In sweet chestnut we have the cranked tie beam, spine beam, collars and far purlins. Virtually indistinguishable from oak.
The truss style is a favorite – clasp purlin. Note how the purlin is ‘clasped’ between collar and rafter, with a diminshed rafter above the collar height. The elegance of this ancient configuration is that the common rafters (softwood) have the same outer alignment as the primary (oak) rafters. A very neat and compact design. Just a sod to cut!
Heading downstairs now, here we have the junction of an elm floor joist into the sweet chestnut spine beam. The joist has a bare-faced soffit tenon, which provides full support. Traditionally these would be pegged from the top. I like the waney edge of the spine beam, still a bit of bark on there!
Further down, this image illustrates the jointing of the cross-rail to main post. The diminshed shoulder and thick long tenon provides full bearing for the belly of the cross-rail. Of course the brace also provides additional support. The horizontal elm beam to the left is known as a ‘girder’ and the smaller tenon provides location rather than primary support.
Thoughout the frame chamfers have been added to the primary horizontal timbers, with larger chamfers for the heavy cross-rails and spine beams. These latter chamfers have a ‘lambs tounge’ style chamfer stop just for an extra little bit of bling!