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But this rather crude structure puts more strain on the rafters and requires considerable strengthening of the walls to cope with the lateral thrusts.
This component of force along the rafter must be carried by a tenon with a comparatively small bearing area.
The top of the king post is splayed to receive the principal rafters.
It is not clear which direction the common rafters spanned between them.
The collar-beam supports a king-post reaching the top of the rafters, forming the ridge.
In that position the ends of the principal rafters are firmly restrained and their tendency to push the walls apart is most efficiently counteracted.
In engineering terms, there is a component of the strut forces parallel to the rafter.
These flowers are usually hung from the rafters to keep them free from contact with anything profane, thereby avoiding ritual pollution.
In some properties rafters and beams had to be replaced including, in one instance, a hammer beam.
The small rafters to be 5 8 to stand 10 in asunder.
This is then affixed to the end of the rafter in the middle of the front of the stage.
It consisted of an additional tie-beam with posts to support the diagonal rafters and a central principal, tied together with a collar: in other words, a small queenpost truss.
The larger volume became the house proper, its ceilings following the rafters to create a high space, exposing the old timber trusses and admitting daylight from the glazed apex.
I have bitterly lamented some decisions that we have taken and cheered others to the rafters.
A report on the investigation of trussed rafter roofs is due to be published in early 1979.
