Knee walls are short usually wooden walls installed around the sides of an attic where the rafters meet the floor.
Supporting roof rafters without kneewall.
A standard triangular roof known as a gable roof is framed using rafters which are diagonal members that support the roofing materials.
In most instances they are no taller than 3 feet but some builders may custom fit them according to the roof s shape and size.
A knee wall is a short wall typically under three feet one metre in height used to support the rafters in timber roof construction.
How to frame a gable roof without ceiling joists.
Check that the 2 by 4 is plumb with a spirit level.
In his book a visual dictionary of architecture francis d.
You can see the image below for an example of a knee wall.
Use a hammer and nails to fasten the new rafter to the old and drive nails through the rafter and into the ridge beam at its top end.
Install the second rafter leg in the same manner.
Ching defines a knee wall as a short wall supporting rafters at some intermediate position along their length the knee wall provides support to rafters which therefore need not be large enough.
Repeat the process on the other side of the old rafter so that the old is sandwiched between two new pieces.
Some of these can support the roof and prevent ridge sagging and wall spreading.