الفهرس 
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Abstract
The effect of providing knee braces on the stability of
different types of frames is studied. The critical
buckling loads of rectangular multi-bay frames and
multi-storey frames provided with knee braces are
investigated. The study is extended to include
non-rectangular frames provided with knee braces, frames
with stepped column sections carrying crane loads and
multi-bay frames with different bay heights. Different
knee bralng distributions inside the frames are treated
in order to obtain the optimum distribution of knee
braces of each type of frames. The excluding of knee
braces from any storey of multi-storey frames has been
carried out to investigate the effect of such
elimination on the critical buckling load of the frame.
The study includes the mathematical procedure to deduce
”Theory of Multiples” for multi-bay frames provided with
knee braces. Computer programmes are prepared to
calculate the critical buckling loads using direct
method and stiffness method of analysis.