Design Of Compression Members
Choice of Section
If the compression members free to buckle in any direction , the a pipe section would be the most economical since it has the same value of i in all direction .
In order to obtain large values of i , it is desirable to distribute the material in a section as far away from the centroidal axes as possible , in doing so however the thickness of the material should not be reduced below a certain minimum .
By furnishing intermediate supports in a compression member in one direction , the value of the buckling length will differ in two direction , the value of the buckling length will differ in two directions and it might be economical to use sections with different i-values
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