Archive for March 2010

dear sir/madam

I want to know if the "R" is different in ASD or LRFD method, is it depend on load combinations also?

thanks before

For portal frame rafters, what is magnitude of the force subjected to the knee brace resulting from preventing the rafter compression flange to deform?

a friend of mine told me that it’s about 5% of the compression force in the rafter

if it’s x%…then x is the force resulted from the laterlal torsional buckling at the particular point…?

I have a tapered Column and a Haunched rafter, how can I get "K" from the Chart while the Column’s moment of Ineria is not uniform along the column and rafter’s length…?