HI I am using the effective length method (AISC 360-10 /ASD) to design steel Hanger with tapered members in STAAD PRO .The TABLE C-A-7.1 in the appendix 7 suppose that the section is contsant .So the questions are : 1-How to define the effective length factor for the in plane buckling Kz for a tapered members ? Can we still use the The TABLE C-A-7.1 2-The out of plane factor is still can be taken as ky=1 .00 using the length between the girts ? 3-The value calculated by Staad pro for the factor Cb lateral-torsional buckling modification factor if we assign the Cb =0,give good results ? 4-For a steel hanger (single story ) ,what are the recommended values for KY ,KZ ,LY ,LZ for in plane and out of plane buckling of the columns ? thank you !
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