Design of Compression Members | Design of Steel Structures we
DESIGN OFCOMPRESSION MEMBERS 1. Determine slenderness ratio of the member. If end conditions can be assessed, refer Table 11 in IS code to get effective length. In case of bolted, riveted or welded trusses effective length shall be taken as 0.7 L to 1.0 L where L is the actual length, depending upon the degree of end restraint provided. 2. Various shapes of cross section are divided into buckling classes a, b, c and d for which Table 10 in IS 800–2007 may be referred. 3. Find imperfection factor a which is 0.21, 0.34, 0.49 and 0.76 for buckling class a, b, c and d respectively. 4. Then, design compressive stress fcd of axial loaded column is given by fcd = where a = 0.5 [1 + a (l – 0.2) + l 2 ] and l = non-dimensional effective slanderners ratio = KL = Effective length 5. One can refer to Table No. 9 in IS 800–2007 also and use fcd straightaway. Design of Laced Columns 1. Lacing may be single or double. 2. Thickness of flats for lacing shall not be less than of its effectiv...