Week 4 Challenge

1. =>ISMB 500

B= 180mm

tf= 17.2mm

tw= 10.2mm

d= 500mm

b/tf = 180/2/17.2 = 5.2≤9.4ε

d/tw = h-2tf/tw = 500-2*17.2/10.2 = 45.64≤84ε

=>ISMC 200

B= 75mm

tf=11.4mm

tw= 6.1mm

d=200mm

b/tf = 75/2/11.4 = 3.2≤9.4ε

d/tw = h-2tf/tw = 200-2*11.4/6.1= 29.04≤84ε

so both sections ISMC200 and ISMB500 are plastic sections

=>PG 1300*450*20*12

B= 450mm

tf=20mm

d=1260mm

tw=12mm

b/tf = 450/2/20 = 11.25≤13.06ε

d/tw =1260/12 =105≤126ε

it is semi compact section

=>Double angle 2 ISA 75*75*6

d/t= 75-6/6

= 11.5≤13.06ε

semi compact section

=>RHS 150*100*10

b/tf= 100-10*2/10

=8≤9.4ε

d/tw= 150-10*2/10

13≤84ε

hence plastic section

=> Builtup box 1000*450*20*12

b/tf= 450/2/20 = 11.25≤13.06ε

d/tw = 960/1280= 80≤84ε

semi compact section