For an I-beam a simpler expression is obtained. Since b = c and u = t Equation [3] 

 becomes 



d + h 

 e = —^ [14] 



while the Equation [12] for /, reduces to 



h = 



{d - t)'' 

 12 



/ 4** \ 



[15] 



The expression for /^ is 



4-^ 



4 



{d+ A)2 {d-t)^ I ^ 46i! 



'. IT T 



(-f) 



[16] 



For a T- section, the quantities c and u are zero and Equation [5] can be written 



V L 



{d 



, (6< + /I,) bt'^ 



- t) i + — 



2 2 



[17] 



which reduces to 



2 \ Af d I 



^ 



[18] 



Substituting this expression in Equation [8j 



/ 12 ^ '4 \ Af 



[19] 



d^ 



± 



12 



(-t) (-^) 4] 



[20] 



d^ 



+ — 6« 

 4 



(-?) 



12 



