Af=350;//cross sectional area of flanges,given in mm^2
As=300;//Cross sectional area of stiffners,given in mm^2
ESM=750;//elastic section modulus,given in mm^3
t=2;//thickness of web,given in mm
MA=2000;//2nd moment of area of a stiffner,given in mm^4
E=70000;//given in N/mm^2
I=2000;//moment of inertia
d=400;//given in mm
b=300;//given in mm
W=5000;//given (5 KN in N)
z=1200;//given in mm