Problem: A punch press, used for stamping sheet metal, has a punching capacity of 50 kN. The section of the frame is as shown in Fig. below. Find the resultant stress at the inner and outer surface of the section. 100 200 48 300 100 Section at X-X All dimensions in mm. 800 W CN HI R 4(-1)+th R+ (by-1) log. +.log R +4-0 R R=R₁₂+ ht+1 (-1)