A beam is simply supported and carries the load shown in Figure P3–31. Specify suitable dimensions for the beam if it is steel and the stress is limited to 18 000 psi, for the following shapes: 

Data in Figure P3-31

(a) Square. 

(b) Rectangle with height three times the width. 

(c) Rectangle with height one-third the width.

(d) Solid circular section. 

(e) American Standard beam section. 

(f) American Standard channel with the legs down.

(g) Standard steel pipe.

Transcribed Image Text:

3 ft 1200 lb 4 ft 1200 lb 3 ft R₂