ANS:E - the upper and lower ends of the web.

The plate girder of span 24 m carries the service load as follows:

Dead load:
a) uniformly distributed load= 15 kN/m.
b) concentrated load Wd1= 150 kN at 8 m from the right end.
c) concentrated load Wd2= 150 kN at 8 m from the left end.

Live load:
a) uniformly distributed load= 30 kN/m.
b) concentrated load Wl1= 300 kN at 8 m from the right end.
c) concentrated load Wl2= 300 kN at 8 m from the left end.