Civil Engineering - Steel Structure Design

A long plate girder is subjected to a maximum bending moment M in which permitted allowable bending stress is f_b. The economical depth d_e and the thickness of the web t_w, is given by

The beams supporting the steps of a stair are generally known as

In a grillage column footing maximum bending moment M occurs at the centre of grillage beams. Its value is (where P, L and a are axial load, length of the beam and length of the column base respectively).

For a steel grillage footing to support two unequal column loads

In case of cantilever fillers, the ratio of the span L to depth d, should not exceed