Determine the most economical and safe design

An axial load P is supported by a short W8 X 40 column of a cross-sectional area A = 11.7 in2 (inches squared) and is distributed to a concrete foundation by a square plate as shown (in the attachment) Knowing that the average normal stress in the column must not exceed 35 ksi and that the bearing stress on the concrete foundation must not exceed 3.5 ksi, determine the side a of the plate that will provide the most economical and safe design.

Determine the magnitude of tensile force and corresponding normal stress of a wire

A 28-ft length of 0.25-in.-diameter steel wire is to be used in a hanger. It is noted that the wire stretches 0.55 in. when a tensile force P is applied Knowing that E = 29 X 10 (to the 6th power) psi, determine (a) the magnitude of the force P, (b) the corresponding normal stress in the wire. a) 1.19 kips; 51.68 ksi b) 2.33 kips; 47.42 ksi c) 7.25 kips; 23.61 ksi d) 4.23 kips; 37.83 ksi

Determine the maximum allowable stress

Knowing that, for the plate shown (see attachment), the allowable stress is 24 ksi, determine the maximum allowable value of P when r = 3/4 in. a) 35.42 kips b) 12.89 kips c) 43.27 kips d) 25.71 kips

Determine the largest bending moment

For the beam shown (see attachment), determine the largest bending moment that can be applied without exceeding either of the following allowable normal stresses: +7 ksi and -12 ksi.

Determine the largest allowable square cross section of a steel shaft

Determine the largest allowable square cross section of a steel shaft of length 6 m if the maximum shearing stress is not to exceed 135 MPa when the shaft is twisted through one complete revolution. Use G = 77.2 GPa.