A vertical load of 20000 lb is applied to a 6.0 ft × 4.0 ft area at the ground surface that is level. Use chart solution to compute the induced vertical stress, at a point 6.0 ft below the corner z of this rectangular loaded area.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.