What changes are found in the safe bearing capacity (SBC) of the soil when you go deeper? The soil near the surface is usually loose and weak. The deeper you go, the more the soil becomes harder and compact, and its safe-bearing capacity (SBC) .

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.