156) Area of openings for buildings of large permeability is more than

157) As per IS : 875, for the purposes of specifying basic wind velocity, the country has been divided into

158) The number of seismic zones in which the country has been divided are

159) Minimum pitch provided in riveted steel tanks is[where d is diameter of rivets]

160) The allowable tensile stress in structural mild steel plates for steel tank is assumed as