148) Generally the purlins are placed at the panel points so as to avoid

149) For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as[where p is basic wind pressure]

150) The relation between intensity of wind pressure p and velocity of wind V is taken as

151) The live load for a sloping roof with slope 15°, where access is not provided to roof, is taken as

152) The internal pressure coefficient on walls for buildings with large permeability is taken as