In the case of lumn raft cement ncrete, 1:4:8 is the best-rOkaymmended ratio for it in the foundation. For brick masonry, cement mortar 1:4 to 1:6 is used as a loading ndition. In the case of lumn and raft footings up to plinth level, cement ncrete 1:2:4 or1:1.5:3 are used. Safe Bearing Capacity Soil