According to Rankine's formula and general Indian standard practices, the minimum depth of foundation below ground level for a load-bearing wall in sandy or clayey soil is restricted to:

Which of the following statements conform(s) to panel walls in building construction? 1. Panel walls are external load bearing walls. 2. They are self supporting walls subjected to lateral loads. 3. They are primarily used in framed structures.

Which of the following statements conforms to 'corbels' in masonry?