एक सीढ़ी (Staircase) के निर्माण में, किसी कदम की क्षैतिज ऊपरी सतह जिस पर पैर रखा जाता है, उसे क्या कहा जाता है?

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?