सामान्य भवन मानकों के अनुसार, एक सीढ़ी का झुकाव कोण (pitch) किससे अधिक नहीं होना चाहिए?

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?