A. There is no horizontal tie beam B. There is a horizontal tie at the feet of rafters only C. There is a horizontal tie at almost the middle of rafters only D. There are two horizontal ties, one at the feet and other at the middle of the rafters
A. The underside of a stair B. Outer projecting edge of a tread C. A sloping member which supports the steps in a stair D. A vertical member between two treads
A. To support the frame work of the roof B. To receive the ends of principal rafter C. To prevent the walls from spreading outward D. To prevent the tie beam from sagging at its centre
