Precast concrete wall panels may serve as [answer1] capable of supporting [answer2] concrete or [answer3] floor and roof systems.

[answer1] and [answer2] are the two types of roofs..

Match column A (illustrations) and column B (foundation systems or structural systems):

Platform framing or ___________________

Which of the followings are about wood trusses?

[answer1] are the horizontal planes that must support both [answer2]—people, furnishings, and movable equipment—and [answer3]—the weight of the floor construction itself.

Joists are spaced 12″, 16″, or 24″ (305, 405, or 610) o.c., depending on the magnitude of applied loads and spanning capability of the subflooring. 

A concrete stair is designed as an inclined, one-way reinforced slab with steps formed on its upper surface.

Irregular structures are characterized by any of various plan or vertical irregularities, such as the symmetrical layout of mass or lateral force–resisting elements, a soft or weak story, or a discontinuous shear wall or diaphragm.

As a plate becomes more rectangular than square, the two-way action increases and a one-way system spanning the shorter direction develops because the shorter plate strips are stiffer and carry a lesser portion of the load.