Roof trusses: Trusses as shown in Figure 3.34 are to be constructed to support the roof of a building. The truss is to have a 16-foot horizontal base (joist) that spans from one wall to the opposite...

Roof trusses: Trusses as shown in Figure 3.34 are to be constructed to support the roof of a building. The truss is to have a 16-foot horizontal base (joist) that spans from one wall to the opposite wall. The vertical center strut is 4 feet long.

a. Vertical struts are located 3 horizontal feet inside each wall. How long are these vertical struts?

b. The rafter extends 1.5 horizontal feet outside the wall. If the top of the wall is 8 feet above the floor, how high above the floor is the outside tip of the rafter?