Question

the drawing below shows the bean (b) and girder (g) layout for a small one - story office building. if d = 8 ft and l = 30 ft, what is the total area?
options:
240 ft^2
360 ft^2
720 ft^2
can not be determined with knowing the loads (ll, dl)
480 ft^2

Explanation:

Step1: Calculate total width

The total width of the building is composed of 3 equal - length segments of length $D$. So the total width $W = 3D$.
Given $D = 8$ ft, then $W=3\times8 = 24$ ft.

Step2: Calculate area

The length of the building is $L = 30$ ft. The area of a rectangle is $A = L\times W$.
Substitute $L = 30$ ft and $W = 24$ ft into the formula, we get $A=30\times24=720$ ft².

Answer:

720 ft²