Solve for the angle bars only. Assume $15$ sets of full truss. Table form.

HOW TO COMPUTE?

For angle bars:

Get the total length of top chord $/$ bottom chord and web members

No$.$of pieces $=\frac{\text{T}\text{o}\text{t}\text{a}\text{l}\text{L}\text{e}\text{n}\text{g}\text{t}\text{h}}{\text{C}\text{o}\text{m}\text{m}\text{e}\text{r}\text{c}\text{i}\text{a}\text{l}\text{l}\text{y}\text{A}\text{v}\text{a}\text{i}\text{l}\text{a}\text{b}\text{l}\text{e}\text{L}\text{e}\text{n}\text{g}\text{t}\text{h}\text{,}6(m)}$