Identify all zero force members Identify all unknown forces

Identify all zero force members. Identify all unknown forces and moments, if any. Identify which section is in compression or tension, if any.

ANANANANAN BCO, DEF, FGH, HII. UMN, Nap, POR, RST. Tuv All other sections d by Pinos) weight of Trus Through werten Truss

Solution

joints at A and K have AB AL =zero force since no ext force at A

Similarly JK and KV

Now also the vertical BM,Cn, etc are andidates. if the spans are weightless.

Neglect the verticals through the midpts of the solid spans. But the verticals thru the joints are candidates ( ie CN, PE,GR, IT.

Check thru reslved forces

top horizontals are in compression, botom horizontals in tension