Problem 1:
Determine:
1. The interior and end panel point loads and reactions on the truss (check that they
sum up to the given total load on the truss!).
2. The maximum tension force and maximum compression force in the diagonals, (and
identify which they are).
3. The maximum tension force and maximum compression force in the verticals, (and
identify which they are).
4. The maximum tension force and maximum compression force in the chords, (and
identify which they are).
yield
5. Using a square cross-section ($b = h$, $I = b^4/12$) of a material with an allowable stress
of 15 ksi, and a Young's modulus of $E = 2,000,000$ psi, size the \"worst-case\" top
chord, bottom chord, diagonal and vertical for crush and bending to the nearest
inch. Use a factor of safety for crush of 1.67, and for buckling of 1.9, i.e. find the
minimum size of the cross section which will work for crush and buckle, (to the
nearest inch). THIS MATERIAL IS NOT (QUITE) OUR 226 PROJECT MATERIAL, SO
YOU CAN'T USE THE TABLES FOR THIS ONE!
Total distributed load on the truss (from trib. strip) = 240 kips. Span = 96', depth = 12'.
Hybrid configuration of verticals and diagonals.
