Fig. P$2$

density $=7850$kg$/$m$^3$

A parallel chord Pratt truss made of steel as shown in

Fig. P$2$ is to be hoisted into place by a crane. The

hoisting cables are placed at joints $6$ and $14.$ Assume

that each member is a circular hollow section with an

inner radius of $0\mathrm{.}1m$ and a wall thickness of $0\mathrm{.}025m.$

$($a$)$ Compute the total weight of the truss.

$($b$)$ Using the FBD of the system, compute the tensile

forces in the cables.

$($c$)$ Compute the member forces in members $1-2,1-3,$

$2-3,$ and $2-4$ using Method of Joints.

$($d$)$ Compute the member force in members $8-10,8-$

$9,$ and $7-9$ using Method of Sections.