Figure U$2.$ Loaded timber truss.The loaded timber truss shown in Figure Q$2$ is supported on a pin at B and a roller at E and are

spaced at $1\mathrm{.}2$ m centres and support concentrated design loads at the node points as indicated. Verify

the suitability of the members GD and CD of the truss.

Data:

Timber: European whitewood Grade SS

Timber Service Class $2$

Strength Class C$30$

Gusset plates: Finnish, birch$-$faced plywood glued$/$nailed to each side of single members.

Bottom chord $=50$ mm x $100$ mm

Diagonal member $=50$ mm x $75$ mm

Assume that the variable load is medium$-$term.

Assume the roof construction is continuous over at least two spans.

Hint: Determine the member design compression$/$tension force using method of section.