You are selecting a $2\mathrm{.}5m$ long tension member that will support an internal timber mezzanine

floor by hanging it from a portal frame. M$16$ bolts along the centre$-$line of the member will be

used to connect to steel brackets at both top and bottom. The mezzanine will support office

accommodation in a commercial warehouse in Ballarat $($Vic$).$ Six such tension members

support the entire floor of $80m^2.$ The loadings in the tension member are as follows:

$28kN$ permanent load per tension member

$53kN$ nominal imposed load per tension member $($from