All columns are $500$x$500$ mm$.$ The corbels have a constant thickness of $500$ mm but a variable

depth $[$Fig$.3($b$)].$ All columns $($including their corbels$)$ are made of concrete with a density of $\backslash$gamma

kg$/$m$3.$ The value of $\backslash$gamma differs across the different teams.

$$ The roof is made of a metal roofing, whose weight per unit area $($surface density$)$ is $8\mathrm{.}5$ kg$/$ m$2.$

$$ All truss elements are made from steel with a density of $7850$ kg$/$m$3.$ The cross$-$sectional area A

is different for each team. The roof is subjected to a snow load intensity of w kN$/$m$2,$ where the

value differs between the teams.