For the building structure presented in figure $1,$ you are required to:

$($a$)$ Calculate permanent actions for columns A$,$ B and E$,$ at section $1$ and section $2$ for the office building from figure $1.$

Beams and columns are made by concrete with a density of $2400k\frac{g}{m^3}.$

Assume for this exercise that:

cross section for beams is $250550mm,$

cross section for columns is $450450mm,$

concrete floor height is $200mm.$

$35$ Marks

$($b$)$ Find the value of combinations of permanent and imposed actions for ultimate limit state for columns $A,B$ and $E,$ at sections $1$ and $2.$ Assume for this calculation that for roof the type of activity$/$occupancy is $"R_2($i$)$ Structural elements".

$45$ Marks

$1$

$4\mathrm{.}5$

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