The structure shown is a workshop that will be built for a governmental regional office in Rundu in Namibia. For the layout calculate the structural loading based on the South African National Standards considering the following information in addition to the drawing details:

$1.$ The client has not estimated the weight of pipes, services and equipment hanging from the roof. The roof sheeting weight is unknown and there could be insulation on the roof and side walls.

$2.$ The structure altitude in Rundu, Namibia is unknown however the workshop could potentially be in an industrial area. The terrain characteristics and categories need to be determined using SANS $10160-3$

Answer the following:

$1.$Determine the peak wind pressure for the design of the building.

$2.$ Determine the external pressure coefficients for the roof and walls when the wind blows from $($a$)$ Grid Line A to C$,$ and $($b$)$ Grid Line $1$ to $10.$ Show these on a diagram.

$3.$ Determine the internal pressure coefficient when the wind blows from GL$.$ A to C when $($a$)$

both doors are open, and $($b$)$ when the doors are closed.

$4,$ Determine the line loads $($in kN$/$m$)$ to be applied to the worst case internal bay portal fram when the wind blows from GL$.$ A to C and the doors are closed. Only calculate the worst ca uplift forces.

$5.$Determine the imposed and permanent loads to be applied to the structure as point loads from the purlins. Rafter and column loads will be added by the software used.

$6.$ List the load combinations for the structure. Assume that there is only $2$ wind load cases, W$1$ and W$2($where in fact there could be $4$ wind directions x $2$ cpi factors x $4$ wind roof cpe

orientations $($up$-$up$,$ up$-$down, down$-$up$,$ down$-$down$)=32$ wind cases$).[$An experienced

engineer could reduce the total number of load combinations to about $3-10].$