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Section $1$: Structural Design Action $(25$ marks$)$

A school building is located in the Wellington area at a site about $150m$ above sea level. The building design working life is $100$ years. Below are other design information:

$,$ Fundamental period is $)=(0\mathrm{.}075$

Site subsoil class is C$.$

All loading should be in accordance with NZS$1170.$

The building design wind pressure if the aerodynamic shape factor is $1\mathrm{.}3.$

The average roof height of souroundded building within a $45$ sector of radius $20h$ is $6\mathrm{.}30m.$

The average breadth of shielding buildings is $8m.$

Determine the Elastic site hazard spectrumutilizing the equivalent static method of NZS $1170\mathrm{.}5.(12\mathrm{.}5$ marks$)$

The design wind speed $(Vdes,)$ for $=0.(12\mathrm{.}5$ marks$)$