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 5.3 Example 3 - A steel-framed warehouse on the edge of an urban area Design wind loads are required for a steel portal-framed warehouse in Manukau at the southern edge of the Auckland metropolitan area. The relevant information is as follows:  Location : southern edge of Auckland (Region A6)  Terrain : Suburban terrain for westerly through northerly to south-easterly directions. Open water to south and south-west.  Topography : ground slope less than 1 in 20 for greater than 5 kilometres in all directions.  Dimensions : eaves height : 5.85 m Horizontal dimensions, (Figure 5.3) : 25 metres  15 metres. Gable roof with 5 degrees pitch. average roof height = 5.85 + 0.5(7.5 tan 5 o )  = 6.2 metres  Building orientation : major axis is North-west   South-east  Steel portal f rame construction. Frames are spaced at 5 m.  The building has a large (4m wide by 3 m high) roller door on the south-west wall.  There are windows (1 m 2 ) near the south-east end, and a small (2.5 m 2 ) door near the north-west end, of the north-east wall. 5  b a  y s  @  5  m  = 2 5  m  S  p  a  n  =   1  5  m 5.85 m N  W SE  Figure 5.3 Framing of industrial warehouse

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