Steel design: Difference between revisions

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-{{review}}
 == Preliminary Sizing of Elements ==
-=== Portal frame ===
-Steel portal frames are capable of spanning large distances. They are
-used in the construction of factories and warehouses, and other low-rise
-buildings that require wide spans. Wall and roof bracing is normally
-provided in selected bays, often at the end of buildings. Additional
-vertical column or beam sections may be introduced at the gables
-(wind posts) to support cladding on end walls.
-Roof beams (rafters) and columns are usually fabricated from rolled
-steel sections, while purlins and cladding rails are usually in light
-steel sections. Liner trays may be used as an alternative to cladding
-rails.
-Cladding materials include built-up cladding systems (as shown),
-composite cladding panels, and masonry.
-Small single storey industrial buildings can also be constructed
-using light steel sections for the columns and rafters
-[[Approximate structural sizing]]
-ROOF BEAMS (RAFTERS)
-Typical span = 20-50 m
-Beam depth = Span/60
-Cold formed rafters span up to 18 m
-COLUMNS
-Column depth = 1.25 x roof beam
-Width = as UB sections

Revision as of 20:06, 28 June 2008