Week 4 Learning summary
Span and Spacing
Spanning: - Distance that is measured between two structural
Floor Systems
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supports -Not necessarily the same length - can be measured between vertical supports (for horizontal member) or horizontal supports (for vertical member).
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Spacing -repeating distance between a series of like elements -often associated with beams Generally measured centre-line to centre-line
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Beam span (Ching, 2008) Column spacing Beams and Cantilevers
In Situ Concrete:
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used to span across structural supports Can run in one or two directions Slab thickness roughly worked out by the span of the slab divided by 30
Steel: -
Timber: -
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takes various forms and can use heavy, light or a combination of gauges steel beams support precast concrete slabs these beams then will possibly be supported by columns, girders or load bearing walls
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Precast Concrete: -
Concrete:
depending on structural function and loads floor openings may require additional framing beams support planking or decking beams supported by girders, post or load bearing walls (Ching, 2008)
cured on building site used for areas that require a large coverage of concrete (slabs), retaining walls, footings Joints used for in situ concrete are control joints and construction joints Doesn’t have a smooth finish like factory made concrete has Typically two main joints used, construction joints(breaks up sections)and controlled joints (allows for expansion and contractionprevents cracking)
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Manufactured in a factory- transported to site for installations Time efficient- not effected by climate, less labour on site Smooth finishes- flexibility to be able to polish, cut to shape- good for abstract structures Rarely used in footings but seen in retaining walls, columns and walls Limited in size due to transportation