CONSTRUCTING ENVIRONMENTS LOG BOOK- WEEK 4- LEARNING LOOP SPAN • Distance between vertical supports (for a horizontal Member) / between horizontal supports (for a vertical member) (Ching, 2014). • SPAN is not necessarily the same as the length of a member. SPACING • Repeating distance between a series of similar elements. Generally measured center-line to center-line. SPAN and SPACING • SPACING of the supporting elements depends on the SPANNING capabilities of the supported elements (Ching, 2014).
BEAM • Carry loads along length of the beam, transfers these loads to vertical supports. CANTILEVER • Created when overhanging portions of a member are significant • Function: Carry loads along length of member, transfer loads to the support. CONCRETE COMPONENTS
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Cement Fine aggregates (sand) Coarse aggregates (crushed rock) Water
FINISHES
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Sand blasted Exposed aggregate Raked finish (whist wet) Bush hammered Board marked Board and batten
PROPERTIES
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Hardness: High (Metal will scratch however) Fragility: Low (Hammer will chip) Ductility: Very low Flexibility/ Plasticity: Low Porosity/ Permeability: medium –low (Depends on proportions and components) Density: Medium- high Conductivity: Poor (Both heat and electricity)
INSITU DISADVANTAG ES • • • •
Less quality More labor Exposed to weather Cures slower
GLOSSARY Joist Bearer Girder Spacing