The% pavilion% of% union% house%is%supported%by% columns%on%the%edges% learning loop;! a n d% c a b l e s% t h a t% Metals: Metals are malleable, ductile and non-brittle. There are two kinds of metals: ferrous (iron, common can cheap) and non-ferrous (all other the%! roof% in% metals, have different qualities). Because of the nature of metals, they can be shaped intostabilise% many shapes. Prevent metals from corrosion and oxidation: metals can be separated by insulator suchwindy% as rubber gasket or kept weather.% This%away from sitting in moisture. For oxidation, it is not always damages: Aluminium oxidate to form a layer protecting the metalopening% from corrosion. Rusty steel is an example of undesired is% the% lowest% oxidation that it saves water and moist air within the structure to form further corrosion. For avoiding corrosion, 1) avoid crevices and creating flat point% treatment—galvanised of% the% roof% horizontal surfaces; 2) enamel or paint metal surface—seal the surface from moisture. 3) chemical steel. ! which% enables% rain% Ferrous Metals: very reactive chemically, they are easily corrodes through rusting. Good compressive strength. Usually used 1) wrought iron— iron water%to%drainage%and% heated and hammered into desired shapes. Used in windows and door bars and decorations. 2) Cast iron— iron melted and pored into moulds. p r e v e n A n g % t h e% brittle, requires reinforcement. columns. 3) steel— alloy of iron and carbon. They are strong and resistant to fracture. Can be formed into many columns% from% over% different shapes. ! load.% Cable% around% Non-ferrous metals: 1) Aluminium—structural capabilities. 2) Copper—used as roofing materials or for hotis% and cold domestic water and heating this% opening% loose% pipework or electrical cabling. 3) Zinc—layer of zinc on iron can help to protect them from rusting. 4) Bronze: bearing, in% normal% days% and% in% clips, springs or electrical connectors. 5) Brass— screws, valves. ! tension%in%windy%days.% hot rolled ! structural steel: 1) hot rolled (parallel flange channel in OP): shaped when the metal is% still hot. usually used as tension
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primary structural elements of a building, and often protected by coating. Joints between hot rolled structural steel are bolted or welded. 2) cold formed: folded from sheers that have been previously produced and cooled down. Usually more expensive than hot rolled steel. Usually protected by galvanisation. Joints between are bolted or screwed. ! This% column% funcAons%
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Roof system: 1) flat roof: 1—3 degrees, there is no “flat” roof because then they won’t be able to drainage water. 2) bearing% the% load% of% pitched roofs—bigger than 3 degrees. Tile roof should be bigger than 15 degrees.
t h e% r o o f ,% i t% a l s o% supporAng%the%roof%to% k e e p% i t s% s h a p e .% FooAng% under% this% column%should%be%pad% fooAng.%%% %
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cold formed !
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