Glossary Rafter: Installed on the roof to support the roofing. Eave: Is part of the roof, protrudes beyond the outer wall. Purlin: A longitudinal member in a roof frame, usually for supporting common rafters. Alloy: Combination of different metals. Canriliever: A element is supported by only one end. Soffit: The underside of an architectural feature. Portal frame: Consist if a kinds of braced rigid frames. Top chord: Top beams in a truss
RAFTER
soffit
Learning Loop: Trusses ·A structure formed by connecting both ends to each other by a hinge rod. Plane or spatial structure, truss rods generally have a triangular truss unit composed mainly by the straight bar subjected to axial tension or pressure, which can take full advantage of the strength of the material, in the span larger than the solid web girder save material, reduce weight and increased stiffness. Roof system: ·Flat roof: pitch 1-3 Pitched＆sloping roof: pitch ＞3 ·Concrete roofs: Are generally flat plates of reinforced concrete (orprecast slabs with a topping of concrete.) ·Structural steel framed roofs: primary and secondary roof Beams for heavier roof finisheds, or purlings and beams for lighter sheet metal roofing ·Sloping structural steel roofs:purlings, beams and lighter Mental roofing ·Portal frames: include braced rigid frameswith purling for The roof and list fot the walls Ferrous metals and alloys ·Iron: siginificant and important magnetic properties and very reactive chemically with good compressive strength. ·Wrought iron: It was used in bars for windows and doors for decorative elements. ·Cast iron: It is formed when iron is melted and the molten metal is poured into moulds to cool. It is rarely used in contemporary construction because of weight and britteness. Only compression elements may use it. Iron alloys- steel Structural steel ·With CARBON being the primary extra alloy element, steel is an alloy of iron . ·Steel is pretty sirong and resistant to fracture and is good at transfering heat and electricity. It Could be reshaped to many different shapes and long lasting and resistant to wear. Stee types and uses ·Framing- As columns, beams, purlins and stud frames. ·Hot rolled steel-Elements are shaped while metal is hot. More material is required. ·Cold formed steel-Elements are folded from sheets that have been previously produced. ·Reinforcing bars- It is used in conjunction with concrete to produce reinforced concrete. Steel sheeting ·Cladding and roofing Stainless steel alloys ·chromium is the main alloying element. Non-ferrous metals and alloys ·Compared different properties and types showing below. IRON, STEEL, TIN, BRONZE, TITANLUM, BRASS, COPPER, ZINC, ALUMINLUM, LEAD
Studio activities: Knowledge map for sites:
Reference: Newton, C. (2014). Roof systems. Retrieved from http://www.youtube.com/watch?v=q5ms8vmhs50&feature=youtu.be Newton, C. (2014). Introduction to materials.Retrieved from http://www.youtube.com/watch?v=RttS_wgXGbI&feature=youtu.be Newton, C. (2014). Ferrous Metals. Retrieved from http://www.youtube.com/watch?v=SQy3IyJy-is&feature=youtu.be Newton, C. (2014). Non Ferrous Metals. Retrieved from http://www.youtube.com/watch?v=EDtxb7Pgcrw&feature=youtu.be