Week 06 Summary Top surface sloped towards drainage
Collect rain water
Sheltering
Concrete slab
Rafters
Roof system
Flat trusses Waterproof membrane
Trusses
Decking
Pitched and sloping roof
Flat roofs
Joists
Beams
Hip roof 3D plate type Gable roof Timber
Space frame
Light frame roof Frame
Steel
Trussed roof
Flat
Primary and secondary roof beam Flat
Structural steel framed roof
Roof beams and purlins and lighter sheet metal roofing
Sloping
Beams and columns connected by rigid joint
Portal frame
Gable Cheap Steel
Iron
Alloys
Wrought iron
Ferrous
Expensive
Cast iron
Steel
Metals Non-Ferrous Metal Steel sheeting
Tin, Lead, Zinc, Copper, Bronze, Aluminum
Structural steel
Hot rolled Cold formed
Framing
Stainless steel When load is applied on a triangular frame, take off one side to determine whether it’s compression/tension
Roofing
Critical vertical load
Cladding
Gutter Tiled Roof A certain pitch allows water to flow. Should be constructed at pitches greater than 15.
Flashing Zincalum = zinc + aluminum
E = modulus of elasticity I = area moment of inertia L = unsupported length of column K = column effective length factor KL is the effective length of the