Canary Wharf is a major business district in east London, within the London Borough of Tower Hamlets. It is one of the United Kingdom's two main financial centres â along with the City of London â and contains many of Europe's tallest buildings, including the second-tallest in the UK, One Canada Square.[1][2]
Trusses and rafters are both assembled ahead of being installed onto the roof. Trusses are assembled in a factory using pre-engineered structures and joints. On the other hand, rafters are assembled at the construction site. As trusses are assembled in a factory, a lot of time can be saved.
Rafters are found on steep roofs (slope of more than 2 in 12). Rafters are typically 2 by 4's, 2 by 6's, 2 by 8's or 2 by 10s. The rafters support the sheathing and typically run from the roof peak down to the eaves. The rafters carry the dead load of the sheathing and roofing material, and the live loads above. Rafters may also carry the ceiling loads below on cathedral ceilings. Roof joists are found on low-slope roofs (slope of 2 in 12 or less). Their functions are similar to rafters.