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.
In basic gable roof framing, rafters slope upward from the tops of the building's exterior walls and meet at the roof's peak, or ridge. The ridge board is a horizontal timber that serves as a nailing surface for the upper ends of the rafters but in most gable roofs does not bear any of the roof's weight.