Factors Influencing Choice of Form - Multi-Storey Buildings.

Environmental   There are a number of factors which influence the choice of structural form that are particular to the site location. These can have a dominant effect on the framing arrangement for the structure. The most obvious site-dependent factors are...


Building use   The building use will dictate the planning module of the building, which will in turn determine the span and column grids. Typical grids may be based  on a planning module of 600/1200mm or 500/1500mm. However, the use has much...

Floor loadings   Because steel-framed buildings are relatively light in weight, excessive imposed loadings will have a greater effect on the sizing of structural components, particularly floor beams, than with reinforced concrete structures. The floor loadings to be...

Building services and finishes   In buildings requiring anything other than minimal electrical services distribution, the inter-relationship of the structure, the mechanical and electrical services and the building finishes will need to be considered together from the outset. It is...

External wall construction, Lateral stiffness, Accidental loading   External wall construction The external skin of a multi-storey building is supported off the structural frame. In most high quality commercial buildings the cost of external  cladding systems greatly exceeds the cost of the structure. This influences the design...

Cost considerations   The time taken to realize a steel building from concept to completion is generally less than that for a reinforced concrete alternative.This reduces time-related building costs, enables the building to be used earlier, and produces an earlier return...

Fabrication   The choice of structural form and method of connection detailing have a significant impact on the cost and speed of fabrication and erection. Simple braced frameworks with bolted connections are considered the most economic and the fastest to build for...

Construction   period of around 8–12 weeks is usual between placing a steel order and the arrival of the first steel components on site. Site preparation and foundation construction generally take a similar or longer period (see Fig. 2.11). Hence, by...

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