Steel villa frame house

For most projects, the decision on the frame material choice and form happens early in the design process, often on the basis of early design principles, limited information and budget costings. Once selected, the frame material is unlikely to change, as to do so can have significant programme implications from the consequential impact on the design of other major elements, such as claddingservice installations etc.

While the decision on frame type for most developments will not be based on cost alone, it is nevertheless a key consideration in the decision making process and it is vital to support informed decision making with realistic cost information at this early stage, before refining during the detailed design stages. This is a challenging task as the cost of structural steel may fluctuate through the economic cycle, and reconciling material price information with returned tender prices is not always straightforward. Steel frame costs are also heavily affected by project specific key cost drivers, such as programme, access, spans and building form, making accurate adjustment of recently tendered rates or cost models difficult.

For those with limited previous experience of steel framed construction, the unique characteristics of the sector may not be immediately apparent. Anecdotal stories point to design decisions being made on the basis of non or poorly adjusted historic steel rates, suggesting that the complexities of the industry and the significance of key cost drivers are not necessarily widely understood.

Steel’s high market share of just under 70% and a review of recent industry trends highlights the importance of maintaining current, market tested cost advice for structural steelwork. Through a consideration of a number of key factors and consultation with the market and supply chain, budget structural steel estimating can be quickly and successfully tailored to specific projects.

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