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Steel Designers' Manual - 6th Edition (2003)
High-rise multi-storey
The breakdown shown in Fig. 32.3 incorporates the following adjustments:
(1) the steel grade has been taken as S355 with an allowance for cambering,
(2) the paint system generally is shot blast and 75 mm primer, 10% of steel coated
with 100 mm primer,
(3) no allowance has been made for any concrete-encased beams or stanchions,
(4) transport includes for off-site stockpiling, bundling and out-of-hours delivery to
site (city centre sites often incur these costs).
This sector of the market has a very different cost profile to those already shown.
Raw steel still dominates but erection charges have now overtaken the fabrication
element. This type of steelwork lends itself particularly well to automated fabrication
techniques featuring drilling lines.
design and drawing 5%
paint and touch-up 4%
project management 4%
Fig. 32.3 Cost breakdown: high-rise multi-storey
Lattice structures
Economy of fabrication 951
fabrication 10%
This is perhaps the most difficult of the sectors on which to carry out an analysis as
lattice structures vary enormously in size, complexity and element make-up. The
costs shown in Fig. 32.4 are indicative and incorporate the following:
(1) angle booms and lacings,
(2) welded joints without gusset plates,
(3) transportable lengths and widths with full-depth splices only.