Distributing point reinforcement between special stirrups autocad structural detailing 201312/28/2022 Also the resultant column-free space generally adds value to a project. Consider larger bay sizes, where the extra weight due to longer spans may be totally offset by the reduced price per tonne and the saving in number of columns and related workmanship. number of pieces per tonne), which is largely dependent on bay size. Structural steelwork prices are influenced by the size of each individual piece (i.e. (Image courtesy of Kingspan Structural Products) Additional project specific clauses, more demanding tolerances, and additional testing will increase costs. multi-storey, portals, trusses.Ĭonformance with the National Structural Steelwork Specification for Building Construction (NSSS) will reduce uncertainty. Some relate to the complexity of the particular project, whilst others are specific to the type of project, e.g. There are a number of general "technical" factors to consider in terms of design for economic fabrication that apply to most building projects. 7.4 Steel Construction Building Information Modelling (BIM) Charter.7.3 Steel Construction Sustainability Charter.7.2.5 National Highway Sector Schemes (NHSS).7.2.4 UKCA Marking and Factory Production Control (FPC).7.2.3 Occupational Health and Safety Management System Certification (HSM).7.2.2 Environmental Management System Certification (EM).7.2.1 Quality Management System Certification (QM).7.2 Steel Construction Certification Scheme.7.1 BCSA Steelwork Contractor membership.1.6 Quality of engineering and documentation. This results in significant benefits both to the client and main contractor. The fact that machinery has taken over from the tape measure means that the frame is produced to high quality standards which are reflected in the speed and accuracy of steel erection on site. The accuracy of the computer generated details being transmitted directly to the computer aided manufacturing (CAM) machinery increases the quality standards of production Most modern steelwork fabrication factories have computer aided design and detailing (CAD) which is linked directly to factory floor computer numerically controlled (CNC) machinery creating a genuine CAD/CAM environment. Sections and plate girders may also be strengthened by stiffening the web or flanges depending upon the load to be carried. In this case, built-up girders may be fabricated from plate. The frame generally uses readily available standard sections that are purchased from the steelmaker or steel stockholder, together with such items as protective coatings and bolts from other specialist suppliers.Īlthough a wide range of section shapes and sizes are produced, the designer may find that the required section size is not available. Fabrication is the process used to manufacture steelwork components that will, when assembled and joined, form a complete frame.
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