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Section Hazard / risk Default risk level Default residual risk Default control measure

In addition to planning at the design stage, control measures to avoid the collapse of the steel structure during erection include: The sequence of propping, structural steel install and demolition needs to be designed, maintained, cleared by the engineer and adhered to at all times. Making sure all beams are secured before releasing slings and all bolted connections are effective to stabilise the structure. Adhering to design specifications, or where this is not possible seeking further advice from the designer. Starting erection in a nominated braced bay so the building can be plumbed and made self-supporting to further support the erected steelwork. If this is not possible, ensure the erection engineer is consulted on developing an alternative site-specific sequential erection procedure. Verifying the footing concrete has reached the specified strength before erecting columns and checking fittings for supporting columns are adequate for the structural capacity of the erection conditions. Verifying the stability of the structure at the end of each workday, when fastenings may be incomplete, and during strong winds. Seeking approval from the erection designer to stop work at unscheduled points when the structure has not been completed to the specifications of the erection design. Obtaining written approval from the erection engineer before loads are placed on the structure.

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