* Eliminate hazards where feasible (eg. if specifying roof lights specify non-fragile materials);
* Reduce risks from those hazards that cannot be eliminated (eg. specify designs and coatings for materials at height to reduce the need/frequency for replacement, cleaning and re-painting);
* Provide information on residual risks if they are significant (eg. if a set sequence of assembly or demolition is required to maintain structural stability).
In order to do this a competent designer will need knowledge and experience of the construction process.
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