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In developed countries, the space below ground is littered both with debris from past construction and with utility services – some active, some redundant. Risks from overhead services mostly relate to power lines, which may be fouled by crane jibs, scaffolding poles or plant. This short article discussed how the associated risks are best controlled.

In the first of a two-part article, Sean Brady takes readers through the chain of events that led to the collapse during construction, with 75 deaths, of the Quebec Bridge.

Peter Harris is impressed by the comprehensive subject matter and clear illustrations of this introduction to building construction, which would be of value to both students and practising structural engineers.