Why temporary structures are used

Temporary structures are used because many building operations cannot be done safely or at all without them:

• Safe working at height: scaffolding gives masons and painters a stable platform.
• Shaping concrete: formwork gives the wet concrete its shape until it gains strength.
• Protecting the excavation: timbering prevents collapse of the trench sides and protects workers.
• Supporting weak structures: shoring and underpinning protect adjacent walls and buildings during excavation, repair or alteration.
• Speed and economy: formwork can be reused many times, scaffolds are cheap and removable.
• Quality: proper support gives correct alignment, level and finish of the work.

They are dismantled once the permanent work is complete and can bear its own load.