Pre-Cast Concrete

Introduction

In specifying the use of pre-cast concrete in his design the designer should be aware of, and assess the risks from, the following principal hazards.

Possible hazards and risks

• lifting and handling should be taken into consideration when specifying the shape, height and weight of the unit
• crushing caused by immaturity of concrete unit in lifting or by inadequate lifting points
• falling from height whilst accessing, locating, or fixing units
• collapse of pre-cast units may occur if not propped to carry the in-situ topping and temporary load or if it is unable to carry loading

Some design considerations

The specification of pre-cast concrete for use in a construction project requires the consideration of:

• a clear definition of the designer's preferred construction sequence to the principal contractor in the construction phase plan
• can the units be easily transported and lifted to their likely positions from the transporter to avoid double handling?
• specification of how the units are to be protected, handled, lifted and positioned and specify lifting points
• minimise and simplify locating and fixing procedures and details especially at height or depth
• detailing of reinforcement cages should identify lifting points