Concrete used in the manufacture of these pits often contains a proportion of recycled aggregate. Custom-made pits enable onsite work to finished very quickly. Precasting eliminates costly, time consuming and dangerous work on site. Clients requiring precast pits provide civil engineering data in the form of a pit schedule, long sections and face plan. From this information, surface levels, pit orientation, pit depth and pipe opening levels and diameters can be obtained.
Pits are custom designed and precast to suit the job.
Although not a difficult design and drafting job, creating the drawings for custom pit formwork used to be a real bottleneck in job turnaround. Accurate and complete information is essential in the factory to build pits right first time, every time, particularly where complex designs are involved. Depending on design requirements, the pits can be small enough to be moved about by one person or large enough to require a craning into place on-site. Pipe penetrations can vary for level, diameter and angle. Various options can be allowed in manufacture such as the provision of lifting points, step rungs or other access systems and provision for a variety of different lid types.