HYSON-CELLS

Canals and stormwater

Side drains to remove water from roads

• In this example the drain butts with a kerb on the right hand side. The left hand side is unrestrained and so potential edge damage to the drain is inhibited by means of a “tuck-in” terminating beam. This prevents undermining and provides extra load bearing along the edge.
• Strength of concrete is determined by design flows (where the main factor is the fall of the drain) or else the load bearing needed to take traffic.
• Dish “parabolic” profiles are preferred to “hard edge” trapezoidal profiles and are easy to excavate with machines. (If the engineer’s calculations were based on a trapezoidal cross-section then we would simply “round the corners” as in the photo)
• Hyson Cells drains can be trafficked
• The drain profile can be blended into the road camber to give a safe traffickable design. Hyson Cells roads and drains can even be cast as an integral unit.