SIDEWALL CONVEYOR BELT

A sidewall (or 'corrugated sidewall') conveyor belt is a specialty belt engineered to convey loose bulk material at incline angles far beyond the limit of a smooth or chevron belt. Two flexible, accordion-folded rubber sidewalls — typically 60 to 400 mm tall — are vulcanized along each edge of a standard fabric carcass, and transverse cleats (T-shape, TC-shape or C-shape) span the gap between them. Together the walls and cleats form a series of moving pockets that physically retain the cargo, eliminating slide-back even on fully vertical lifts.

Designs cover incline angles from 30° up to a true 90° vertical, with practical maximum cleat heights of roughly 60 % of sidewall height. Belt widths run 400–2400 mm; effective carrying width is the cleat span (typically 100–300 mm narrower than belt width). The base belt remains a conventional EP fabric (commonly EP 250–EP 1000), and the cleat pitch is selected against the bulk density and lump size of the cargo. Sidewall belts replace bucket elevators and screw conveyors in port shiploaders, cement plants, sand pits, fertilizer plants and recycling lines where short footprint and high lift are needed without transferring through multiple flights.

Designers must remember the back of a sidewall belt remains flat, so it runs over standard pulleys and idlers — but minimum pulley diameter rises to accommodate the bonded sidewall, and special tail and snub geometries are required to keep the walls from buckling. Capacity is computed from cleat pitch × pocket area × belt speed, rather than from the troughed cross-section used for ordinary belts; the [incline angle calculator](/tools/conveyor-incline-angle-calculator) handles the steep-angle case.