Concrete manhole PREFORMED SYSTEM

Marshalls CPM has developed an off site large modular manhole system that is designed to speed up the installation of the manhole whilst providing a safe working environment for personnel working within the manhole. The benefits of the wide wall section include: An established and proven product range that is Quality Assured The chamber is supplied with a reinforced cast-in base. The chamber system provides performed inlet and outlet holes to suit pipe requirements The chambers are manufactured in fixed steel moulds that give a superior dimensional accuracy. Wide wall chambers have an inherent structural concrete strength with a 120 year design life. Chamber units are supplied with cast-in brackets for a lifting loop system. AutoCAD drawings can be provided Kitemarked product range Product specifications include: Chamber sections are available in 2100mm, 2400mm, 2700mm, 3000mm, 3660mm and 4000mm diameters The chamber sections can be supplied in 500mm, 750mm and 1000mm depths. All chamber sections are manufactured to the requirements of BS5911-3, 2100mm, 2400mm, 2700 and 3000mm are kitemarked. The base chamber is manufactured with a 200mm deep; grade C40, reinforced concrete base doweled into the chamber unit. Concrete has a minimum cover to reinforcement of 30mm. Chamber units can be bolted together using a minimum 4No T16 Grade 8.8 continuous threaded rods if required. The inlets and outlets are either pre-scored, pre-formed or cored holes (depending on size) to suit the customer’s requirements. Cover slabs are manufactured to the requirements of BS EN 1917:2002 and BS 5911-3:2010