Patent ID: 6398455
Filing Date: 2002-06-04
Classification: A63C,E01C

Abstract:
A method for stratified construction of a grass pitch of the football ground type, the grass pitch having a plurality of horizontal layers and being suitable for being heated by a heating plant by which heat energy is supplied to a gas, said method comprising the steps of:forming a first underlying layer (2); laying an insulating layer over the first underlying layer (2); forming at least two substantially horizontal, adjacent but essentially separated, cavity layers (4,6) extending across substantially the area of the grass pitch above the insulating layer, a lower cavity (4) being suitable for receiving heated gas from the heating plant, an upper cavity (6) removing gas; casting a layer (7) of load-carrying castable material on an upper surface of the upper cavity layer; placing a second underlying layer (8) on the cast layer, the first and second underlying layers forming a draining mass for the grass pitch; placing a draining pipe system (11) in the second underlying layer (8); and positioning an uppermost grass growing layer (10) above the second underlying layer (8).