Intalation of the Interhol manhole
PE and PP manholes must be set on a hard sandy surface, and to use material that fits on lateral charging or fillings (compression). The dimensions of the separated material should be from 0 to 32 cm, and the dimensions of the crushed material should be from 0 to 16 cm.
The surface should be made in layers of 15 to 20 cm and filled (compressed) to 97% by Procter. In case of presence of ground water, the surface should be 30 cm made of concrete MB 15. Due to low weight the manual installation is possible, in case of machine handling tying the ropes and ribbons is allowed only around the button, bases manhole or to apertures intended for it.