Hume Box Culverts should be laid on prepared bedding (preferable compacted sand bedding). However, in bad ground, it may be necessary to excavate deeper or provide piled foundation and place a layer of hardcore before placing the sand bedding.

Backfilling around culvert units should be done after the lid of the culvert has been installed and it should be carried out in even layers on both sides simultaneously.

STACKING

All inverts should preferably be stocked uniformly on level ground. Lids should be supported with timber bearers at the both ends and not at the centre.