Minimum cover table B below reflects industry standards (AS/NZS 2566.2:1998) in the minimum cover recommended.

Loading ConditionMinimum cover (m)
Not subject to vehicular loading 0.3
Land zoned for agricultural loading 0.6
Subject to vehicular loading  
(a) no carriageway 0.45
(b) sealed carriageway 0.6
(c) unsealed carriageway 0.75
Pipilines in embarkments or subject to construction equipment loads 0.75