Assertion: trial pit | /r/HasProperty | deeper than 1.2 m
Facets:
Source sentences:
text: They can be excavated by hand or using a backhoe excavator, generally to a depth of up to 3.5-4.5 m. If a trial pit is deeper than 1.2 m and is intended to be entered by people, it should be made secure against the possibility of structural collapse.