extensions in the soil the extensions are inserted until the jacking lug becomes embedded in the soil in the preferred embodiment the jack 40 is a hydraulic cylinder or a porta power cylinder obviously any other mechanical or pneumatic jack may be employed which will conveniently fit into the hole the pump may be a hand pump or any other source of hydraulic power during insertion of the extension plates it may be necessary to temporarily bolt the extension plates lightly to the base plate in order to maintain alignment and prevent excessive cocking this stop bolt is not shown and is removed after the plate insertion step at final assembly the thrust washers 26 are rotated so that their slots 27 are at an angle to slots 20 and 22 of the base 10 in order to provide for even load distribution the method of anchoring basically utilizes a jack against an extension plate which acts against the side of a hole in the ground and a system for locking the base plate and extension plates together after insertion the method involves excavation of a hole which is slightly larger than the base plate 10 placing thrust washers 26 in the hole with their open ends facing the center placing the base plate 10 in the hole.