Lighting or flag mast ground fixing uses foundation tube driven into ground by tipped striker bolt followed by mast concreting into tube to stand vertical..

摘要

The foundation tube (1) is driven into the ground (3) by striker (2) and the striker then removed so the mast can be screwed or concreted etc into or onto the tube. The tipped (5) striker bolt (2) is introduced axially into the tube prior to grounding so the bolt tip (5) protrudes beyond the bottom end of tube (1,6) and the bolt is conically expanded at its non-tip end to give a stop edge to be placed to the top end of the tube before driving into the ground. The mast is fixed to a mounting plate (11) by anchor screws and the plate is welded to the tube.