Extensible support bolt, supporting method, use of the bolt.

摘要

The shank (1), between the threaded part (13) and its second end (10), is surrounded by a tube (4) made of a deformable material. The particular shape (10) of the second end of the shank has a diameter (D) greater than the internal diameter of the deformable tube (4). A collar (6) of diameter greater than the external diameter of the deformable tube (4) is attached firmly to the shank (1). Application to roof supports. <IMAGE>