| 摘要 |
An extendable vertical support for attachment of a safety line, e.g. during erection of scaffolding, comprises a lower support section 602 and an upper support section 610 received within section 602 and telescopically adjustable, the lower section defining an aperture 606 configured to receive an internal support section 605, 612, through said aperture. The internal support section may be attached to upper section 610 by a screw thread (Fig 5, not shown) and further sections may be screwed thereto; as shown in fig 6a the upper section may consist entirely of joined internal supports 605. Alternatively, the upper section 610 may simply stand upon a pile of internal support sections 612. The arrangement allows the attachment point of the safety line (the eye at the top of the column) to be raised whilst the workman remains attached. |
