| 摘要 |
A ladder safety device comprises stand-off means (20) for bearing against a roof (16) of a building (18) to maintain the ladder out of contact with the building. The stand-off means comprises a pair of substantially rigid arms (122) which diverge away from one side of the ladder so that the separation of the arms at their free ends is substantially greater than the separation of the ladder uprights. A respective X-shaped load spreading member (128) is mounted to the free end of each arm for rotation about two mutually perpendicular axes. |
