We manufacture anchor clamps used for power transmission. A tube and clamp scaffold system includes a series of anchor clamp which are attached by the workers during erection of the system. The anchor clamps are attached at appropriate positions to ay of the tubular members and provide a fastening connection for the hook of a safety lanyard. In this way, the worker secures anchor clamps as the system is erected and fastens his safety lanyard to the appropriate anchor clamp. As the height or length of the system increases, a new anchor clamp can be secured. The anchor clamps are fast to secure and preferably secured in the same manner as clamps used to secure the tubular members.