Reinstalling the treble’s rope boss (2011 Nov) was dangerous for the person balancing at the top of the ladder, because the rope bosses are located so far out from the wall. It was clear that for safety’s sake the tower needed a ladder standoff, a device to hold the top of the ladder out several feet from the wall, under the rope bosses.
A little investigation showed that commercially available ladder standoffs are not suited to our needs, being designed for painters and gutter installers working around house eaves. Because three of the ringing chamber walls are interrupted by tall windows, the standoff needs a base wide enough to span from a corner over to the opposite side of the window, or approximately eight feet.
Over the intervening months Thomas built a ladder standoff suited to the tower’s particular needs. It is wooden, mostly of 1x3s stiffened with 1x2s glued and screwed at right angles in an L or T beam configuration. Its two major sections, the 8′ wall beam and the square frame, separate for storage and are connected with two bolts. The square frame is clamped to the ladder by two faces shaped to match the channels of the ladder, and clamped to the frame by three bolts each. Tomorrow we’ll try it out for reattaching the remaining rope bosses.