Fig. 30
The necessary repairs can be carried out by means of boats, cradles, or scaffolding.
Cradles and boats are swung from balk timbers laid across the top of the shaft, or from hooks where the design of the chimney permits, as shown in [fig. 31].
The common method of fixing light scaffolds round a chimney or steeple is shown in [fig. 32]. They are most easily fixed to square or other flat-sided erections. The scaffolder having by means of ladders or boats reached the desired height, fixes a putlog by means of holdfasts to one of the walls. Another putlog is then fixed on the opposite side of the building at the same level. The two are next bolted together by 1-inch iron bolts of the required length. The bolts are kept as near to the wall as possible. The process is repeated again about 6 feet higher on the building. The boards for the platforms are next laid. The first are placed at right angles to the putlogs and project sufficiently to carry the boards which are laid parallel to the putlogs. To prevent the boards rising when weight is applied at one side of the scaffold, iron plates bolted together ([fig. 33]) are fixed at the corners, and clips ([fig. 34]) connect them to the putlogs.
Fig. 31
Fig. 32
Fig. 33