Fig. 17
On the ledgers, and at right angles to them, putlogs are laid, resting outwardly on the ledgers and inwardly on the wall, where header bricks have been left out for their reception.
Fig. 18
The putlogs, which are placed about 3 or 4 feet apart, should be tied to the ledgers and fastened by wedges into the wall. This is not often done, but at least one putlog to every tying between standard and ledger should be so treated.
Where the putlogs cannot be carried by the wall owing to an aperture in the building, such as a window, they are supported by bearers fixed as shown in figs. [19] and [20].
Fig. 19
