Fig. 266.
Another way sometimes adopted when you have one or two stout timbers on hand or already in position for the posts is to screw two upright cleats of plank to the inner side of each timber, thus forming the groove for the bar, as shown in section in Fig. 267.
Fig. 267.
The uprights can now be fastened in place, taking care to have them exactly vertical and in line with each other. The distance apart will depend on the length of the bar. The uprights can of course be mortised into the floor, or the wood-work above, if the conditions admit, but it will usually answer every purpose to hold each end in place by four cleats firmly screwed to the floor or ceiling. It is usually simpler to have these uprights extend to the ceiling, but this is not necessary, and in some cases it may be advisable to brace them to the floor only, by wooden or iron braces, in some of the ways already shown, or they can be guyed with wire rope and turnbuckles.
Fig. 268.
Fig. 269.