Figure 1-28. Types of sills.
x 10 stock, place pieces on the saw horses and nail
together. Use the piece of stock that has the least
amount of wind or warp for the center piece and nail
other pieces on sides of center stock. Square off the
ends of the girders after the pieces have been nailed
together if necessary. If the stock is not long enough
to build up the girder the entire length, the pieces
must be built up by staggering the joints as in the
case of the built-up sills (fig. 1-27). Girders are often
built up by placing two or more joists side by side
and nailing them together. For a girder of two joists,
16-penny nails should be used; for a girder of three
joists, 20-penny nails should be used; and for girders
Figure 1-29. Protecting girder with hardwood
of four or more joists, 20- or 30-penny nails should
bolster.
be used. The nails must be placed about 1 1/2 inches
from the top and bottom edges of the joist, spaced
straight and sound. Square off ends of stock, if
about 24 inches apart, and staggered; they should be
necessary. If the girder is to be built up of 2 x 8 or 2
driven from both
1-32
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