6. Permanent bracing, which the author calls lacing, is
installed at specific locations identified in plans from the
Lacing. Truss companies
provide plans that show where various permanent braces are
meant to go. On production job sites, truss crews are usually
well versed in bracing a standard plan, but these documents are
necessary if the house is a new plan or a one-of-a-kind job.
Building inspectors always check to make sure the lacing is in
order after a roof is up (Figure 6).
7. Truss tails are marked with a string (top)
and cut plumb.
Use a chalk line to mark the lengths and a bevel square to
mark the tails at the necessary pitch. If the roof is long, I
mark pencil lines along the string (instead of snapping the
line) to ensure a straight eaves line.
The final operation is straightening the barges and end
trusses. One person can eye up the gable end from the ground
and direct the other to spots where it has to go in or out.
Nail a 2-by kicker to the side of the top chord at these points
and angle it down to the bottom chords. Then nail a 2-by flat
on the top of the bottom chords and extend it from the end
truss back several trusses. Rest the gable kicker on this
bottom nailer and move the kicker until the adjustment looks
straight from the ground, then nail it off. Several kickers may
be necessary to tame the gable and barge.
With good prep techniques, standing a modest-sized truss
roof is a single day’s work. Due to the vast regional
differences and building requirements, many aspects of trusses
are not covered here. But one thing always remains the same: A
carpenter is more efficient on the ground than climbing up, on,
and around trusses. Learn to accomplish as much as possible on
the ground before setting off eagerly to make a show out of
raising a bunch of trusses, only to find yourself bogged down
finishing off the details.
Don Dunkley is a construction supervisor and frequent
JLC contributor who hails from Cool, Calif.