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SST
Purlin is a structural open web plate truss ideal for panelized roof systems.
Its long span high load carrying capacity
is achieved by the engineered combination of face bonding (gluing) and machine
stress-rated (MSR) lumber which is finger jointed and tension tested as a continuous
member. The webs are manufactured from visually
graded or MSR lumber. All multiple web members are face bonded (glued) in accordance
with ANSI A190.1. The webs and chords are
assembled and connected with ICBO-ES approved connector plates that are embedded
in the wood components by a series of precision presses. Moisture content of all
lumber is limited to 15% for maximum product stability. Performance
Features - Longer span capacity yields greater
design flexibility
- Wider bay designs resulting in fewer
columns
- Camber as required by designConventional framing
width of 3 1/2 reduces the span of the sheathing allows for more nailing
- Parallel
chord, single or double taper designs available
- Continuous,
tension tested chords, laminated when multiple plies are utilized
- Light
weight and dimensionally stable
- Open web allows easy installation
of mechanical, electrical, sprinkler and other trades
- Includes
factory installed split resistance top chord (R Chord) allowing for tight diaphragm
nailing (see R Chord Specifications)
- Allows
for direct connection for lateral design load transfer
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