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parallel-chord truss gets its name from having parallel
top and bottom chords. This type of truss is used for
floor construction, and is generally referred to as
a "floor truss".
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There are several significant advantages
to using floor trusses:
- Floor trusses can be manufactured in long spans, reducing
or eliminating the need for intermediate bearing walls,
beams, columns or footings.
- The open webs allow for easy passage of ducts, plumbing
and electrical wires within the system. No cutting of
webs is required and you don't need to fur down to hide
materials.
- Special bearing, cantilever and balcony details are
easily built in.
- Stiffness can be designed into the floor truss, creating
a more solid floor.
- Labor costs for mechanical contractors are lower.
- The 3.5 inch width allows for quick gluing and accurate
nailing or screwing.
- Cold air returns can be eliminated by using the open
web system as a plenum for air distribution.
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