Open-Web Floor Trusses

Builders are discovering that floor trusses are the solution to many of their floor framing problems. They find floor truss installations result in high quality, squeak-free construction with the added benefits of reduced framing time, waste, pilferage, and callbacks. Design versatility and open web spaces are becoming tremendous advantages to builders of today's complex and sophisticated homes. The fact that floor trusses are built with 2x4s or 2x3s oriented 'flatwise' means a wide, stable bearing surface that is easier to work on and around. Typical depths for floor trusses are 12" to 24" but more shallow or deeper configurations are possible.

   

Shrinkage, warping or twisting are minimized, reducing the potential for callbacks to the job site.

The wide nailing surface provides for easy gluing and quick, accurate attachment of sheathing, reducing squeaks and improving floor performance for the life of the structure.

Long spans and girder truss options reduce the need for intermediate bearing walls, beams, columns or footings, saving time and construction costs.

Spacings at 19.2" or 24" o.c. maximize structural efficiency and speed of installation.

Stiffness and strength can be designed into the floor truss, creating a more solid floor.
 

While floor trusses may cost more per lineal foot, over all you save more money due to reduced installation time and wasted material. The Framing the American Dream project showed how efficiently a trussed floor could be installed on a 2600 sq. ft. house:

Frame Type:
Hours to frame
Quality of Lumber
Stick frame
38 hours
4,256 board ft.
Floor Truss
12 hours
3,147 board ft.
Using floor
trusses saves
26 hours
1,109 board ft.
Special Bearing, cantilever, and
balcony details are easily built in.
The open web configuration leaves plenty of room for plumbing, electrical, and mechanical runs.
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