Alex this is actually not true of trusses.
Floor truss vs i joist bounce.
Some of the small gain is due to the continuation of the replacement of solid sawn joists.
But it is true of i.
The floor above will be stiffest if you place the wall in the middle of the joists.
While there are no interior walls bearing on the floor system and no excessive notching in the i joist flanges and the joists fall well within the apa s allowable span guidelines my clients say their floor is excessively bouncy.
This reduces the need for interior bearing and provides space for hvac plumbing and electrical systems within the floor panels our custom designed floor truss systems reduce the amount of bounce that can be found in conventionally framed floor joist systems.
Steel is also a non renewable resource manufactured with great energy consumption.
However most of the increase results from the national builders market share growth.
To take weyerhaeuser s trus joist span tables as an example 17 feet 2 inches is the maximum span with an l 360 deflection ratio allowed by code for a floor that s framed with the company s 9 inch deep nominal 2x10 series 110 tji joists spaced 16 inches on center.
Floor trusses are able to span farther than dimensional lumber and even i joists.
Correcting a bouncy i joist floor.
Q instead of glue and nails my framing subcontractor used screws to fasten the sheathing to the i joists of a new 14 foot wide addition.
I just did some checking to confirm.
The first story of my house has a bouncy floor.
The advantages of open web floor trusses are beginning to decelerate the growth of ewp.
January 12 2016 at 8 38 am.
The subfloor is glued and nailed to the i joists with no bridging between them.
The one thing con you forgot to consider with floor truss vs traditional joists is that they are much weaker in a fire situation and will collapse long before a traditional floor joist will.
The biggest advantage in my opinion in using i joists is simple.
The longer the distance a joist spans without support the more it will flex.
Though i joist sales per housing start have increased about 6 over the last two years the trend has slowed considerably.
Plated floor trusses are very heavy present a handling danger because of sharp plate edges and plates often interfere with the installation of mechanicals.
By building a wall under joists you divide the span.
O c spanning 20 ft.
With floor trusses being built this way to begin with it was a huge step for the world of i joists.
If you build a wall to support joists be sure to place a stud directly and tightly under each joist.
By thor matteson issue 166.
Craig muir potomac falls va.
Steel plated floor trusses vs the open joist triforce.
