Floor Truss Bridging

Strongback bridging system dampens floor vibrations.

Floor truss bridging.

The 2x6 serves the same purpose as bridging in a standard floor distributing concentrated loads over a wider area. Ansi tpi 1 2002 includes information in the commentary to section 7 5 2 4 regarding the use of strongback bridging to reduce the effects of differential deflection in floor trusses. If span is greater than 8 install on 2x8 or larger joists. The addition of this important structural component allow the individual.

Underneath 2x6 strongbacks laid on edge should run continuously through the webs of all the trusses at 10 ft. The catch of course is that the bouncy floor joists must be accessible from below. I ve always used a lift for upper floors though. However some people add additional bridging to try and stiffen the floor and provide additional load sharing or to brace the joists per nds 4 4 1.

Intervals one run for a 20 ft. The load sharing element is typically considered to be the floor diaphragm. The code does recognize load sharing through the value of cr. Lay the new sheets perpendicular to the floor joists and orient panel ends over joists.

Tension bridging works only in tension so must be used in cross pairs. Bottom of the floor joists instead of or in addition to being installed on top. Even if your floor already has a row of bridging running down the center you can stiffen it substantially by adding two more rows. Bridging allows each joist to share weight with its neighbors and can cut deflection how much the joists flex by half.

Proper bridging distributes the load on the floor to other joists and over time prevents floors from sagging and squeaking do to floor joists twisting and warping. Floor truss open concept allow the installation of strongback bridging which actively contribute to reduce floor vibration. Floor joist bridging vs blocking i like laying 1 1 8 super flat easy to pound t g together dropping a 2x6 from a floor above doesn t put a hole in it. U section bridge under hung floor beam generally for shorter spans.

Details to minimize the chance of future squeaks and to help secure the new floor sheath ing start by spreading a generous amount of construction adhesive over the old planks. Pony or pratt truss bridges are half through truss bridges no overhead members box or full through truss overhead members two types of pony truss configurations. Support floor joists with a depth to thickness ratio of six or more with bridging at intervals not exceeding 8. Truss two runs for longer trusses.

All open joist truss layout plans include strongback bridging specification and location.