Floor Truss Bridging

If span is greater than 16 use more than one pair.

Floor truss bridging.

Intervals one run for a 20 ft. If span is greater than 8 install on 2x8 or larger joists. Floor truss is designed and produced to your specific needs and delivers reliable performance. The load sharing element is typically considered to be the floor diaphragm.

Floor joist bridging is critical to the structural strength of a floor as shown in figure 1. U section bridge under hung floor beam generally for shorter spans. The catch of course is that the bouncy floor joists must be accessible from below. The 2x6 serves the same purpose as bridging in a standard floor distributing concentrated loads over a wider area.

Lay the new sheets perpendicular to the floor joists and orient panel ends over joists. 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. All open joist truss layout plans include strongback bridging specification and location. Bridging allows each joist to share weight with its neighbors and can cut deflection how much the joists flex by half.

Tension bridging works only in tension so must be used in cross pairs. Underneath 2x6 strongbacks laid on edge should run continuously through the webs of all the trusses at 10 ft. Strongback bridging system dampens floor vibrations. I ve always used a lift for upper floors though.

Support floor joists with a depth to thickness ratio of six or more with bridging at intervals not exceeding 8. Floor truss open concept allow the installation of strongback bridging which actively contribute to reduce floor vibration. 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. 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.

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. 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. Bottom of the floor joists instead of or in addition to being installed on top. The code does recognize load sharing through the value of cr.

Truss two runs for longer trusses.