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Floor Joist Bridging |
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The Importance Of Floor Joist BridgingFloor joist bridging is critical to the structural strength of a floor. 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.
Yet it is not uncommon to find bridging not properly installed or missing all together. Why does this happen? There are a couple of reasons.
Although not as good as solid or cross bridging, a 2 X 4 supporting the duct work would provide more support and load sharing than a light piece of metal.
Bridging should be installed between floor joists in both indoor and outdoor applications including decks. A common mistake when installing solid bridging is to offset the bridging. The reason that this is done is to make it easier to nail the bridging to the floor joists. However, it is not the nails that truly provide the transfer of the load and prevent the twisting and warping of the floor joist. It is the strength of the bridging material itself.
When installing cross bridging, the bottoms and tops of the cross bridging lumber should be directly opposite themselves.
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solid bridging between floor joists |
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cross bridging between floor joists |