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Old 09-29-2012, 08:00 AM   #1
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What is this crossbracing on my floor joists?


Just wondering what purpose this serves (see attached photo). It's about 7' from the wall only on one side of the house.
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Old 09-29-2012, 08:48 AM   #2
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What is this crossbracing on my floor joists?


Check out this website, it pretty much explains all you need to know about cross bracing.

http://www.homeadditionplus.com/fram...oor_Joists.htm

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Old 09-29-2012, 10:38 AM   #3
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What is this crossbracing on my floor joists?


If needed now a days we add blocking mid span of the floor joists instead of the cross type bracing. It keeps the joists from twisting and moving over time.
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Old 09-29-2012, 11:46 AM   #4
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What is this crossbracing on my floor joists?


x bracing adds much more strength to the floor as compared to blocking. also x bracing completely block off the joist spacing in case plumbing or electrical needs to be run.. no drillinng or notching required
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Old 09-29-2012, 05:31 PM   #5
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What is this crossbracing on my floor joists?


Only if a 1x4 or ceiling ties them together underneath.

Apples to apples, the solid blocking is 66% stiffer than x-bracing, add the 1x4 to the bottom= 167% less deflection; http://www.ewpa.com/Archive/2004/jun/Paper_278.pdf

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