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How much force can 2×4 withstand?Įxample: A 10 foot long 2×4 carrying a uniform load of 40 pounds per foot (400 lbs total load) will have a maximum bending moment at the center of the span of 1000 ft-lbs. To be accurate - the 2×4 is the same strength regardless of how you orient it, just that it will be seeing a lower maximum bending stress if oriented on edge, when loaded as you described.
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If you’re willing to have a 4″ wide beam, why not create a double 2×6 beam, this will be 237% stronger!Jan 1, 2007Īround 1,000 pounds Is a 2×4 stronger on its side? However, I caution you that it may be a good idea to have someone design this beam properly so the job is done right. The single 2×6 is 68% stronger than the 4×4 for vertical loads as you describe. With a 20 pound dead load, max span for a 2×4 is 5 feet.
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Who is? Use 2×8’s or don’t bother building it, as it will sag. Rule of thumb is 2X4 will span 6′, 2X6 = 8′.
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