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Im talking about piers for decks and additions. Some guys use rebar and some dont. Opinions? I dont think its necessary because it adds tensile strength…which is not needed. Its the compression thats whats key here. But I do think its a good idea to use it as cheap insurance. Thanks.
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Rebar not only adds tensile strength to concrete, it adds shear strength. If your pier cracks, with rebar it will still hold together and bear evenly, so rebar is indeed cheap insurance.
*Ditto MikeInsurance doesn't come any cheaperGabe Martel GSCProject Manager
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Ronbaby:
I agree with Mike and Gabe. Let me add the following. Its not only recommended, but required per ACI 318. This includes not only longitudinal reinforcement (minimum 1% to max 8% of gross area of x-section) but lateral ties for the shear strength as mentioned by Mike Mahan. Never assume purely vertical loading, particuarly in seismicly active zones. Its cheap insurance and you can pick up inexpensive #3 or #4 U ties at any fabricator for building the cage. Unless they are long or heavily loaded piers, they shouldn't require engineering.
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Im talking about piers for decks and additions. Some guys use rebar and some dont. Opinions? I dont think its necessary because it adds tensile strength...which is not needed. Its the compression thats whats key here. But I do think its a good idea to use it as cheap insurance. Thanks.