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  1. 10th July 2023, 12:07 PM #1
    SDE
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    Question Mounting bearer on concrete stumps with rusted out rods

    Possibly a (very) rookie question… I am renovating an existing deck which is on 3 rows of 4 concrete stumps. The bearer on the weather side (furthest from the house) has deteriorated so I want to replace it before proceeding with joist replacements. The rods on the top of those four stumps are corroded out to the point of being useless.

    Is there a safe and reliable way to mount the new bearer on top of those stumps without replacing them totally?

    For information’s sake, the top of the stumps are about 800mm above the ground. Not sure if that’s relevant

    I’ve searched this forum but can’t find a solid idea. Thanks in advance, Scott
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  3. 10th July 2023, 01:15 PM #2
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    rwbuild
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    Use chemset Just a moment... and appropriate length and diameter galvanized bolt, drill the hole beside the rusted one and prior to final fit of the new bearer epoxy the top of the stump so water doesn't create concrete cancer around the old bolt/rod
    The person who never made a mistake never made anything

    Cheers
    Ray
  4. 10th July 2023, 02:08 PM #3
    SDE
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    Quote Originally Posted by rwbuild View Post
    Use chemset Just a moment... and appropriate length and diameter galvanized bolt, drill the hole beside the rusted one and prior to final fit of the new bearer epoxy the top of the stump so water doesn't create concrete cancer around the old bolt/rod
    Thank you for that suggestion. I had been considering that approach but I read the occasional negative post about drilling holes in concrete stumps which left me a bit unsure.

    Cheers
  5. 10th July 2023, 07:12 PM #4
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    rwbuild
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    Use a brand new SDS masonry bit either 3 or 4 cut bit in an SDS drill, just make sure you remove all dust from the finished hole before inserting the chemset and bolt.
    It is advisable to use 2 clamps and 4 pieces of timber on opposing faces to lessen the possibility of cracking the top of the pier, depends how good the concrete is (porous or very dense)
    The person who never made a mistake never made anything

    Cheers
    Ray
  6. 10th July 2023, 07:23 PM #5
    SDE
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    Another great tip - thank you!
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