Good anchor bolt for old concrete???


Old 04-09-15, 06:08 PM
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Question Good anchor bolt for old concrete???

Hi. My mom want's a handrail on her from patio/steps. They are 4'x8'x8" slabs of old, medium aggregate, concrete. If it was straight cement, expanding or anchoring masonry bits and bolts would work great. But it's not cement. They're marbley old concrete slabs that could easily break. Is their a better option for anchoring into old concrete?
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Old 04-09-15, 06:28 PM
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Welcome to the forums.

Those slabs can still be drilled and fastened to. I would recommend using lead shields and galvanized lag bolts.

Maybe you could post a picture of the area for us.
Old 04-09-15, 06:59 PM
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IF it were straight cement, it wouldn't be concrete concrete is aggregate ( fine & large ), water, & cement pay attn to pj ! he already gave you what all the rest will post !
Old 04-10-15, 09:37 AM
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If you're concerned about an expanding type anchor cracking the concrete you could consider epoxying the anchor bolts. It comes in caulking tubes and has a special tip that mixes the two parts before it comes out the tip. It's not cheap, but is affordable. Also, since the two parts of epoxy come together in the tip it's best to use up the whole tube once you start or buy extra tips as the resin will harden in the tip so it can't be reused.

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