Post-installed Concrete Anchor Bolts and Misplaced Embeds
Post-installed Concrete Anchor Bolts and Misplaced Embeds
(OP)
Some of you may find this to be a dumb question, but I will go ahead and ask...
I have designed embeds for components and cladding anchorage on a large project in a high wind pressure, hurricane-prone region. On projects this large, I find that there are always some locations at which embeds are misplaced or left out of the construction entirely. See the attached sketch for a generic detail of my condition.
At misplaced embeds leading to the need for a post-installed anchor bolt fix, should I be concerned about the spacing between the post-installed anchors and the cast-in-place (embed) anchors? Will the embed anchors create a breakout surface within the concrete substrate that should be considered? Any specific resources that I should be referencing for this type of issue?
Thanks so much for any advice/suggestions.
I have designed embeds for components and cladding anchorage on a large project in a high wind pressure, hurricane-prone region. On projects this large, I find that there are always some locations at which embeds are misplaced or left out of the construction entirely. See the attached sketch for a generic detail of my condition.
At misplaced embeds leading to the need for a post-installed anchor bolt fix, should I be concerned about the spacing between the post-installed anchors and the cast-in-place (embed) anchors? Will the embed anchors create a breakout surface within the concrete substrate that should be considered? Any specific resources that I should be referencing for this type of issue?
Thanks so much for any advice/suggestions.






RE: Post-installed Concrete Anchor Bolts and Misplaced Embeds
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The diameter of the post-installed should be the drilled hole size, and the emdedments of both should be checked relative to each other (for concrete breakout and such)
RE: Post-installed Concrete Anchor Bolts and Misplaced Embeds
RE: Post-installed Concrete Anchor Bolts and Misplaced Embeds
RE: Post-installed Concrete Anchor Bolts and Misplaced Embeds
I am very familiar with the ESR reports, use them everyday :)
ztengguy - my opinion/thoughts align pretty much identically with yours, just wanted to see if there were any varying ideas out there.
RE: Post-installed Concrete Anchor Bolts and Misplaced Embeds
So, your goal should be keeping that 45 degree cone from the tip of the embedded anchor bolt hole to the surface of the concrete away from unused anchor bolts, and most certainly away from used anchor bolts carrying tension!
If the cone intersects an existing (unused, no-added-stress-to-the-concrete!) anchor bolt, then you need to reduce the effectiveness of the "cone" as if it were hitting the edge of the slab or side of a curb. (To be conservative.)
To assume that the interaction "cone" "flows around" or "flows through" an unused anchor bolt as if it were solid untampered, undrilled concrete would require actual pull-out tests rather than assumptions.
RE: Post-installed Concrete Anchor Bolts and Misplaced Embeds