Adhesive Concrete Anchors into Construction Joint
Adhesive Concrete Anchors into Construction Joint
(OP)
Is there any issues to consider should an adhesive anchor wind up being located in a construction joint between a wall and a floor?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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Adhesive Concrete Anchors into Construction Joint
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RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
one other consideration...liability.
If you specify the anchor outside the manufacturer's tested parameters, YOU take on the responsibility for the performance. If the contractor installs it outside your specification and the manufacturer's recommendations HE takes on the responsibility for performance.
Better HE than YOU! Write a letter and reject the application...then let the contractor sort out a revision with the manufacturer. You still get the opportunity to decide yes or no, but it somewhat removes you from the liability stream...at the least it puts you in a boat on the stream, not swimming against the current!
RE: Adhesive Concrete Anchors into Construction Joint
The expansion will be locally prevented by the bolt causing spalling, and when the slab contracts, the pullout will be negated and any shear capacity greatly reduced.
Relocate the anchor.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
Column is roughly 35' tall with a second floor at 20'. It looked like there was possibly a cold joint in the column just above the second floor but I would have thought the column was poured full height before the second floor was poured?
Excuse the extreme ignorance here...I do not work in concrete much other than foundations.
RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
In the normal course of casting concrete structures, there would be a construction joint in the column both above and below the floor. In other words, the part of the column within the floor depth would be cast with the floor.
RE: Adhesive Concrete Anchors into Construction Joint
MiketheEngineer...I absolutely promise you I will call Hilti tomorrow. I swear.
RE: Adhesive Concrete Anchors into Construction Joint
A cold joint, not intended? In a column, it should be treated the same as a construction joint, i.e. the surface clean and rough before casting above, but the problem with that in construction is that the forms have to be removed. Cold joints in columns should be avoided. Why do you think you have a cold joint?
RE: Adhesive Concrete Anchors into Construction Joint
Hokie you say "In the normal course of casting concrete structures, there would be a construction joint in the column both above and below the floor"
How far above and below should I expect to see the "construction joint"?
Would this joint be a clean joint or just a cold joint?
RE: Adhesive Concrete Anchors into Construction Joint
Clean or cold? The construction joint should be both.
Yes, what you thought was a cold joint in the column may well be where the formwork butted.
RE: Adhesive Concrete Anchors into Construction Joint
I need to hit the books for concrete building construction.
I have never had an opportunity to work with concrete buildings in the firms I have worked for/with or in my own work.
RE: Adhesive Concrete Anchors into Construction Joint
RE: Adhesive Concrete Anchors into Construction Joint
You work for CRSI?
RE: Adhesive Concrete Anchors into Construction Joint
Ron
RE: Adhesive Concrete Anchors into Construction Joint
When looking at concrete anchors, ACI 355 (Anchorage to Concrete) and the Concrete Anchor Manufacturers Association (CAMA) also have good information.
John Turner CSP PE
CRSI Greater Southwestern Regional Manager
RE: Adhesive Concrete Anchors into Construction Joint
Thanks. Pleased to have you as a resource for the forums. Your technical input is valued and you have shown that it extends way beyond your CRSI involvement.
Ron
RE: Adhesive Concrete Anchors into Construction Joint
Ref RILEM - "International Symposium on Connections between Steel and Concrete" - U of Stuttgart
RE: Adhesive Concrete Anchors into Construction Joint