Gr8 bolt expoxied to CMU wall
Gr8 bolt expoxied to CMU wall
(OP)
I've never seen this before and I'm not sure what to say. I'm assuming the Gr8 bolts are inserted into hollow cores and I doubt if sleeve inserts were used. I think the Contractor drilled a hole; squirted epoxy; and stuck the bolt in the hole. What does everyone else think? What you're looking at is a WF8 header spanning 18' between two block walls. The header supports a crane runway rated for 1T. The structure weighs more than the crane capacity.










RE: Gr8 bolt expoxied to CMU wall
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/
RE: Gr8 bolt expoxied to CMU wall
RE: Gr8 bolt expoxied to CMU wall
Personally, I'd probably be advocating that the flange and block be drilled in place with proper anchors installed. This would be quick and not very expensive.
Given that a grade 8 bolt was used instead of a proper adhesive anchor, I'd be reluctant to assume that the install was performed with any sort of care or attention to detail. An improperly installed adhesive anchor can have little or no actual strength.
RE: Gr8 bolt expoxied to CMU wall
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/
RE: Gr8 bolt expoxied to CMU wall
RE: Gr8 bolt expoxied to CMU wall
RE: Gr8 bolt expoxied to CMU wall
I agree about performing a load test -- although an Appendix D calc may give you an estimate of the weight you'll be looking at.
My guess agrees with most of the posters above: not much.
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The name is a long story -- just call me Lo.
RE: Gr8 bolt expoxied to CMU wall
RE: Gr8 bolt expoxied to CMU wall
I have drilled and placed many types of anchors (horizontal and vertical) most of which required some sort of pull test to verify which you cannot perform with this type of installation. Anchor manufactures are very specific with the installations as they have already tested them.
Seems too risky to me, I would not sign off on it, unless you are absolutely sure of the installation and witnessed it. Especially if this is a overhead crane runway, not sure I would walk under it.
RE: Gr8 bolt expoxied to CMU wall