? Threaded Rod with Hardy Frame
? Threaded Rod with Hardy Frame
(OP)
I am a contractor located in Los Angeles,where my engineer calls for a threaded rod of 7/8" dia. placed into exiting concrete footing (24" deep) and then 6" embededment into a 12"x24"24" unpinning concrete pier with a 4"x4"x.25" washer plate attached to the end(in new pier). My question is, does the threaded rod that passes thru the existing conrete footing need to be epoxied or will the uplift force resistance by the threaded rod with the 4x4 washer on the end be enough?
7/8" Thd. Rod
____|__________________
| (e) footing |
| |
|<- Epoxy? |
____|_________________|
| | |
| | |
| _|_ |
| | |
| |
| |
| (n) unpinning |
| concrete |
|_____________________|
7/8" Thd. Rod
____|__________________
| (e) footing |
| |
|<- Epoxy? |
____|_________________|
| | |
| | |
| _|_ |
| | |
| |
| |
| (n) unpinning |
| concrete |
|_____________________|





RE: ? Threaded Rod with Hardy Frame
RE: ? Threaded Rod with Hardy Frame
RE: ? Threaded Rod with Hardy Frame
Being in Florida, I cannot help you with code requirements in California since I am not familiar with them. I would say that if your existing footing is in bad condition, I would recommend the epoxy to help hold everything together and act as a unit.
It's easy to say that when in doubt, go stronger. I know I have not given you a "yes" or a "no", but like I said above, we cannot do that here. Your engineer should be able to help you out with the requirements. These are only my opinions and things I would look at if it were up to me. Please consult your professional before taking any action or making a decision.
RE: ? Threaded Rod with Hardy Frame
RE: ? Threaded Rod with Hardy Frame
As far as the epoxy grout, it may or may not have been specified, but I would only use it as a positioning tool and not depend upon any strength between the side of the drill hole and the threads of the rod.
This can also get more complicated if there are a number of rods to be placed this way and the shear cones begin to overlap. The analysis for this is in Section 1923 of the UBC.
RE: ? Threaded Rod with Hardy Frame
you are exactly correct, in dicussions with my engineer the epoxy of the threaded rod does not appy, he specified it only for positioing purposes with placement. no strength derived for calucating moments.
thanks