LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
It looks like a deep 1-gang metal box wrapped in duct tape to me.
A little job from last week.
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LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
You do. They relied on the strength of the beam flanges resisting pull-through, when, as you said, they were supposed to couple the rods into one long length.
Agreed. I thought about that, too, but as for anchoring, the all-thread will hold the new post base, which will act as four big washers. The weak link now is probably the rusted original bolts.as for these pole base extensions, the only thing i'd have added, would have
been 4 nuts spun up a few inches above the rod couplings to lock the rods
to the new pour.... it's a clean install... you can't tell from the photos if
he sank the new cage rebar into the existing base with epoxy... extra credit
points if he did....
- Location
- Massachusetts
If you where ever to do the math on this installation IMO you would find a safety factor of many times. The strength of those J-bolts in relation to the load they can ever be subjected to is many times greater.
I have never seen a pole base bolt of this size snap, I have seen poles bent over and poles broken at the weld where the pole meets the flange but always the bolts remain.
I have never seen a pole base bolt of this size snap, I have seen poles bent over and poles broken at the weld where the pole meets the flange but always the bolts remain.
electricmanscott
Senior Member
- Location
- Boston, MA
Nice black socks with sneakers grampa. :grin:
Fulthrotl
~Autocorrect is My Worst Enema.~
- Occupation
- E
- Location
- Simi Valley, CA
Kansas City, wan't it?
- Location
- Simi Valley, CA
OK, sorry I have to be the bad guy. While I think that the fix you came up with shows a lot of inginuity, I couldn't accept it.
In the picture with the cage, it looks like the cage is sitting in the dirt below (maybe you were going to suspened it and just didn't show that pic). Remember 3" of clearace all around the steel and it cannot be touching the soil. Now the couplings and the all-thread will not give the pole any sturctural stability. Since you can't stack concrete (you just create a slip joint) you should have drilled into the old footing and then epoxied your cage into that.
In short basically what you have done is just poured a light pole base on top of the ground, with those four couplings holding it in place (weakest link).
Now that being said, that was coming from our engineer. We design here for 80 MPH winds. You may not have the same conditions where you are and it may be fine. Also since that is a structural element we would require it to be engineered, again, may not be required where you are.
And I am really, really not knocking the fix, just being an inspector.:roll:
In the picture with the cage, it looks like the cage is sitting in the dirt below (maybe you were going to suspened it and just didn't show that pic). Remember 3" of clearace all around the steel and it cannot be touching the soil. Now the couplings and the all-thread will not give the pole any sturctural stability. Since you can't stack concrete (you just create a slip joint) you should have drilled into the old footing and then epoxied your cage into that.
In short basically what you have done is just poured a light pole base on top of the ground, with those four couplings holding it in place (weakest link).
Now that being said, that was coming from our engineer. We design here for 80 MPH winds. You may not have the same conditions where you are and it may be fine. Also since that is a structural element we would require it to be engineered, again, may not be required where you are.
And I am really, really not knocking the fix, just being an inspector.:roll:
grich
Senior Member
- Location
- MP89.5, Mason City Subdivision
- Occupation
- Broadcast Engineer
Sure sounds like the Hyatt Regency. That happened just after I got married.
Texas A&M has made this disaster part of their curriculum:
http://ethics.tamu.edu/ethics/hyatt/hyatt1.htm
http://ethics.tamu.edu/ethics/hyatt/hyatt2.htm
what, as a diversion from their bonfire? (that was A&M right?)
mivey
Senior Member
ooooh. That's cold.
sorry buy, these accidents that are SO easily prevented, drive me nuts. Simple human error like this is unexcuseable. Not equipment failure, not a natural disaster, not something so complicated that no one could have seen it coming, but some idiot who has no business building something, being allowed to build something that kills a bunch of people.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
I wonder if somewhere on a concrete worker forum there are concrete workers complaining about hacks pouring their own concrete instead of using properly licensed concrete journeymen.
I wonder if somewhere on a concrete worker forum there are concrete workers complaining about hacks pouring their own concrete instead of using properly licensed concrete journeymen.
ha! good point.
Rewire
Senior Member
- Location
- Lake of the Ozarks
I wonder if somewhere on a concrete worker forum there are concrete workers complaining about hacks pouring their own concrete instead of using properly licensed concrete journeymen.
I wounder how hard the concrete code book is to read?
- Location
- Logan, Utah
HERE is a link to where you can purchase the American Concrete Institutes ACI 318 Building Code Requirements for Structural Concrete and Commentary. The book is 430 pages long.
Chris
- Location
- Simi Valley, CA
I wonder if somewhere on a concrete worker forum there are concrete workers complaining about hacks pouring their own concrete instead of using properly licensed concrete journeymen.
Now that's funny. Talking about those darn DIYers and wondering if the guy even has a license to do concrete work. Probably doesn't even have a wheelbarrow or flat bed truck. Dang utility bed door slammers.:grin:
I wonder if somewhere on a concrete worker forum there are concrete workers complaining about hacks pouring their own concrete instead of using properly licensed concrete journeymen.
Here ya go!
Dr. Concrete.
Concrete engineering.
THe bolts are fine. The rusty material at the bottom is from the old pole.
Well crap. The bottom of my cages always sit in the soil. Do you think it's possible for the rebar to rust out all the way up into the concrete?
I think I am going to have to agree with you. I thought that the 1" bolts would give as much bond to the concrete as epoxied rebar. When you explain it like that, I understand.
I don't think it's going anywhere even in 100MPH winds but next time I will anchor the rebar into the existing base. How deep would you suggest I drill?
Cow
Senior Member
- Location
- Eastern Oregon
- Occupation
- Electrician
We've always made it a point to make sure the cage is not touching soil. Typically we build the cages a foot shorter then the sonotube and then break up a few cinder blocks and throw the chunks down the hole to support it. Something else that would work well too are dobies, which I might use next time. They're dirt cheap.
http://www.allmetalssupply.com/dobies1.htm
I also agree with the other guys about drilling the base and epoxying the rebar. I'd probably go 6-8" just as a common sense guess?
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