Thanks guys for all the good input. I failed to mention that I have a "T" base with the proper "ears" on it for the LM470. It is made of 3/4 steel that is to be bolted to the concrete pad. More resea
Fastenal, www.fastenal.com is a good source for anchor bolts. You can either go to your local store or order online. Online has the stock while the stores may be hit and miss. As for a homebrew basep
IMHO buying a new factory base is the right thing to do. Following the manufacture's specs may cost more, but will give you peace of mind when the big winds blow, the codes enforcement and insurance
"My thoughts!": The bolt head, J, flag, or plate only needs to be big enough to prevent the anchor from turning, pulling out, or over stressing that small area of concrete. I think J-bolts are by far
It is not necessary to coat the anchor bolts with anything. When the steel is encased in concrete it cuts of the supply of Oxygen so it doesn't rust. If steel rusted inside concrete you would have to
I'm talking about the threaded bolt above the concrete and exposed to the elements. I've seen the threads almost gone from bolts that protrude a few inches above the concrete in an area where water c
It is not necessary to coat the anchor bolts with anything. When the steel is encased in concrete it cuts of the supply of Oxygen so it doesn't rust. If steel rusted inside concrete you would have to
In theory and if you followed the tower mfg. directions, the top of the concrete pad will be crowned and water will not be trapped around the protruding anchor bolts. Before I poured concrete, I pain
As a philosophical thing, I tend to prefer installation schemes where there's no annual/periodic maintenance required. That's one of the advantages of, for instance, exothermic welding (Cad-Weld One-
Hello All, I have an Tri-Ex LM470 and as I read this thread I can't help thinking that this is NOT an LM470 tower!!! The base is does NOT use anchor bolts in concrete! Please see the attached LM470 d
Agreed Ted...same here at K7WP...please be careful all! John _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contestin
I have 2 LM-470D's and had a 3rd but sold it. There was a company that made bases for these other than Tri-ex /Tash. that was as described using J bolts allowing leveling. It had a big plate with fla
Some of us who upgrade to different towers don't want to start over by digging a new hole, and using TriEx's huge base fixture, and pouring more concrete when there is a perfectly good concrete base
A search of the archives will reveal a post where I talk about tower anchor specs... Also, a pour we did at work where we did the anchors a little different. A list member used this idea on his monst
Institution (ACI) 318 design specifications for reinforced concrete to use hooked (J) anchor rods in tension situations without reducing the tension capacity significantly for hooked anchors on accou
I'm not sure why you would need to tighten the nuts that much. Once they're cast in concrete, nothing is going anywhere. It's not like the lower nut is going to magically fall off the end of the bolt
I'm not sure why you would need to tighten the nuts that much. Once they're cast in concrete, nothing is going anywhere. It's not like the lower nut is going to magically fall off the end of the bolt
Dave, I have designed a hinged base for my LM-470 using finite element stress analysis techniques. The design in present form uses (6) 1-1/8" x 36" high strength anchor bolts and facilitates service