Looking for a good source of anchor bolts to be used on LM470 tower. Needing 6 bolts about 1" by 27" with J bend or angled. Spec seems to call for ANSI F155 4 grade 55 bolts. Anyone have spares or kn
Glen call these guys they will make whatever you need... http://www.atlanticboltinc.com/ when i needed bolts for my TX472 they were cheaper than anywhere else... Dan N8DCJ __________________________
Glen: The alloy call out is actually ASTM F1554 Gr 55. These are carbon steel anchor rods (newer terminology) with 55,000 psi yield strength. There is no need and it is not recommended by American Co
You also can try any of the local steel suppliers as they make them up all the time for their customers. I couldn't locate the one on my 555 and had a local steel shop make three up in exchange of a
If the concrete is 7 -8 feet deep, why is the bolt only about 2 feet long? I always wondered about that, and yes, it's true, I had a very hard time with Statics in college. Rick K2xt ________________
Does it not require the cage built specifically for the LM470? John K7WP _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTa
Again, remember, I had a hard time with Statics in college so go easy on me, but I always thought it was necessary to have a J to keep the rod from turning. But I guess even a tiny, very tiny, amoun
Presumably there's rebar in that concrete. The bolt is there to attach the tower to the concrete, not to hold the concrete together. If you had some magic epoxy that you could glue the base to the co
the friction between the concrete and the bolt is MORE than enough to resist the nut torque. This isn't a connecting rod bolt where you torque it down to preload the tension in the bolt so it never g
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 acco
Steve: Yes you are correct wrt the double nut. I also callout for the threads to be spoiled below the bottom of the lower nut. Belt and suspender philosophy. Foundations are relatively less expensive
Rick: Not really the crushing starts to be a factor when you approach a right angle (90deg bend). Regards Lonberg Design Group, Ltd. H. S. Lonberg, P.E.,S.E. / KR7X Principal Again, remember, I had a
FWIW, on the bottom end of each of the anchor rods from US Tower for my TX-472, there is a 2"x2"x5/8" plate welded to a nut. The nut is threaded onto and welded to the rod. See the last photo in this
I rebuilt a Tri-Ex LM470 in 1999, and got the majority of my hardware (galvanized bolts, pulleys, sheaves, hardened bolts, etc.) from RH Fastener Supply Co. They are in Kansas City, MO. http://www.rh
I have a set of 2 inch that were meant for a Street Overpass tower sign and on the bottom is a 4 inch by 2 inch round treaded disc. Does the same thing the nut that us tower welds on the end. On a to
Glen, I have had several TriEX LM-470 towers and none of them used "J" bolt anchors. TriEX system uses Steel 'Flags' (with mounting holes ) welded to Large Diameter Re-Bar cage that is imbedded in th
So how are you guys using anchor bolts on an LM470? Has someone designed an LM470 mounting plate that fits on anchor bolts? Normally the LM470 mounts on a special base section that is buried in concr
I see no problem with your system either other than cost for all-thread in the correct size. Dies in larger sizes are somewhat expensive and harder to come by. I had the good fortune to had worked in
Dave, That's what I was thinking as well. I have seen people cut off and weld the three LM-470 bolt Ears to a US-Towers "T-Base" which works, but I do not understand what this is about. Mike, K6BR So
That the problem with any of the Hygain or TriEx or as they are now made by Tashjian Towers they are welded rebar cages with 1/4 steel plate for ears that are also welded to the cage. Yes there is a