2/18/2024 0 Comments Guy wire preform color code![]() ![]() ![]() I recommend you have a turnbuckle there as it will allow you to fine tune your adjustments later on. You will have a loose end pointing at your guy anchor with the comealong doing the work. If increased tension does not plumbize the tower, then you should consider letting out on the other guys. If you can tighten that first guy and bring the tower into plumb there is a good chance you will have also tightened the other guys in the process. Once the guys are moderately taught check the tower for plumb, adjust the guy that needs to be tighter first and, if necessary, later on you can let out the far side guy(s). I say moderately so you don't pull the tower over or throw it out of plumb from the start. With the comealong and a Chicago grip (or another, second, guy grip applied several feet up the guy wire) moderately tension the guy wire. If you have an equalizer plate you can use an adjacent hole on the plate as an attachment point. Depending on the installation you use this will vary as you will need to try and avoid the actual guy wire's path as best you can. ![]() You need to pass somethingthrough that eye which will act as a place for you to attach a comealong. If you are using an AB Chance or similar anchor into the ground/concrete you have a closed eye that is your attachment point. ifyou have ten feet too much your math is one hell of a lot better than mine! I assume you are using a bolt cutters for cutting your EHS.they can be had cheap at flea markets.you have seen them they have the big long red handles and menacing black jaws. Since you are splicing the guys by insulating them this first one will give you a good feel for how close your arithmetic guesstimate is. Use your arithmetic measurement for how long the guy should be and then make the piece of guy wire closest to the ground on that first one 10 feet too long. Move up to the next set and repeat until finished. Going from 100# to 400# tension might be less than 6 turns of the TB, so there's not much problem with pulling the tower out of plumb. Actually, using this method you don't need much turnbuckle to adjust. Once you've got your intermediate tension and plumb, it doesn't take much travel in the turnbuckle to get to the final tension - maybe as little as 1 turn. If all the guy anchors are at the same level, you only have to measure one guy they should all be the same. Start with the bottom set of guys and an intermediate tension around 100 pounds, verify the plumb (or pull into plumb) using a long level (4-6 feet) and then adjust to the final tension. The TIA-222 tower spec allows a tolerance of 1 part in 400 for tower alignment that's 3 inches per 100 feet so your tower doesn't have to be perfectly plumb. ![]() According to their chart, It goes from 15% down to 12% within about 10 hours and then finally reaching 10% within 30 days (a guess since their graph doesn't extend out that far). What they recommend is that the Phillystran be initially tensioned to 15% of its ultimate breaking strength and then over time, it will 'relax' to the 10% desired tension. 1/4 inch EHS is 6650 and tension should be 665 pounds for towers where 1/4 is specified by Rohn.įor Phillystran, there is some new information from the factory and it looks like it doesn't stretch as much as it 'relaxes'. The primary failure mode for Rohn 25 is in compression of the legs, so it is important not to over tension the guys, resulting in greater compression of the tower legs. Therefore, 400 lb tension is appropriate for Rohn 25 tower. You lose a lot of wind load in this last type of installation.įor Rohn 25, 3/16 EHS is recommended, having a breaking strength of 4,000 lb. One rule of thumb is 8% if the guy is out at 100% of tower height, 10% ifat 80% of tower height (standard Rohn drawings) and up to 15% if the anchor point is at 65% of tower height. Rohn specifies that guys should be tensioned to 10% of the breaking strength of the guy size that is recommended for a particular tower. Thanks to MD Lowell, N1LO, for gathering this information. The following was grepped from the mailing list from various authors. ![]()
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