Bolt brand and style selection- Tables ahead
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I have been thinking about putting up some routes and have found there to be a ton of information which, at times, is contradictory regarding bolt selection. As a generalization the environments I am most curious about are dry desert limestone and granite. I know bolting can be a touchy subject and opinions seem to be very strong. I am really looking for technical information and opinions regarding the best hardware for the job here. Rest assured that I will be speaking with the local route developers to ensure that any routes would be consistent with local standards and ethics and that I will be making every effort to not step on toes.I additionally want to get their opinions on the best hardware for the local rock. |
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Sleeve bolts (5-piece) are better than wedge bolts in soft rock because you have much more surface area. The general consensus is that Petzl, Hilti, and Powers(which is the same as rawl) bolts are good. I've heard a lot of bad about redhead bolts and not much good, so I'll leave that up to you to determine for yourself. |
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The redesigned Powers 3/8 bolts are total garbage, the shaft is now close to 1/4 with a thicker sleeve compared to the old design. If you use Powers bolts the only choice is 1/2". In fact you should use 1/2" stainless steel or if you want the absolute best bolt, use glue in bolts. |
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The Access Fund has the best current information on bolts in my opinion. This information will not only give you an idea of what bolt to place now in your type of rock, but it will also give you information on how to remove bolts in the future. Read every single article on this page if you're going to develop rock climbs: |
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Mtn Proj, the best place to get advice from an 18 year old. |
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Taylor Spiegelberg wrote: The Access Fund has the best current information on bolts in my opinion. This information will not only give you an idea of what bolt to place now in your type of rock, but it will also give you information on how to remove bolts in the future. Read every single article on this page if you're going to develop rock climbs: The Access fund information was very helpful, thank you. It is well organized as I would expect. I am wondering if anyone can opine upon the strengths of the 5 piece vs the wedge style. The AF website states multiple times that the 5 piece is preferable due to its superior strength. Based upon the numbers above, though, it would appear that the Redhead actually outperform the 5 piece in every category. Is the recommendation due to manufacturing quality? Should the numbers from Redhead not be trusted? I will absolutely defer to the advice of the Access Fund and those with more experience than me and place what is recommended. But the numbers, from what I have seen, do not necessarily agree with the statement that the 5 piece is stronger than the wedge so I am curious where this is coming from. If the Access Fund and the ASCA say that 5 piece is stronger then I trust them, but I am just wondering why the numbers I have found above contradict that statement. |
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K-tanz, redheads are nick named dead heads for a reason. Really it's quality control, they do a shit job on testing the redheads and they break sometimes. If you get a good one it'll work, but it's not what you should be using when someone is trusting it for a whipper. 5 piece bolts or glue-ins preferably, don't mix metals between your hangar and bolt, find someone local to show you the way. |
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power wedges loosened up on me. they changed the cone design and it has too sharp and angle. . the collar can pop off. probably works well on concrete but crap for stone... red head has a wedge bolts that has a shallower angle on the cone and they are rated for stone and concrete. |
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K-tanz, the numbers above are for 3/8", the AF recommends 1/2" Power Bolts which are far stronger than any 3/8" wedge type anchor. |
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Redhead has poor machining, don't use them. |
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K-Tanz wrote: The problem is that you are comparing the new style 5-piece bolts, not the old style 5-piece bolts which is what all of the climbing literature is talking about. A year or two ago, powers changed the design of the 5-piece bolt (Rawl's old name) from a powerbolt to the powerbolt+ and discontinued the old powerbolt. The old powerbolt had a 5/16" grade 5 bolt through the sleeve, the new powerbolt+ has a 1/4" grade 8 bolt through a thicker walled sleeve. The old 3/8" powerbolt had a shear and pullout strength of something like 5800 lbs, so much higher than either the new powerbolt+ or any 3/8" wedge in existance. The problem with Redheads is that they have terrible quality control. Yes, the numbers listed are plenty high for climbing use, but the problem is that you may get a bolt that meets those numbers or you may not. Another note is that Rawl used to make much better wedge bolts than Powers does now. The old Rawl wedge bolts had rolled threads and a much better cones. Now the Powers brand wedge bolts have machined threads, a steeper cone, and bod tooling marks around the cone which makes it harder for the sleeve to expand, so I would stay away from Powers wedges at this point. If you really want to use a wedge bolt go with either a Hilti KB3 or KB-TZ, those are by far the best wedge bolts on the market for both strength and quality. If you want to go with the best bolts available, go for glue ins (either wave or titt bolts are my preference). If you want to spend a whole bunch of money, go with 1/2" stainless powerbolts. I would also recommend that even in the desert, it is much better to go with stainless. |
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OP: Just wanted to suggest that you consider using glue-in bolts. They have one big disadvantage compared to expansion bolts (you can't go ground up) but after they're placed, they have many advantages. Better strength, corrosion resistance, they don't loosen up, don't cut your biners, easier to clip, can lower without leaving a biner, etc. |
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It always suprises me that the GREATEST, yes GREATEST industrial nation on earth (bomb the Chinese back to the stone-age if they overtake) can´t actually install some bolts in a piece of rock and measure the real strength they achieve |
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Thanks for all the replies, definitely some good info and opinions. Seems other than the stainless sleeves that glue-ins are a good option. I thought they would be much more cost prohibitive, but with the stainless Wave Bolt only being 6 bucks, glue-ins seem like the favorable choice for limestone and softer stone especially. |
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First off, what rock type are you bolting in? How's the quality? |
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I used 3 boxes of hilti stud bolts. loved em. had good luck with red head WW-3830 for lead bolting. made in USA. Don't know where all the hate is coming from?? Have not purchased them in perhaps 4 years so maybe something changed? Like the fixe 10mm glue ins. have not used the wave bolts. I get that they are super strong but I do not like how little actual meat they have for long term wear and tear. |
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Jim Titt wrote: It always suprises me that the GREATEST, yes GREATEST industrial nation on earth (bomb the Chinese back to the stone-age if they overtake) can´t actually install some bolts in a piece of rock and measure the real strength they achieveThe bolt makers give no shits for people bolting in rock all of their tables are for sheit concrete. Given liability concerns the best we get is "don't ever use this to keep human's safe". What incentive does a domestic climbing gear company like Metolius or BD have to test bolts at a local crag (where the stone would be the same)? They sell cams, not bolts. |
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Who said anything about climbing gear companies? |
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Jim Titt wrote: It always suprises me that the GREATEST, yes GREATEST industrial nation on earth (bomb the Chinese back to the stone-age if they overtake) can´t actually install some bolts in a piece of rock and measure the real strength they achieve Send me a calibrated load cell and I'd do some proper tests. I've got stainless bolts from almost every major manufacturer (Hilti, Redhead, Dewalt/Powers, Fixe, Climbtech, Bolt-Products). I axially pull 3 bolts from every box of mechanical bolts I purchase in the rock they will be installed into. I don't have access to a proper load cell so instead I use which ever wire gate is on sale at REI as a control. If the biner breaks before the bolt I use the box. If the bolt fails, more tests are done in different rock if tested in one of the weaker types common to my location. If a bolt fails in granite then the box goes in the scrap bucket. It would be great to record real numbers, but I'm working a budget (damn student loans!) Oh, and I've only had to toss boxes of ss304 Power-studs, and people swear by those. That being said the Power-stud SD4 and SD6 have been reliable so far. Stainless bolts made by ITW Redhead (WW-3836) are bomber in medium to hard stone, never had a test bolt break. They pull stronger than the old style Metolius hangers I use in the tests, though they are a poor choice in soft rock (like all wedge type anchors). I still prefer Hilti KB-TZ's for wedge anchors, when I can afford them that is. |
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Jim Titt wrote: Who said anything about climbing gear companies? The bolt companies have zero interest in testing in solid stone and probably don't want climbers even using their product. We have a gigantic industry of commercial construction that uses these things in concrete, nobody but climbers uses them in stone (for all practical purposes) and climbers make up probably less than 1% of sales.It would have to be done by a motivated individual that knew how to test them. |
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King Tut wrote: Exactly, either an individual or a climbing organisation. The manufacturers tables are often of limited value (of none at all) because they often extrapolate the strengths from concrete theory and their method of testing gives vastly different results than we obtain, a bolt which they can test to 28kN may only give 9kN used with a normal bolt hanger. One major problem is often climbers don´t actually want to know. I´ve offered the use of testers to people and the reluctance to use them is obvious, the activists really don´t want to see that all their work on their beloved cliff was actually substandard. Back in 2006 there was a long and heated discussion on another forum in Europe regarding the bolts in the area local to my brother, the tester which he has lay gathering dust until last year when the person running the bolt fund changed and they started testing with the result ALL of the bolts are being replaced. This isn´t what many people want to hear so they avoid the problem altogether by never testing anything. |