standing rigging size calculator

If I were to replace with stainless I'd be looking at a total of 310 feet of 1/4" SS for the main and 120 of 3/16"SS for the mizzen The picture below shows the most common rigging terminals used at Jimmy Green Marine.From left to right, Talurit Thimble Eye, Fixed Eye, Shackle Toggle, Stud, Stemball (Elephants foot), Toggle Fork, the toggle fork on the bottom of a rigging screw, Fixed Fork, Hamma Spoon, and Flat Head. I would suggest using larger than 1/4" dyneema. (If you prefer more choices, please see our Running Rigging Builder.) Their sizing post is Sizing for Creep. The simplest and quickest way is to use a rig-tension meter, such as the Loos gauge. If you can get the cap, Colligo, Colligo, Colligo. Stainless steel isnot a malleable metal, so the pressure applied by the roller dies is exceptionally high, creating a solid bar of material. Since you're doing lashings, an inch either way won't matter: what's more important is cutting all your lowers the same length so the deadeyes all line up and look symmetrical. We have chosen a Class40, a sister-ship of the boat with which I competed in the Global Ocean Race 2011/2012. If we observe the mast we will also notice that this setting will mean that when tightening runners and checkstay there isnt much change in mast shape. And PLEASE do not buy a used boat without a professional rig inspection! The lazy rigger screws the turnbuckle on deck a few turns so that he has only to hook the vertical shroud, the V1. But I mean, why dont hey have prices listed on their site?! Our calculator is easy and simple to use. It is indeed a complicated process in using a braided line for standing rigging. The picture below reveals the variation in thickness and head angle to the swage. Tightening the left runner-checkstay pair seemed more or less ok. Starboard we clearly had a problem, the mast would bend to windward at the height of the second set of spreaders. Also Marlow describes them all and includes comparison charts. It was time to move on runners and checkstays to decide if something needed changing. The standard seems to be 2.5 to 3.0. Having to remember this T-bone day and night in every situation is not the best of proposition. Runners and checkstays are not structural, therefore are not to be considered part of the standing rigging per se, the mast does not need them to stay up. When measuring rigging, the convention is to measure from pin center to pin center or from bearing point to bearing point. Find a flat surface large enough that you can fully stretch your rigging out for measurement. Ive taken the stainless breaking limits from the Marlow table off Jimmy Green (see above). With a masthead rigged boat, the backstay can be used to increase forestay tension in high winds. This is because upwind mast is fully loaded at just 15-16 knots after which you need to reduce sail. standing rigging size calculator. I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. T-terminals or shroud terminals often provide the most difficult decision.There are t-terminals on the market such as the Sta-lok and OS/BSI varieties which are sometimes referred to as universal.This means that they aredesigned to fit a variety of different backing plates, and they may well prove to be a useful resource if your existing terminals can't be replicated.However,it is bestto match the t-terminal to the mast backing plate from the same manufacturer.The thickness and width of the head,as well as the angle of the load bearing 'shoulders', are all critical factors in selecting the correct version. All standing rigging is manufactured right here in our rigging shop -- the way it's been since 1984. Maybe the 10M is not so over-rigged as it appears. The wind was not much but enough to load the mainsail close-hauled and verify that the mast remained straight. Your email address will not be published. This turnbuckle features calibration, one extra-long stud and a fold-out arm to facilitate easy adjustments. While I would love to buy Marlow as a British company, they are a lot more expensive. That is because a Dyneema line the same strength as the Stainless Steel it replaces would be too stretchy to work. Cruising boat rigs can have up to three pairs of spreaders, depending on a number of factors, including the boat's size and type. Factors you must consider include: Type of hitch/method of rigging. Plus there will be more spare strength if there is UV or Chafe damage. There seems to be a lack of information on the web about the sizing for standing rigging. The backstay is both an element of the standing rigging but can also be tuned. Adjusting the rigging of a sailboat is less complicated than you imagine. Please do. For an average 40-foot boat, Cockerill estimates about $100 per foot to re-rig with wire rigging ($4,000), as well as the round-trip cost to haul and launch the boat and unstep and step the rig (an additional $2,500 or so). The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. Sort by: Taking 70% of the lower shroud capacity gives a safety factor of 3.4. There are additional developments of these three concepts: T-terminals areperhaps the trickiest identification recognition issue that you will face and it is also extremely important to get it right, so that your new terminals seat properly in their appropriate mast slot.The fittings may look similar, but if they are not specified correctly, theymay not fit the slot properly.Even though it may not immediately be apparent, incorrect seating can lead tostainless steel fatiguewhich, in turn, may cause premature failure.If your existing fittings don't seem to matchthe replacements that are available, it will be prudent to fit new, matching plates on the mast. The goal is to give the mast a beautiful shape that does not have strange kinks in its curvature and especially any inversions etc. On a Mini 650, to avoid too many lines, and with a boom that weighs a few kilos, nothing replaces the topping lift. Check your spreaders, chainplates and turnbuckles for cracking, fatigue, missing cotter pins/rings, etc. From the Rigger: We are so glad you asked! That said, on a nine-tenths rig it is unlikely that you could break the mast tip under spinnaker just because you did not set the runner. We had no doubts having already simulated the effort with checkstays. We had created a perfectly straight mast track, an adequate rake and a pre-bend. It provides some tables of the most common suppliers of slings and shackles, but the user can add its own tables. In the Toss method 25% load was used for each lower shroud to match his example. Therefore, except in exceptional cases, starting from this assumption is more than reasonable. https://www.ebay.ca/itm/5-13mm-HampiKl3MW1P7_hTkTw. for a mid 20 ft boat, the same change in riggin saved as little as 50 lbs. Asymmetric Spinnaker Sheet - Boat length x 2.5 to 3. Tensioning the backstay, the central part of the mast advances forward creating a slight C shape of the mast seen from the side. In our case it was evident that the port turnbuckle had many more turns than the starboard side, compared to the thread of the V1 above. Good question. The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. With the boat in the water and not wanting to take any risk, we didnt want to get to unhook any turnbuckle. This will be true for all three of your reef points. The list of materials and design stresses are those that ISO 12215-5 standard says that can be used. Add that amount for each splice (it won't amount to even 36 feet in either case), plus the distance around the thimble. Balancing the risks and benefits, at the end of the day, on my boat I decided to eliminate the T-bone and seek for a medium setting. With the D2s completeley loose, the D1s were obviously too soft too. Their role is not simply to contain the main when dowsing it. For example, when setting the runners, it was noticeable that the working points of the control lines had moved by about 20cm. Rust and discoloration can indicate the location of a crack or crystallization of the metal. With proper measurements (wire diameter, pin sizes, wire lengths), we can give you a very accurate price for the standing rigging itself, but there are often unforeseen complications during the job (bad spreaders, corroded mast bases, hardware that is stripped on the mast, frozen pins, chainplates that are failing, etc. When buying new running rigging (i.e. iPhone. On boats with swept back spreaders, runners and checkstays are not structural. By giving the D1s a few symmetrical left-right turns we were able to straighten the lower part of the mast. Others, such as Mr. E.Sponberg, make other distribution of forces. Thethickness of the chain plate - check that the new fork is wide enough to fit over the chain plate, but not so wide as to cause a pinpoint load or allow too much lateral movement. T-terminal is a generic term for all the different forms of shroud attachment favoured by mast manufacturers, both current and historic - T, T-Bar, Flathead, T-Ball, Stemball, also known as Elephants Foot, Stemball with Cup, Spoon and Shroud terminalare all variations on this theme. 1x19 Wire Rigging Stainless Steel 1x19 Wire Rope Rigging is the most popular solution for standing rigging on cruising yachts. It also has a module for calculating continuous beams and large facilities for manage the various materials used in the construction of modern boats. In fact, if the D2s had been too soft, when tightening the checkstay the mast would bend to windward. So we measured the total length of the left and starboard turnbuckle system for both the vertical shrouds (V1) and the low diagonals (D1). Although the mast is made of carbon rather than aluminium, the rig is the same as that of a Mini 650 Pogo2 from Structures shipyard. Select your wire construction KOS 1x19 - this is the standard wire for standing rigging on Cruising Yachts Petersen Compact Strand - for higher strength performance KOS flexible 7x19 - for applications where the wire will be required to turn around sheaves. only hand tools are required for installation, can also be completely disassembled and reused (some models require inner cone replacement) providing great longevity, can be manufactured to very precise tolerances, the waste material can be recycled to create further parts. Continuous rigging is made up of single pieces of wire that run from the top of the rig to the deck allowing the tuning to be done at deck level. If your end terminal is a threaded stud measure to the end of the stud; include the length of the threaded portion, note whether it is left or right handed, and the thread size. Condition of sling - passes all inspection criteria. I am not aware of any such cases among Class40s. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. Search by manufacturer's part # or brand. The distance between the halyard and the mast at the boom is your rake. One method of seeing this is to take a piece of Dynice Dux (SK75) and cutting it with a very sharp knife, you will get what looks like a single line made up of 12 cells, it holds together that well. But the disadvantages are cost (not just the line but also the thimbles) and windage (but we have a big boxy wheelhouse so are not exactly aerodynamic). The choices get more tricky as Liros dont make every size (no 7, 9 or 11mm). Things to look for include corrosion, pitting, cracks, and broken strands or meat hooks on the wire. In this article we will deal with the tuning of standing rigging of a typical sailboat. The strength, minimal elongation, excellent corrosion resistance and general performance of KOS 1x19 construction stainless steel wire are suitable for most sailing yachts. 10M OEM Rigging Wire Headstay Backstay Upper Shroud Lower Shroud Size 3/8" 3/8" 5/16" 9/32" So is the rigging over-sized on the 10M? Required fields are marked *. In addition to this it was clear that when the starboard runners and checkstay were tensioned, the mast deteriorated in shape. Global Solo Challenge Copyright 2022. As we go through the sizing calculations comparisons are difficult as they dont use the same version of Dyneema. Keith Anderson is a 40-year veteran of the crane and rigging industry. Of course what we have not been able to compare fully is the performance of Marlow vs Liros in heat treatment, pre-stretch and coatings. Many people believe that only heavily used rigging needs to be replaced, but the continuous flexing of loose wire that is not under load can take a serious toll as well. (contrasted with running rigging). Check the thread type (UNF or Metric) the thread size (standard or upsize) and, just to make sure, the thread direction. Hey all, I'm going to do my standing rigging myself with Dyneema using thimbles and dead eyes. We are confident that you will look forward to our emails. The righting curve is fairly straight line from 0 to 35 or so and the rate is actually decreasing so using the 716 lbs/degree will give a slightly high value at 30 degrees which is nicely conservative. So unless you had to do a short inshore event with light airs predicted changing the setting for each and especially longer races makes no sense. To calculate the load on a particular sling leg proceed as follows: Take the total weight of the load and divide this by the number of legs supporting the load. Finally, the role of the D2s in counteracting or favouring the bend between the first set of spreaders and the masthead. standing rigging size calculator Archives. Taking the upper and a single lower of 5/16" gives a safety factor of 3.1. If you cut heat stretched SK90 or 99, you will get 12 strands that fall apart. Taking into account boat length and sailing style, the attached chart suggests rope diameter and type for each piece of running rigging: Rope Diameter and Type. Gerr and Toss both note that the lowers get more load than that and when there is more than one each should be capable of handling the full load. For the moment I wanted to see the mast without no tension in the D2s. Discussion in 'Software' started by TANSL, Feb 11, 2016. What does all this mean? The rake depends on the relationship between the length of the forestay and the shrouds as a whole. There is nothing more expensive than a cheap boat! Not forgetting the compression loads from the stays too. After this introduction, lets move on to a practical case. The Gerr method seems to go a bit smaller but all of them are smaller than the OEM rigging on the 10M. To do this we tighten the runner with the checkstay lashing very short to start with. It is your responsibility to assure that the slings you use are appropriate for your application. I don't have a direct figure for RM30 but I do have IMS measurement data for the 10M and can extrapolate a pretty good approximation. This yields a shroud load of 6,000 pounds. Imagine bearing away, removing the genoa and hoisting a large spi. In the design of the Dyneema chaimplates I mentioned sizing them up, but of course the line is doubled so Ill use the same size for the chainplates as for the shroud/stay attached to them. In our search we have found three sites particularly helpful. On some boats a loop with T-bone is is used to shorten the checkstay lashing by a few centimetres. We also attached spinnaker halyards one to the left and one to starboard to an eyebolt. be exactly level with the same number of turns on the upper and lower par. We wont be re-rigging the main until after the 2021 season so have plenty of time to measure properly. Type in the parameters 2. Or maybe a lot of other boats are under-rigged? The checkstay, instead, was tied to the first pulley with a lashing so that it could be adjusted in length. So these are the sites Ive found most useful in working sizes for our boat. Stainless Steel Wire Rigging and Wire Rope, Guard Wires, Guardrails and Guardrail Webbing, Replacing your Standing Rigging - a step by step guide, Sta-Lok Rigging Terminal Fitting Instructions, Why choose Compacted Strand for your Standing Rigging, Stainless Steel Wire - Quality Control and Care, Stainless Steel Wire Break Load Comparison, LIROS 3 Strand Lashing, Lacing and Lanyards, LIROS Braided Lashing, Lacing and Lanyards, Running Rigging Rope Fibres and Construction Explained, Dyneema Rope - Cruising and Racing Comparison, Running Rigging - LIROS Recommended Line Diameters, Running Rigging Break Load Comparison Chart, Selecting the right type of block, plain, roller or ball bearing, Custom Build Instructions for Sheets, Halyards, Control Lines, Comparison and Review of Dyneema Soft Attach Low Friction Ring Products, Bending and Hoisting Methods for Sailing Flags, Courtesy Flags Identification, Labelling and Stowage, Glossary of Flag Terms and Parts of a Flag, Petersen Stainless - Upset Forging Information, Thimble Dimensions and Compatible Shackles, Guard Wires - Inspection and Replacement Guidance, Webbing Jackstays - Custom Build Instructions, Danbuoy Instructions - 3 piece Telescopic - Offshore, Man Overboard Equipment - World Sailing Compliance, Safety Marine Equipment List for UK Pleasure Vessels, Helly Hansen Mens Jacket and Pant Size Guide, Helly Hansen Womens Sailing Jacket and Pant Size Guide, Clearance 1kg Automatic ABC Dry Powder Fire Extinguisher, August Race eco-Shotz - Boat Cleaning Kit, Clearance A5 Polyform Heavy Duty Buoy Fender, Strap Toggle - also known as a Toggle Fork, development of the fixed fork - features a transverse bar withan articulating fork attached- for attachment to a mast plate with a hole drilled through it, also known as a mast tang, Shackle Toggle - development of the simple eye featuring a permanently attached D shackle- for attachment to a mast tang. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. NE ropes has STS-HSR. If it does not rotate, spray some WD40 but never twist the rod rigging. Its a popular model of Class40, a first generation Akilaria RC1, designed by Mark Lombard, from around 2006. Since we also stand to gain when you replace your rigging, let us say that many insurance companies will not insure sailboats with aged rigging. We are not experts but just trying to show our thinking processes. Forum posts represent the experience, opinion, and view of individual users. Taking the total capacity of the upper and lower shrouds compared to the shroud load calculated using the RM30 formula gives a safety factor of 4.2. The Loos tension gauges take the guesswork out of cable or rod tension adjustment. Is it maybe, just maybe possible that they have cornered the market on synthetic standing rigging through a, Location: Bas Caraquet, New Brunswick, Canada. Make sure your turnbuckle is centered between the studs for accurate measurement. Certainly distributing the tension between runner and checkstay greatly reduces the load of the standing rigging. Then we choose what percentage of the breaking strength of the Dyneema we want this to be. This means that when the main halyard is released, the boom falls onto the coach-roof. Can you break it down for me? From the Rigger: First, if your old rope served its purpose but needs replacing, we recommend duplicating it as closely as possible Read more, http://rigworks.com/maintaining-your-standing-rigging/, http://rigworks.com/wp-content/uploads/2016/03/Standing-Rigging-Care.pdf, http://rigworks.com/the-scoop-on-rig-inspections/. So in all fairness, I was trusting my eyes. We also set runners and checkstays just for safety. Hi Dave, Thanks for your very thorough synopsis of using Dyneema for standing rigging. Get regular rig inspections! For more information on rig inspections, visit our prior Ask the Rigger article at http://rigworks.com/the-scoop-on-rig-inspections/. When I run my training centre I used to say that they were not part of the standing rigging but that for good practice we would treat them as such. Once the wind increases and we take the first reef, the runner is no longer needed (especially upwind). rope than a cruiser. We took then tightened the forestay by the same two full turns on the turnbuckle. Website created by. In our case the mast bent too far forward and the forestay was particularly soft. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. To fix a mast like this, with multiple problems, you need to have a method to get to a satisfactory result. That is, it is no longer one of the elements of the standing rigging (albeit adjustable). I hear about these guys on every forum everywhere. With proper measurements (wire diameter, pin sizes, wire lengths), we can give you a very accurate price for the standing rigging itself, but there are often unforeseen complications during the job (bad spreaders, corroded mast bases, hardware that is stripped on the mast, frozen pins, chainplates that are failing, etc.). Those methods give a guide to sizing the wire for the 10M. The wire is inserted into the hollow terminal and pulled through a set of roller dies. I can do the reverse test and see if the opposite set causes bend to leeward. Question: My halyard is binding. Both operations improve upwind performance. So you cant simplify this by saying to keep the working load below a certain percentage of break strength. Calculate the length of bury. We highly recommend you hire a professional rigger if you are not familiar with this process. They are all full re-rigs from 119 wire with new rigging screws (please note all examples given are for supply only): The distance between the hole and the top of the fitting - check that the new fork fitting has enough depth to accommodate the chain plate without obstruction. Thus your list is not suitable and not providing the correct strength for design allowable limits of mast alloy grades. Our riggers can also tune your rig, either at the dock or under sail. Attachment to the Mast, the top terminals. This is not to say it was already set right, but we had zeroed the lateral tension errors. By measuring the total length of the turnbuckles and exposed thread, many things could be deduced. Maintain your standing rigging! This development has become more and more marked with boats with very wide spreaders and without backstay. Our running rigging calculator can instantly spec lines for more than 5,000 sailboats. Below are some rough guidelines to help you make an educated purchase. The terminations for wire vs. rod can be quite different and require a lot of customization. For a -inch turnbuckle and toggle, a minimum thickness of. I ran the numbers for the 10M by methods from three sources starting with David Gerr's book "The Nature of Boats." Then it made a bend to the right and then back to the left between the second set of spreaders to the masthead. Despite that, they do all agree that Dyneema needed to be sized for Stretch rather than for Strength. Label all wire segments indicating their position. However we had to make some assumption and one was that each pair of shrouds would be the same length. It does seem like some competition is popping up here and there for dux. The checkstay, on the other hand, usually points where the foresail forestay attachment is located. Reefing Line (reef 2) - Boom length x 3. Despite the absence of a backstay its not runners or checkstays that keep the mast up. Get the full sizing and inventory of: - the standing rigging - the running rigging - the mast section with weight and size - gravity center localization - and mast tuning report 4. Their role is to prevent the mast from bending to leeward between the first and second spreader levels, especially upwind. Some say 52 diameters, other prefer 72 diameters. For 6.5mm stainless steel the breaking strength is 3220kg. This App is a tool that facilitates the calculation of basic rigging, weights of different profiles, and centers of gravity of composite loads.

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