standing rigging size calculator

And word of warning jobs often get expensive because the customer decides, once the mast is down, to add furlers, masthead units, new sheets and halyards, etc. From the Rigger: Lets play Name that Stay Forestay (1 or HS) Read more, Question: Do you have guidelines for selecting halyards, sheets, etc. The terminations for wire vs. rod can be quite different and require a lot of customization. What does all this mean? My guess is 3/8". Then it made a bend to the right and then back to the left between the second set of spreaders to the masthead. Suddenly you run the risk that with enough wind the checkstay could even cause the mast to reverse its curvature with the masthead going forward and the lower part held back by the tight checkstay. The wind was not much but enough to load the mainsail close-hauled and verify that the mast remained straight. Braided line density is the key to eliminating constructional elongation over time. The line denotes the measurement point used bythe Jimmy Green Rigging Team. Z-Spars, Isomat.Opposite UNF thread is very rare and will entail changing the whole turnbuckle to avoid a bespoke solution. Rigging Doctor for SK99: 8mm Main 8mm Stainless: Colligo (SK75): 11mm Marlow from Jimmy Green (DM20): 15mm (but 13mm is pretty close) Rigging Doctor for SK99: 10mm The choices get more tricky as Liros don't make every size (no 7, 9 or 11mm). The mysteries of sizing Dyneema standing rigging. Of course, a number of factors affect a rigs lifespan including load, sailing conditions, mileage sailed, age, fatigue from cyclic loading, environmental influences such as salinity and contamination, and frequency of care and maintenance. standing rigging size calculator. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. Please read the instructions completely before you start measuring your rig. After that I went back to looking at the mast track and, no wonder, the mast was perfectly straight on the left-right axis without any curvatures. RIGGINGS AND MASTS CALCULATIONS ONLINE RIGGINGS AND MASTS FREE DATABASE: Just in 10 minutes! A high-performance racer might require a lighter, stronger, lower stretch (i.e. This post has taken an age to research and write. However, between the sites we have found at least four ways of deciding what size is needed. We deal directly with the manufacturers of the sailboat standing rigging components that we sell, and we know the product because we use the product. For 6mm stainless steel the breaking strength is 2880kg. 1. They are not included in our estimate. We were thinking LIROS D-Pro-XTR (SK99) as by far the cheapest option (and as SK99 is stronger than SK78 we should have less creep than the cheapest Marlow option which is SK78). While I would love to buy Marlow as a British company, they are a lot more expensive. I wish the rope companies made the creep properties easier to find. After attempting to sort through the many personal opinions on appropriate wire size for Atticus, Jordan decided to study up on the scantling equations for mathematically determining for ourselves the safest yet most economical size for our rig. By now, I would say, even on cruising boats it is one of the most common rig arrangements. At first, you will only see fields for two loads (Load 1 and Load 2), but once you enter a value for \small x_2 x2, the fields for Load 3 will show up . And yet I have read that once stretched to its working load, regular Dyneema will stabilize and then experience even less creep than DUX. Their page (from 2015) Before Ordering Your Colligo Dux Rigging links to a PDF table for sizing. From Marlow Ropes we have this: Others refer to Elastic Stretch, Constructional Stretch and Creep. only available on wire up to 6mm diameter, because larger diameters are not flexible enough to turn around the tight radius of a thimble without detrimental deformation, the most economical method for professional wire termination, Ideal for fittingonto oversized pins andattachment points with the additionofa stainless steel thimble, can also be used to form a loop for masthead attachment. The eye will serve as your pin center. 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. The lazy rigger screws the turnbuckle on deck a few turns so that he has only to hook the vertical shroud, the V1. 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. We do support educated do-it-yourself sailors if you are confident and understand the rigging process. Our preferences are going to be to tune the rig for a bit higher performance and sail a bit harder than they do but it is still be best source of information we have found. Question When should I replace my standing rigging? Not only will your rig last longer when properly tuned, your boat will sail better, and who doesnt love that! Those details about the differences of heat stretching at Fibre vs braided level are hard to come by. The slightly more expensive Petersen Stainless version (top) is machined from aluminium bronze bar with the open centres offset drilled from both sides making it 20% lighter than forged equivalents and equally strong. But these are for breaking strength of the wire. With this expedient you can shorten the checkstay relative to the runner to the point that you set the checkstay and the runner remains effectively loose. We have had many customers who have found a great deal on a used boat only to discover that they need to spend a small fortune on new rigging. Both SK90 and SK99 are heat stretched at the fiber level so that makes them a little more difficult to heat stretch completely at the braided line level. If the D2s are set correctly setting each pair of runners and checks in turn should not produce any curvature either side from the first spreader to the masthead. That is with the forestay and backstay attached to the masthead as fixed standing rigging that create traction in the opposite direction. You may need to apply pressure to stretch the wire straight, you may find it helpful to use a line or block and tackle. Establish the thread size, type and directionWire terminals that have a thread for connecting to the next component are known as studs.Stud terminals are denoted first by the wire diameter and then the thread type and size because each wire diameter can have more than one thread option.The thread options are generally referred to as downsize, standard and upsize - these are broadly categorised in the same way by all the manufacturers.UNF thread is the most common in the UK, but Metric is always a possibility - bear in mind that the yacht or the mast may have originally been built in Europe where metric threads are more prevalent.Stud terminals are normally Right Hand thread but it is worth checking, especially if they are metric thread on a French built mast. I might have gone for 9mm if Liros offered that. In fact, if the D2s had been too soft, when tightening the checkstay the mast would bend to windward. I have a ketch with 1/4" SS on the main and 3/16" on the Mizzen. On DayBoats, Trailer Sailers and small yachts, a standard 1x19 wire can be bent around a stainless-steel thimble and Talurit pressed into position using a copper ferrule. Many of our do-it-yourself customers with continuous rigs order their rigging with a swaged terminal at the top of the mast and a Sta-Lok or Hi-Mod mechanical fitting for the bottom so they can fit the rigging on site. This curvature lets you bring the fat of the mainsail forward flattening the sail. So you cant simplify this by saying to keep the working load below a certain percentage of break strength. Check that everything is straight and true. Check your spreaders, chainplates and turnbuckles for cracking, fatigue, missing cotter pins/rings, etc. 2.5mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 3mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 4mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 5mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 6mm 1x19 Stainless Steel Wire Standing Rigging Custom Build 7mm 1x19 Stainless Steel Wire Standing Rigging Hence, we have non-structural runners and checks, no backstay and no topping life. Differences emerged immediately, the D1 on the left was about 1cm shorter than the one on the right. You agree that your ultimate purchase and use of Lift-All slings must be determined by you to be appropriate for your specific applications. This especially with loose D2s that do not prevent the section above from bending forward. Seen from the side, the mast showed excessive rake and pre-bend that needed correcting. If you are in any doubt about replicating your existing T terminals, please take some close-up photos with dimensions - the width, shoulder length and overall depth of the T shape. As we were stationary in port and without sails, I could totally ignore the D2s until the end. be exactly level with the same number of turns on the upper and lower par. In the Toss method 25% load was used for each lower shroud to match his example. So we had left-right and fore-aft problems. Runners attachments seen from the mast top 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. This should be a warning. The benefits are less windage and less weight aloft. One area still to be worked out is how much length to allow for creep. Still, as we will be doing the splicing ourselves, it isnt the end of the world if we need to shorten the shrouds once or twice in their life. 50 or so lbs up in the air, which translated to 200 less rail meat lbs! We also set runners and checkstays just for safety. If your design includes lashings (which are normally setup to have plenty of adjustment) then there is only the inconvenience of a tightening a few times initially if you didnt get rid of all the constructional stretch. As mentioned, runners can be used in different ways. There isnt even a topping lift to support the boom when reefing. Driscoll Boat Works and Shelter Island Boat Yard are both within walking distance of Rigworks. For safety and peace of mind, however, sailboat chainplates require attention and possibly upgrading. This means that when the main halyard is released, the boom falls onto the coach-roof. Good question. By giving the D1s a few symmetrical left-right turns we were able to straighten the lower part of the mast. For example, many chainplates are too thin to grip clevis pins correctly. Standing rigging definition, rigging remaining permanently in position as a means of steadying various spars, shrouds, stays, etc. This is considerably less expensive than a full re-rig and, again, may identify issues before they become catastrophic. This on a mast with two sets of spreaders. We will talk here specifically about boats with swept back spreaders. zurich insurance sydney webpack exclude node_modules moorage on lake washington hockeygymnasium stockholm halfords power steering fluid is bowers a gypsy name. Asymmetric Spinnaker Sheet - Boat length x 2.5 to 3. Elastic Stretch is much the same to work with as creep except that it will show up quite quickly, so a few re-tensions in the first few months should sort it. Unfortunately, there are not always visual clues that your rigging has passed its life expectancy. If you need to replace a halyard, please dont pull it out of the mast. 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. All you have to do is input the span of the beam, the magnitude of the point loads, and their distances from support A. This is to avoid the unpleasant situation of having a hard time getting to re-attach one. Consider pulling your rig every 5-6 years to inspect the mast base, chainplates, turnbuckles, wire, etc. Once you know the diameter of the wire, it will give you the load both in kg and as a percentage of its breaking strain. For example, port upper shroud (fig 3) or forestay (fig 1). Replacing your turnbuckles. That is, if the D1s are too tight and the V1s too, we can even force in an inverse curvature. This is a very inexpensive investment (by yachting standards ) to ensure that your rig is in sound condition. With a fractional rig they provide extra support, and become partially structural in reducing the workloads of the last part of the mast not reached by the shrouds. See other options in diagram to the right. The listed prices for standing rigging by model reflect the rigging shown in our diagrams. After attempting to sort through the many personal. Here are a few suggestions. Since this boat is sailed in the Mediterranean we must have a good light wind setup and be able to intervene on the shape of the sail as the wind increases. N.B Selden T terminals are a similar size and shape to the Hasselfors Flat Head design. However we had to make some assumption and one was that each pair of shrouds would be the same length. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. For more information on rig maintenance, visit our prior Ask the Rigger article at http://rigworks.com/maintaining-your-standing-rigging/ and download our rig-care pamphlet at http://rigworks.com/wp-content/uploads/2016/03/Standing-Rigging-Care.pdf. I'm not sure that the distribution of the force on the sail, in force at the top and on the boom, is correct. The next two methods are basically the same but use slightly differnt load levels for the shrouds. Spinnaker Sheet / Guy - Boat length x 2. Although we work closely with the boatyard during the job, you will need to negotiate yard fees (crane, mast lay days, etc.) The Bluewave turnbuckle (bottom) is for racing enthusiasts who want to easily adjust settings on the water. Simple. The best bet is to shop with your old rope in hand. That said, runners and checks play a very important role in stabilising the mast and reducing its stress. Does anyone know if 5/32" is the factory size? I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. I see DSM is coming out with DM20 which is a heat treated pre stretched fiber. Taking the upper and a single lower of 5/16" gives a safety factor of 3.1. Of course, you are welcome to label all your rigging, pack it up and send it to us to replicate.If you live near enough, you can bring the rigging yourself and discuss it with our Rigging team, it will be well worth the trip :-). I'm a little confused. The Gerr method seems to go a bit smaller but all of them are smaller than the OEM rigging on the 10M. We also attached spinnaker halyards one to the left and one to starboard to an eyebolt. NE ropes has STS-HSR. Raise then the equations of equilibrium will be more easy task. Rig designers will calculate the optimum length of the unsupported lengths, or . I.e the mast will go backwards to the first level of spreaders then stard bending forward from there to the masthead. 1x19 Wire Rigging Stainless Steel 1x19 Wire Rope Rigging is the most popular solution for standing rigging on cruising yachts. Find a flat surface large enough that you can fully stretch your rigging out for measurement. 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. Boat Design Net does not necessarily endorse nor share the view of each individual post. Illustrations from left to right below:Bluewave Hook Terminal, Hasselfors Flathead, Hamma spoon, Petersen shroud terminal, OS/BSI T-terminal, Sta-Lok T-terminal and Navtec T-terminal (now discontinued). The list of materials and design stresses are those that ISO 12215-5 standard says that can be used. I will analyze your calculations carefully. My understanding is if you allow for this and pre-stretch your stays you can reduce the need for re-splicing. 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.

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