standing rigging size calculator

That's a little high because it's using the combined capacity of the lowers and reality will have them loaded differently. Your email address will not be published. Want to prolong the lifespan of your rigging? Their role is to prevent the mast from bending to leeward between the first and second spreader levels, especially upwind. In our search we have found three sites particularly helpful. All the vertical tension turned into compression and bend. That is because a Dyneema line the same strength as the Stainless Steel it replaces would be too stretchy to work. A UK Chartered Engineer and Fellow of the Institution of Mechanical Engineers he has, since 2001, managed the rigging engineering group at Bechtel. But these are for breaking strength of the wire. We use the highest quality standing rigging components available, and we won . 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. A boat with bad rigging is at best a pain in the #@$ and at worst a lethal weapon. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. Imagine bearing away, removing the genoa and hoisting a large spi. You agree that your ultimate purchase and use of Lift-All slings must be determined by you to be appropriate for your specific applications. However, between the sites we have found at least four ways of deciding what size is needed. Our preferred rope supplier, Jimmy Green Marine, has lots of information and a range of Dyneema for standing rigging from different suppliers. This T-bone, if forgotten closed, supports the mast only at the level of spreaders, leaving the masthead free. It is important to do this while the mast is still up and set for normal sailing as this will be the base line to produce your new rigging. If you have a lashing in the design you can have shorter shrouds and a longer lashing so that you have plenty of space to keep tension as creep lengthens the shroud. See other options in diagram to the right. The tension gauges are especially designed for accurate, repeatable tuning of a sailboat's standing rigging. What is meant when we say they are structural? From them we get either 7 or 9mm for the Mizzen and 11mm for the main. There isnt even a topping lift to support the boom when reefing. Confirm Hole Diameters and Pin SizesIt is critical to the load bearing capacity of the rig that the holes and clevis pins are closely matched together without any play.Ordering terminals with pins that are too large fortheir allotted holes onboard will either mean some awkwarddrilling/reaming or starting the ordering process again.N.B. For #1, you might be able to lower the keel 1/4 of an inch, depending upon the size of the boat. For decades now, however, fractional rigs with swept back spreaders have been increasingly widespread. If we follow the table they include from Marlow for their DM20 line (Marlow M-Rig Max) then sizing is huge: 11 or 12mm for the Mizzen and 15mm for the main. Can Galvanised Steel be used with Stainless Steel? This allows us to run high and increase mast bend with a full mainsail. First, we multiply the load by 1.5 to approximate the rest of the righting moment beyond 30 degrees, and divide by half of your 10-foot beam. I can do the reverse test and see if the opposite set causes bend to leeward. This was not the case before, with a perceptible difference of several degrees. be exactly level with the same number of turns on the upper and lower par. Both operations improve upwind performance. 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. Finally, should you decide to sail with that old rigging, consider checking out the Ask the Rigger article titled Rigs Fail Are You Ready? at http://rigworks.com/rigs-fail-ready/. standing rigging. All rights reserved. Historically, the most traditional rig type is the masthead one. Maybe the 10M is not so over-rigged as it appears. Consider pulling your rig every 5-6 years to inspect the mast base, chainplates, turnbuckles, wire, etc. We therefore started by loosening the V1s by two full turns, observing a reduction the bend. Give us a call, and we can give you a rough quote. On this Class40 the runner was attached to the first pulley and therefore its length was a given and could not be adjusted. It provides some tables of the most common suppliers of slings and shackles, but the user can add its own tables. These additions add up quickly and affect the cost of parts, labor, special order shipping, taxes, etc. Whats up? With the mast and rigging still standing and set to its normal sailing positions, tape or mark all the threads of the studs where they exit the turnbuckles. T-terminal and some have more than one common name, but this guide will help you to recognise which ones are correct for your rigging. Keith Anderson is a 40-year veteran of the crane and rigging industry. I replaced 3/16 rigging with 5/16 dynex dux and it's still ok after 10 years. From the Rigger: Lets play Name that Stay Forestay (1 or HS) Read more, Question: What can I do to ensure that my Spinlock Deckvest is well-maintained and ready for the upcoming season? He is the engineering, construction and project management specialist company's chief rigging engineer. 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). With the D2s completeley loose, the D1s were obviously too soft too. 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. Thanks, very interesting and helpful. As we go through the sizing calculations comparisons are difficult as they dont use the same version of Dyneema. They are adjustable both to raise the boom in port and to put them at rest during navigation. This turnbuckle features calibration, one extra-long stud and a fold-out arm to facilitate easy adjustments. When measuring rigging, the convention is to measure from pin center to pin center or from bearing point to bearing point. Keeping your existing turnbucklesCheck the thread type (UNF or Metric) the thread size (standard or upsize)and, just to make sure, the thread direction. Raise then the equations of equilibrium will be more easy task. With a masthead rigged boat, the backstay can be used to increase forestay tension in high winds. A rig inspection beforehand can minimize surprises. The wind was not much but enough to load the mainsail close-hauled and verify that the mast remained straight. That has two ways of calculating the size. RIGGINGS AND MASTS CALCULATIONS ONLINE RIGGINGS AND MASTS FREE DATABASE: Just in 10 minutes! 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. UNF is the normal thread for standing rigging turnbuckles.Metric threads are possible on European manufactured masts - replacements are available.Switching to UNF is a good idea if you are replacing a complete stay because replacement components will be easier to procure.Imperial size wire is also quite rare in Europe, but is readily available in North America.Imperial components can be sourced but will generally attract a bespoke quote and much longer lead times. I have to study the correct way to approach this problem. The forestay turnbuckle in this case, and like on many other boats, was inside the furling drum. If your standing rigging does not match our diagram, or has been modified, then the quoted price is not applicable to your boat. Braided line density is the key to eliminating constructional elongation over time. At the same time, by vertical compression of the mast, tensioning the backstay causes a bending of the mast that flattens the main. - MyR: software for the calculation of masts and rigging. iPhone. We will talk here specifically about boats with swept back spreaders. 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. Their sizing post is Sizing for Creep. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. This means that when the main halyard is released, the boom falls onto the coach-roof. We always look forward to seeing you! 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. Below are some rough guidelines to help you make an educated purchase. We had no doubts having already simulated the effort with checkstays. Effect of angle on capacity. Each complete turn corresponded to approximately 3-4 millimetres in length. I might have gone for 9mm if Liros offered that. 1/2beam is half of the shroud base width Write down the number and move on to the next stay. special care should be taken to ensure that there will be sufficient material left on the tang/eye/plate if youintend toenlarge any holes. That is, it is no longer one of the elements of the standing rigging (albeit adjustable). The rig of this boat is not particularly extreme or delicate, being the Class40s designed for great ocean navigation. Put one end of the tape on the pin at the terminal held in the turnbuckle on deck, then stretch out the tape until you reach the terminal holding the eye to the tang up the mast. If you need to replace a halyard, please dont pull it out of the mast. That is with the forestay and backstay attached to the masthead as fixed standing rigging that create traction in the opposite direction. Differences emerged immediately, the D1 on the left was about 1cm shorter than the one on the right. I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. We are happy to accommodate your requests, but the cost of your job will escalate quickly. 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). As for the adjustments to runners and checkstays, I leave them last, as we will see there are various options on how to use them. I would suggest using larger than 1/4" dyneema. For the Main Im thinking 12mm (larger than either the Colligo and Rigging Doctor calculations) and the largest size of Liros D-Pro-XTR available). Unstep the mast and remove the rigging from the boat. Your email address will not be published. For 6mm stainless steel the breaking strength is 2880kg. Seen from the side, the mast showed excessive rake and pre-bend that needed correcting. 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. In fact, I had sailed on an identical boat for a total of about 60,000 miles. I have a ketch with 1/4" SS on the main and 3/16" on the Mizzen. After this introduction, lets move on to a practical case. It can be minimised by keeping static loads as a small % of the breaking strength, so grades of Dyneema with a higher breaking strengths will creep less under the same load. At Colligo Marine, we have now rigged more than 900 boats around the world with our brand of engineered standing rigging and have learned alot from this experience. To reduce the bend we had to reduce tension of the V1s but also monitor the tension of the D1s. This is because upwind mast is fully loaded at just 15-16 knots after which you need to reduce sail. Please read the instructions completely before you start measuring your rig. If I were only using turnbuckles for tensioning then I might have gone for DM20 to avoid running out of tensioning due to creep. This is why Marlow recommends DM20 for standing rigging, even though the elastic stretch in DM20 is so much more. I am not aware of any such cases among Class40s. Check the deck around the chainplates and mast for cracking and delamination. They are not included in our estimate. Adjusting the rigging of a sailboat is less complicated than you imagine. The standing rigging is all rod on this boat. Condition of sling - passes all inspection criteria. I hear about these guys on every forum everywhere. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. 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. You can also see our newsletter archive here, How to Identify and Specify Your Standing Rigging Components, LIROS Polypropylene Floating Mooring Warps, LIROS Super Yacht Mooring Polyester Docklines, Mooring Lines - LIROS Recommended Diameters, Mooring Warp Length and Configuration Guide, How to estimate the length of a single line Mooring Strop, LIROS 3 Strand Polyester Spliced to Chain, LIROS Octoplait Polyester Spliced to Chain, G3 Calibrated Stainless Steel Anchor Chain, The Jimmy Green Guide to the Best Anchor Ropes, Anchor Rope Break Load and Chain Compatibility Chart, Calibrated Anchor Chain - General Information, Calibrated Chain - Break Load and Weight Guide, Galvanising - Managing Performance and Endurance expectation. One thing I would like to add is the reasoning behind using Dyneema SK75 that is heat stretched for standing rigging Vs the new chemistries like SK90 and SK99 that are heat stretched. Taking V1s and D1s and shaking them, hitting them, you get a feel for their. Rust and discoloration can indicate the location of a crack or crystallization of the metal. If you can get the cap, Colligo, Colligo, Colligo. One area still to be worked out is how much length to allow for creep. See more. Therefore, with a strong breeze, we can intervened on the backstay to reduce the forestay sag and flatten the mainsail. Let us go over your rig from top to bottom and end to end to identify trouble before it gets worse. This is not to say it was already set right, but we had zeroed the lateral tension errors. Please do. My guess is 3/8". Still the biggest name that we have found producing fittings for Dyneema rigging. standing rigging size calculator Archives. This development has become more and more marked with boats with very wide spreaders and without backstay. So these are the sites Ive found most useful in working sizes for our boat. A change of about 1.5cm that was well noticeable at a height of 20 meters. standing rigging size calculator. Then we can help you fine-tune your rope selection and length before cutting. This can be measured by hanging a full bucket of water on the main halyard and letting it hung just above the deck. 119 316 grade stainless steel Wire Rope (1 group of 19 wires, very stiff with low stretch) is standard on most sailboats. 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. Contrary to popular thought, a slack rig is more punishing on a hull than a properly adjusted, tight rig. Continuous rigs require fewer terminal fittings which reduces costs and allows for easier inspection of terminals. Lets be very conservative and assume we are looking at existing stainless 6.5mm for the mizzen and 8mm for the main (will check as soon as we are allowed to visit the boat). 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. So we had left-right and fore-aft problems. Lay out the wire and attach one end of your wire segment to a secure fixed point. The mysteries of sizing Dyneema standing rigging. Tensioning the backstay, the central part of the mast advances forward creating a slight C shape of the mast seen from the side. The next two methods are basically the same but use slightly differnt load levels for the shrouds. Z-Spars, Isomat.Opposite UNF thread is very rare and will entail changing the whole turnbuckle to avoid a bespoke solution. The simplest and quickest way is to use a rig-tension meter, such as the Loos gauge. It is adopted by shipyards such as Jeanneau and Beneteau, even for boats without oceanic ambitions. Designers typically specify standing rigging and attachments, including bolts, that are 1.3 to 1.4 times stronger than the calculated load. 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. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. Could someone please speak of the advantages / disadvantages of increasing the. rope), you will want to consider length, diameter, stretch/performance, material/construction and, of course, price. Their role is not simply to contain the main when dowsing it. The list of materials and design stresses are those that ISO 12215-5 standard says that can be used. The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. 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. So, in order to avoid any dangers, we set the inner forestay (to double up with the forestay). Be aware that this is not a simple conversion and can be quite expensive. There is nothing more expensive than a cheap boat! Having worked and checked with runners and checks the sea trial was more for the pleasure of ending the day with some sailing. But I mean, why dont hey have prices listed on their site?! ). Our riggers can also tune your rig, either at the dock or under sail. My personal opinion is that when offshore racing it is best to avoid easily avoidable risks. We highly recommend you hire a professional rigger if you are not familiar with this process. 1. This can be estimated with the boat's beam, ballast, draft, and displacement. We have a huge rope wall at Rigworks and are very proud of our selection and expertise. This App is a tool that facilitates the calculation of basic rigging, weights of different profiles, and centers of gravity of composite loads. Others, such as Mr. E.Sponberg, make other distribution of forces. We are Patreons of Rigging Doctor, the combination of their YouTube channel and website has more practical resources on real world cruising use of Dyneema than any other Ive found. The wire is inserted into the hollow terminal and pulled through a set of roller dies. Swaged terminals are manufactured using 1 or more of the 4 processes listed above. And PLEASE do not buy a used boat without a professional rig inspection! In fact, if the D2s had been too soft, when tightening the checkstay the mast would bend to windward. Wire rope is sized/priced by its diameter which . For a -inch turnbuckle with a -inch toggle, the chainplate should be at least inch thick. This is a very inexpensive investment (by yachting standards ) to ensure that your rig is in sound condition. However, DynICE Dux is now back in the running, and with the possibility of 9mm for the Mizzen for about the same price as the 8mm Liros D-Pro-XTR. For the moment I wanted to see the mast without no tension in the D2s. Lets go up whenever there doubt. This will help to prevent metal fatigue.Check the dimensions of the fixing points for your shouds and stays, traditionally known as Chain Plates: The picture below shows a swageless eye terminal (top), a Talurit eye (middle), and a swageeye terminal (bottom).Swageless terminals are characterised by a short overall length and a relatively wide body diameter.Taluritis the process ofpressing the wirein a soft copper ferrule.Swages are slim and relatively long overall. rope than a cruiser. Hence, we have non-structural runners and checks, no backstay and no topping life. The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. Working the 10M rigging figures backwards can give the safety factor Pearson applied to the 10M. Heat stretching is a bit like work hardening so if the fiber is already work hardened then the heat stretching at the braided level does not produce the Densest braided structure that you can get if the Dyneema fiber is not heat stretched before braiding. Cunningham - Boom length x 1. 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. Lower Fore St, Beer, East Devon, EX12 3EG. (contrasted with running rigging). First we wanted to take care of putting the mast straight and solve the problem of its excessive rake. In addition to acting as a support for the mast in general, it allows you to decrease forestay sag without adding compression to the mast. The swept back spreaders ensure that the mast can stand up even without the backstay, which is no longer structural. 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. This meant that the V1s tension encountered no resistance to mast compression. And yet I have read that once stretched to its working load, regular Dyneema will stabilize and then experience even less creep than DUX. Since it was not me who had mounted the mast, I could not be sure that the turnbuckles had been inserted correctly, i.e. This system with T-bone on the checkstay give you maximum flexibility and is obviously suitable for those who know how to use it. Jimmy Green have 100m drums of 8mm in all 3 types of Dyneema from Marlow: Marlow Excel D12 Max 78 (SK78) is 1,145Marlow Excel D12 Max 99 (SK99) is 1,400Marlow M-Rig Max (DM20) is 1,337, LIROS D-Pro-XTR (SK99) is 868LIROS D-Pro Static (DM20) is 1,140, The Hampidjan (recommended by Colligo) 8mm rope is. 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. You can use a large nail or screw on the dock. The best bet is to shop with your old rope in hand. The rake depends on the relationship between the length of the forestay and the shrouds as a whole. On the Class40, even though the boom is made of carbon, we can imagine how much the boom plus mainsail would weigh especially if full of water. We took then tightened the forestay by the same two full turns on the turnbuckle. If you put your hands on the standing rigging without following a sequence and without knowing what you are doing, you end up like a dog chasing its tail. 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. In order to confidently specify a replacement for any element of your standing rigging, you will need to know what your existing components are called and how they are measured.Some end fittings have generic names e.g. It also has a module for calculating continuous beams and large facilities for manage the various materials used in the construction of modern boats. That is, if the D1s are too tight and the V1s too, we can even force in an inverse curvature. The Lift-All Sling/Leg Length Calculator has been designed to assist you in selecting the appropriate size slings for your lifting applications. The Dyneema sizes can all be 10mm except the Liros D Pro Static [DFM20] which would need to go upto 12mm (no 11mm available). Some say 52 diameters, other prefer 72 diameters. In addition to this it was clear that when the starboard runners and checkstay were tensioned, the mast deteriorated in shape. From Marlow Ropes we have this: Others refer to Elastic Stretch, Constructional Stretch and Creep. Type in the parameters 2. The choices get more tricky as Liros dont make every size (no 7, 9 or 11mm). If your rigging terminal contains a pin remove the pin and use this as your attachment point. The second is a calculation based on the current rigging size. Please note this article is a translation and may contain some errors for which I hope youll forgive us! We also set runners and checkstays just for safety. For example, many chainplates are too thin to grip clevis pins correctly. Stainless does not like to be deprived of oxygen, so keep tape off your rigging to avoid anaerobic corrosion. 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. At this point many of our customers choose to ship their rigging to our shop in Miami Florida where we will duplicate it exactly. Standing rigging definition, rigging remaining permanently in position as a means of steadying various spars, shrouds, stays, etc. In terms of suitability for us, we have got that down to this list of basic Dyneema variations (we havent found a comparison between the different ways of treating the same type of Dyneema): Rigging Doctor describes all these (and others that we are not considering), not much has changed since that was written in 2015 apart from the gradual introduction of Bio-based Dyneema (expected to reach 60% of all Dyneema by 2030) and a reduction in the premium pricing for DM20 and SK99.

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