On this Class40 the runner was attached to the first pulley and therefore its length was a given and could not be adjusted. Find a flat surface large enough that you can fully stretch your rigging out for measurement. Using our beam load calculator. Generating 3D hull using only picture of boat. I have an older Hallberg Rassy 35 (yep, thats the new challenge) - and currently the rigging appears to be 5/16" wire (that's what the local rigger measured, it seemed slightly smaller to me but he probably does a better job at measurment). When planning Dyneema rigging the area we have found most confusing is deciding on the size of Dyneema we should fit. 1x19 Wire Rigging Stainless Steel 1x19 Wire Rope Rigging is the most popular solution for standing rigging on cruising yachts. So 716 * 30 gives an RM30 of about 21,500 lbs. A high-performance racer might require a lighter, stronger, lower stretch (i.e. This will help to prevent metal fatigue. This yields a shroud load of 6,000 pounds. 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. Differences emerged immediately, the D1 on the left was about 1cm shorter than the one on the right. Can you break it down for me? Marlow recommend one thing, Colligo another, they both swear by the logic! [Update]See the first comment below from John Franta, Colligo Marine where he explains the difference between heat stretching at Fibre level (SK78 and SK99) vs at the Braided level (SK75). The Dyneema sizes can be the same as for the 6mm Stainless above except that the Marlow M-Rig Max (DM20) might be better in 8mm. One of the most frequently asked questions we hear is: How do I measure my sailboat standing rigging? Check the thread size (standard or upsize) Select a turnbuckle which provides articulation e.g. 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.). The t-bone extra adjustment will not give you extraordinary gains and advantages upwind as theres only so much extra bend you can put in with a runner and loose checkstay. 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. Member Album by TANSL | Boat Design Net https://www.boatdesign.net/gallery/albums/member-album-by-tansl.4186/, TANsl https://www.boatscantling-iso-12215.net/, (You must log in or sign up to reply here.). The line denotes the measurement point used bythe Jimmy Green Rigging Team. This can be measured by hanging a full bucket of water on the main halyard and letting it hung just above the deck. The IMS data shows a righting moment at 25 degrees of heel as 716 lbs/degree or 17,900 lbs. To preserve the left-right adjustment symmetry, we unscrewed the V1s turnbuckles two full turns each side. 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. Once the wind increases and we take the first reef, the runner is no longer needed (especially upwind). We wont be re-rigging the main until after the 2021 season so have plenty of time to measure properly. 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. The listed prices for standing rigging by model reflect the rigging shown in our diagrams. be exactly level with the same number of turns on the upper and lower par. Continuous rigging is more common on older and more traditionally rigged boats, while newer boats and performance-oriented sailboats often have discontinuous rigging. 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 evolution started with offshore sailing boats such as the Mini 650s and Class40s and now it is very widespread also among cruising sailboats. We gave the forestay one more turn and removed a turn from the V1s and we were satisfied. 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. Thanks, very interesting and helpful. We will talk here specifically about boats with swept back spreaders. We also set runners and checkstays just for safety. Know-how: Modern Rigs 101 - Sail Magazine 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. Z-Spars, Isomat.Opposite UNF thread is very rare and will entail changing the whole turnbuckle to avoid a bespoke solution. They have been very helpful in responding to email enquiries. iPhone. For 6mm stainless steel the breaking strength is 2880kg. This is the same both on Mini 650s and on Class40s. It is important to use a tape measure under tension and that does not stretch. Standing rigging has been our specialty for over 40 years. RIMAST - Masts and Riggins Calculations With a bent mast the first thing really is to understand was why it is so. With the boat in the water and not wanting to take any risk, we didnt want to get to unhook any turnbuckle. It was time to move on runners and checkstays to decide if something needed changing. Their sizing post is Sizing for Creep. A DIY Solution to Tired Standing Rigging - Sail Magazine Required fields are marked *. We always look forward to seeing you! I.e. 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. We've reduced the choices to a minimum to make ordering as simple as possible. . 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? This system with T-bone on the checkstay give you maximum flexibility and is obviously suitable for those who know how to use it. The second is a calculation based on the current rigging size. Continuous rigs require fewer terminal fittings which reduces costs and allows for easier inspection of terminals. We start by calculating the designed tension of the shrouds by assuming it is no more than 20% of the breaking strain of the stainless steel. And they often find badly damaged Read more, Question: When your riggers talk about standing rigging, they often use terms I dont recognize. Standing rigging is the collective term for the system of wires (or rods) that supports the mast, both fore-and-aft and laterally. Condition of sling - passes all inspection criteria. A rig inspection beforehand can minimize surprises. Check the deck around the chainplates and mast for cracking and delamination. That is, if the D1s are too tight and the V1s too, we can even force in an inverse curvature. Contrary to popular thought, a slack rig is more punishing on a hull than a properly adjusted, tight rig. Thanks John. Chainplates 101: Inspect and Refit | Cruising World Stretch the wire straight and ensure there are no bends in the wire. Cruising boat rigs can have up to three pairs of spreaders, depending on a number of factors, including the boat's size and type. This can be estimated with the boat's beam, ballast, draft, and displacement. But have you ever seen a boat so rigged? Make sure your turnbuckle is centered between the studs for accurate measurement. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. Attachment to the deck, the bottom terminalsDecide whether you are going to replace the turnbuckles (rigging screws) or just the end terminals.If the turnbuckles are the same age as the rest of the standing rigging, or they show any signs of fatigue, it will be prudent tostart afresh with all new components. We are happy to help you pick the best rope for your application. Attachment to the Mast, the top terminals. I'm not sure that the distribution of the force on the sail, in force at the top and on the boom, is correct. It is indeed a complicated process in using a braided line for standing rigging. 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. And both say having lowers at least the same size as uppers is a good idea. For example, many chainplates are too thin to grip clevis pins correctly. As said, the backstay is simply not there, to make room for the square top mainsail. As a side note, alot of people have miss-diagnosed constructional elongation for creep. It is your responsibility to assure that the slings you use are appropriate for your application. Running Rigging Calculator All you do is select your boat model and our calculator instantly specs the size and lengths that will work for you. There seems to be a lack of information on the web about the sizing for standing rigging. Just select your boat below and you're a couple clicks away from new, top quality rigging. chunkier appearance than forged parts because the internal grain of the material remains parallel, requiring some faces to be longer to retain strength. We have also said that the mast of a Class40 is not quite so bendable and adjustable. All standing rigging is manufactured right here in our rigging shop -- the way it's been since 1984. So we had left-right and fore-aft problems. Historically, the most traditional rig type is the masthead one. Speaking of standing rigging we have to open a parenthesis on the types of rigs possible for a sailboat. For 8mm stainless steel the breaking strength is 4640kg. Check that everything is straight and true. That is, it is no longer one of the elements of the standing rigging (albeit adjustable). This is especially important for the forestay attachment if it is an integral part of the stemhead fitting. I think that's the real problem to solve. Looking at the mast from the side you could see a beautiful shape without irregularities that gently curved back. The strength, minimal elongation, excellent corrosion resistance and general performance of KOS 1x19 construction stainless steel wire are suitable for most sailing yachts. 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. This translates into a less dense braided product that produces more constructional elongation when put under a constant load, like pretension in your rig. Tapped and Formed:Some Swage and Swageless terminals are made of several components.These partsmay be tapped together like the strap toggles below. You agree that your ultimate purchase and use of Lift-All slings must be determined by you to be appropriate for your specific applications. But without mast height I suppose this is only partly covering the shroud angle issue? Forged:Some Petersen Stainless terminals are manufactured using a process known as electrical upset forging.The electrical current used internally aligns the grain structure of the stainless steel.The result is a stronger, lighter fitting that is also more resistant to loading fatigue.The picture shows a machined eye (top) which is slightly larger than the relatively minimal forged eye (bottom) for the same size wire. I therefore decided to tighten further the D1s by a turn and the D2s by two. It is your responsibility to assure that the slings you use are appropriate for your application. For a rod of the size we were adjusting we needed a large and very expensive tension measurement tool. I hear about these guys on every forum everywhere. The goal is to give the mast a beautiful shape that does not have strange kinks in its curvature and especially any inversions etc. These are boats where you usually an average setting and not touch it before a specific event. 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. Diameter and performance are determined by your boat length, the function of the rope, and the style of sailing that you do. Rigging Math | SailNet Community That said, runners and checks play a very important role in stabilising the mast and reducing its stress. 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. We highly recommend you hire a professional rigger if you are not familiar with this process. So I'm interested in your opinions. for my sailboat? Im least concerned about Constructional Stretch or bedding in. 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. 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. Reefing Line (reef 2) - Boom length x 3. Those methods give a guide to sizing the wire for the 10M. Having worked and checked with runners and checks the sea trial was more for the pleasure of ending the day with some sailing. Deckvests need to be maintained so that Read more, Genoa Halyard (fractional rig) Mast length x 2, Spinnaker / gennaker halyard Mast length x 2.5, Main Sheet Boat length x 2.5 (varies with the mechanical purchase being used), Asymmetric Spinnaker Sheet Boat length x 2.5 to 3, Reefing Line (reef 1) Boom length x 2.5. The bend instead arises from compression of the mast given by the tension of the V1s, these pull down the mast that bends forward. The experience was refreshing to learn with a degree of mathematical certainty what would be a safe decision rather than relying on the often contradictory opinions that we regularly face. 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. 100m of the 8mm should be plenty for the Mizzen with enough spare to replace several shrouds.Possibly from our back of the envelope calculations 150m of the 12mm for the Main should also give enough for several replacements. This could happen if theres something inherently wrong with the measures taken that would forced you to work at the limit of the available turns. So you cant simplify this by saying to keep the working load below a certain percentage of break strength. We had no option but to intervene by shortening the forestay, which in this case was adjustable. Or maybe a lot of other boats are under-rigged? First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. Once the sail was lowered and the retaining bolts were unscrewed, it was possible to raise the drum and access the forestay turnbuckle. The numbers in the Toss and Henderson calculations were for a 2.5 safety factor. On a Mini 650, to avoid too many lines, and with a boom that weighs a few kilos, nothing replaces the topping lift. Not forgetting the compression loads from the stays too. Overall, if you think you have a part that is not listed here, email a photo to the Jimmy Green Rigging Sales team and we will take a look. Ive taken the stainless breaking limits from the Marlow table off Jimmy Green (see above). 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). If you have any questions, please dont hesitate to call or email us and we would be happy to help you. rope than a cruiser. Please read the instructions completely before you start measuring your rig. We are confident that you will look forward to our emails. This means that when the main halyard is released, the boom falls onto the coach-roof. I jibed without runners in 50 knots of wind and nothing happened. It is important to understand the influence of stay-V1 on the rake. for my sailboat? All the vertical tension turned into compression and bend. So we can put back the T-bone that shortens checkstay and use it as a counter cable for the inner forestay. 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.
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