standing rigging size calculator standing rigging size calculator

With a masthead rigged boat, the backstay can be used to increase forestay tension in high winds. The choices get more tricky as Liros dont make every size (no 7, 9 or 11mm). There is no backstay at all, which is common on many modern boats. We will talk here specifically about boats with swept back spreaders. Keith Anderson is a 40-year veteran of the crane and rigging industry. Discontinuous rigging is made up of shorter sections of wire that connect to each other at the spreader tips. 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. The swept back spreaders ensure that the mast can stand up even without the backstay, which is no longer structural. The IMS data shows a righting moment at 25 degrees of heel as 716 lbs/degree or 17,900 lbs. Adjusting the rigging of a sailboat is less complicated than you imagine. 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. To preserve the left-right adjustment symmetry, we unscrewed the V1s turnbuckles two full turns each side. 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? 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. After attempting to sort through the many personal. So we are looking at approx 9300kg breaking strain Dyneema. Set sail with the benefit of Team Jimmy Green expertise. The standing rigging is all rod on this boat. Simple. In our case the mast bent too far forward and the forestay was particularly soft. This translates into a less dense braided product that produces more constructional elongation when put under a constant load, like pretension in your rig. If your rigging terminal contains a pin remove the pin and use this as your attachment point. 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. It was time to move on runners and checkstays to decide if something needed changing. Once on deck I noticed that the mast was much better already, the forestay was tighter, even though we hadnt touched the V1s at all. 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 need to replace a halyard, please dont pull it out of the mast. Still the biggest name that we have found producing fittings for Dyneema rigging. This can be estimated with the boat's beam, ballast, draft, and displacement. Be aware that this is not a simple conversion and can be quite expensive. The boom will rise again when we tension the reef line and this rarely even needs the boom to be helped by hand. Label all wire segments indicating their position. I hear about these guys on every forum everywhere. This is possible because the rod shroud is free to rotate inside its T-Cup at the spreader. When the T-bone is undone, the runnner has more relative tension than the checkstay as by undoing the T-bone we have effectively lengthened the checkstay. 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. Can you break it down for me? Each mast section is fitted with wire or rod sized to accept the loads generated at that section of the spar. Hence, we have non-structural runners and checks, no backstay and no topping life. That said, they play a very important role they help provide additional support for the mast. for a mid 20 ft boat, the same change in riggin saved as little as 50 lbs. So, I resorted to trusting my sensorial memory. Please do. Unfortunately, there are not always visual clues that your rigging has passed its life expectancy. So these are the sites Ive found most useful in working sizes for our boat. This means that the threads are not screwed in equally. Boom Vang - Boom length x 2. 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.). 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. Excuse me the question, stays should be placed in a "free-standing mast"?. Your email address will not be published. I might have gone for 9mm if Liros offered that. Thanks John. 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 eye will serve as your pin center. Consider pulling your rig every 5-6 years to inspect the mast base, chainplates, turnbuckles, wire, etc. 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. 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. The very fact that the mast remained straight even when runner and checkstay were tightened gave me good confidence that I had already adjusted the D2s correctly. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. Our running rigging calculator can instantly spec lines for more than 5,000 sailboats. However, in long race, especially single-handed, offshore, it has some human contraindications. The inner forstay and the staysail come up in about 16 knots of wind. Standing rigging definition, rigging remaining permanently in position as a means of steadying various spars, shrouds, stays, etc. 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 . However, between the sites we have found at least four ways of deciding what size is needed. Usually they are made with dyneema and not just simple polyester. I.e., that the problems were only in the adjustments of the turnbuckles. 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. Before adjusting them, however, we could use them to do a test on the adjustment so far of our mast. Want to prolong the lifespan of your rigging? This meant that the V1s tension encountered no resistance to mast compression. The best bet is to shop with your old rope in hand. Sort by: Looking at the mast from the side you could see a beautiful shape without irregularities that gently curved back. The Loos tension gauges take the guesswork out of cable or rod tension adjustment. This explained why the mast started veering to the left. Stretch the wire straight and ensure there are no bends in the wire. Question: My halyard is binding. 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.). I.e. Ill add Dynice Dux back into the pricing and options. 5 languages options can be chosen: English, Spanish, French, German and Portuguese. 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. Spinnaker Sheet / Guy - Boat length x 2. Unstep the mast and remove the rigging from the boat. As a quick side note people often ask if they should switch from rod to wire rigging or vice versa during the re-rig (usually from rod to wire as rod is much more expensive per foot). I need to ensure that the lashing length is enough for me to still tension the shroud at the end of its life. 3/16" for lower shrouds is also what I had. for my sailboat? 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. Rig designers will calculate the optimum length of the unsupported lengths, or . The first is the RM30 heeling test to calculate rig loads. The distance between the halyard and the mast at the boom is your rake. We are not experts but just trying to show our thinking processes. I.e the mast will go backwards to the first level of spreaders then stard bending forward from there to the masthead. They are not included in our estimate. This is why Marlow recommends DM20 for standing rigging, even though the elastic stretch in DM20 is so much more. The price difference of the DM20 lines over SK99 or SK78 is still huge. This App is a tool that facilitates the calculation of basic rigging, weights of different profiles, and centers of gravity of composite loads. I'm not sure that the distribution of the force on the sail, in force at the top and on the boom, is correct. 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. 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. 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. There seems to be a lack of information on the web about the sizing for standing rigging. 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. But have you ever seen a boat so rigged? So the 3 different calculations give us (for the Liros D-Pro-XTR), Colligo (SK75): 7mmMarlow from Jimmy Green (DM20): 12mmRigging Doctor for SK99: 8mm, Colligo (SK75): 11mmMarlow from Jimmy Green (DM20): 15mm (but 13mm is pretty close)Rigging Doctor for SK99: 10mm. So the sites we have used are below and for each I have sized replacements for our Mizzen mast (currently 6mm or 6.5mm Stainless Steel cant be sure until we can visit) and our Main mast (currently 8mm we think). You understand that the calculator provided is for general sling length and size suggestions. Our riggers can also tune your rig, either at the dock or under sail. Those details about the differences of heat stretching at Fibre vs braided level are hard to come by. Like your car, your sailboat needs TLC. 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. The Bluewave turnbuckle (bottom) is for racing enthusiasts who want to easily adjust settings on the water. Learn how your comment data is processed. A change of about 1.5cm that was well noticeable at a height of 20 meters. Add that amount for each splice (it won't amount to even 36 feet in either case), plus the distance around the thimble. The other positive about Dynice DUX is that it is only slightly more expensive than Vectran or Dyneema, vs. PBO which is incredibly expensive. Question: Do you have guidelines for selecting halyards, sheets, etc. Most lines are pre-stretched. The problem is solved with the introduction of structural lazy jacks. 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). Let us go over your rig from top to bottom and end to end to identify trouble before it gets worse. He is the engineering, construction and project management specialist company's chief rigging engineer. Others, such as Mr. E.Sponberg, make other distribution of forces. These additions add up quickly and affect the cost of parts, labor, special order shipping, taxes, etc. The most popular choice is the Stalok version (top) which utilises a chrome-plated, forged bronze body. 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. You can use the righting moment and rig geometry to calculate rig loads. 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. Forum posts represent the experience, opinion, and view of individual users. For example, low stretch is very important in a halyard but not necessarily in a sheet. Taking 70% of the lower shroud capacity gives a safety factor of 3.4. If your standing rigging does not match our diagram, or has been modified, then the quoted price is not applicable to your boat. The terminations for wire vs. rod can be quite different and require a lot of customization. Ive taken the stainless breaking limits from the Marlow table off Jimmy Green (see above). Then we choose what percentage of the breaking strength of the Dyneema we want this to be. This is the same both on Mini 650s and on Class40s. I was satisfied with the shape and only the sea trials could have confirmed the correct setting of the D2. The cost to replace standing rigging obviously varies from boat to boat. 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). Whats up? 1. Make sure your turnbuckle is centered between the studs for accurate measurement. As you size up creep and stretch will always be reduced. Lift-All makes no guarantees that the information provided in the calculator is correct. When buying new running rigging (i.e. From the Rigger: Most boat owners do not climb their masts regularly, but our riggers spend a lot of time up there. 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. On this Class40 the runner was attached to the first pulley and therefore its length was a given and could not be adjusted. Tapped and Formed:Some Swage and Swageless terminals are made of several components.These partsmay be tapped together like the strap toggles below. The lazy rigger screws the turnbuckle on deck a few turns so that he has only to hook the vertical shroud, the V1. 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. All standing rigging is manufactured right here in our rigging shop -- the way it's been since 1984. Write down the number and move on to the next stay. Jordan freshens up on his high school math to calculate what wire size we should order for our new standing rigging. 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. Hole diameter-to ensure the new pins will fit correctly. Thus your list is not suitable and not providing the correct strength for design allowable limits of mast alloy grades. Lets consider the mast of a Class40, with two orders of swept back spreaders and its standing rigging. If they are both too tight the mast becomes straight like a telegraph pole losing its beautiful shape. Cunningham - Boom length x 1. 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. Effect of angle on capacity. Things to look for include corrosion, pitting, cracks, and broken strands or meat hooks on the wire. 1/4" is usually 7/16" or 1/2". special care should be taken to ensure that there will be sufficient material left on the tang/eye/plate if youintend toenlarge any holes. The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. Using Colligo's stretch calculator it looks like I should go with 5/16 and 1/4" Dyneema respectively. You may need to apply pressure to stretch the wire straight, you may find it helpful to use a line or block and tackle. iPhone. The overall rake was still excessive. The evolution started with offshore sailing boats such as the Mini 650s and Class40s and now it is very widespread also among cruising sailboats. Remove any pins from your terminal ends before taking measurements. We have also said that the mast of a Class40 is not quite so bendable and adjustable. Taking the upper and a single lower of 5/16" gives a safety factor of 3.1. But, the overall curve of the three sections of the mast was not yet regular.