By giving the D1s a few symmetrical left-right turns we were able to straighten the lower part of the mast. Please do. standing rigging size calculator. The original spec. For 6.5mm stainless steel the breaking strength is 3220kg. 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). My understanding is if you allow for this and pre-stretch your stays you can reduce the need for re-splicing. Once swaged, the terminal cannot be re-used or positionally adjusted. You cant cut corners and get the same results as the pros. This means that when the main halyard is released, the boom falls onto the coach-roof. 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. This is the same both on Mini 650s and on Class40s. This fudge factor is intended to offset the fact that, regardless of the material used, it will degrade over time with aging and a lack of maintenance. That is, it is no longer one of the elements of the standing rigging (albeit adjustable). 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.). After attempting to sort through the many personal. A high-performance racer might require a lighter, stronger, lower stretch (i.e. Keith Anderson is a 40-year veteran of the crane and rigging industry. Re-rigs - Petersen Custom Rigging They replace the topping lift and support the boom. Check the deck around the chainplates and mast for cracking and delamination. Those details about the differences of heat stretching at Fibre vs braided level are hard to come by. In our case the mast bent too far forward and the forestay was particularly soft. 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. So you cant simplify this by saying to keep the working load below a certain percentage of break strength. Effect of angle on capacity. Lets consider the mast of a Class40, with two orders of swept back spreaders and its standing rigging. 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. On this Class40 the runner was attached to the first pulley and therefore its length was a given and could not be adjusted. Take your measurements from pin center to pin center as seen in the diagram. The rig of this boat is not particularly extreme or delicate, being the Class40s designed for great ocean navigation. Chainplates Revisited - Practical Sailor Ill add Dynice Dux back into the pricing and options. Global Solo Challenge Copyright 2022. 3/16" for lower shrouds is also what I had. Seen from the side, the mast showed excessive rake and pre-bend that needed correcting. I am not aware of any such cases among Class40s. The above will give a total minimum weight on each leg of the sling of 2,000 pounds divided by 2 legs or . You can use a large nail or screw on the dock. This also serves as your pin center measuring point. Sizes .172 to .375 and 4.4mm to 9.5mm. Discontinuous rigging is made up of shorter sections of wire that connect to each other at the spreader tips. 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. The bend instead arises from compression of the mast given by the tension of the V1s, these pull down the mast that bends forward. Learn how your comment data is processed. The most popular choice is the Stalok version (top) which utilises a chrome-plated, forged bronze body. increasing and consolidating standing rigging size Reefing Line (reef 1) - Boom length x 2.5. The lazy rigger screws the turnbuckle on deck a few turns so that he has only to hook the vertical shroud, the V1. RM30 is the force that is required to heel the boat over 30 degrees. We are ruling this one out for us. 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. Their sizing post is Sizing for Creep. The Dyneema sizes can all be 10mm except the Liros D Pro Static [DFM20] which would need to go upto 12mm (no 11mm available). The Pogo 2, designed around 2003-2004 is the Mini 650 with most boats built. Replacing Your Standing Rigging - RIGWORKS INC. 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. for a mid 20 ft boat, the same change in riggin saved as little as 50 lbs. Sounds interesting regardless. The overall rake was still excessive. Add shackles and splices from our Running Rigging Builder Check your spreaders, chainplates and turnbuckles for cracking, fatigue, missing cotter pins/rings, etc. The Gerr method seems to go a bit smaller but all of them are smaller than the OEM rigging on the 10M. The next two methods are basically the same but use slightly differnt load levels for the shrouds. Beam Load Calculator So in all fairness, I was trusting my eyes. The Supajust Eye Toggleand Swage (bottom) is a high specification stainless steel open body turnbuckle. We do support educated do-it-yourself sailors if you are confident and understand the rigging process. In this case the forestay does not reach the masthead but only up to seven eighths or nine tenths of the mast height and so do the attachments of the shrouds. Write down the number and move on to the next stay. This App is a tool that facilitates the calculation of basic rigging, weights of different profiles, and centers of gravity of composite loads. 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. If your rigging includes a shackle with a captive pin, the inside edge of the pin is the bearing point. The terminations for wire vs. rod can be quite different and require a lot of customization. Herb suggests under 15% or even better under 10%. for my sailboat? Jusben Engineers is a major B-BBEE engineering, construction, and maintenance contractor, delivering complex . These work laterally to support the mast. That is with the forestay and backstay attached to the masthead as fixed standing rigging that create traction in the opposite direction. Perform routine cleaning/polishing to remove corrosives, identify chafe points and other damage, and properly tune your standing rigging (shrouds, forestay, backstay). The goal is to give the mast a beautiful shape that does not have strange kinks in its curvature and especially any inversions etc. Question When should I replace my standing rigging? We repeated the exercise for the low diagonals D1s. Your email address will not be published. The tension gauges are especially designed for accurate, repeatable tuning of a sailboat's standing rigging. You can use the righting moment and rig geometry to calculate rig loads. He is the engineering, construction and project management specialist company's chief rigging engineer. This is because upwind mast is fully loaded at just 15-16 knots after which you need to reduce sail. 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. We are happy to help you pick the best rope for your application. Hole diameter-to ensure the new pins will fit correctly. They are adjustable both to raise the boom in port and to put them at rest during navigation. Check that everything is straight and true. 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. In fact, if the D2s had been too soft, when tightening the checkstay the mast would bend to windward. This is especially important for the forestay attachment if it is an integral part of the stemhead fitting. 1/4" is usually 7/16" or 1/2". The overall shroud load is divided up between your shrouds. 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 . For the moment I wanted to see the mast without no tension in the D2s. A DIY Solution to Tired Standing Rigging - Sail Magazine First of all, we unscrewed the turnbuckles of the V1s, whilst holding the upper threaded part integral together with the turnbuckle. That said, runners and checks play a very important role in stabilising the mast and reducing its stress. 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). Rust and discoloration can indicate the location of a crack or crystallization of the metal. The eye will serve as your pin center. I need to do some more study and number crunching. They make the information from manufacturers such Marlow rather more accessible. This is possible because the rod shroud is free to rotate inside its T-Cup at the spreader. At this point many of our customers choose to ship their rigging to our shop in Miami Florida where we will duplicate it exactly. To do this we tighten the runner with the checkstay lashing very short to start with. When buying new running rigging (i.e. The spreaders are not perpendicular to the fore-aft axis but swept towards the stern on the horizontal plane. The second is a calculation based on the current rigging size. 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). Can you break it down for me? Driscoll Boat Works and Shelter Island Boat Yard are both within walking distance of Rigworks. However we had to make some assumption and one was that each pair of shrouds would be the same length. Can you break it down for me? Global Solo Challenge Copyright 2022. 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). This T-bone, if forgotten closed, supports the mast only at the level of spreaders, leaving the masthead free. 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. Then it made a bend to the right and then back to the left between the second set of spreaders to the masthead. Lift-All Sling Length Calculator Agreement | Lift-All Calculate the length of bury. PS Advisor: Rig Loads and Reefing Lines - Practical Sailor This type of rig, nine tenths fractional, has two orders of spreaders. The strength, minimal elongation, excellent corrosion resistance and general performance of KOS 1x19 construction stainless steel wire are suitable for most sailing yachts. The reality is that Creep, even in SK75, can easily be designed around for standing rigging on a sailboat. 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. 1/2beam is half of the shroud base width In the Toss method 25% load was used for each lower shroud to match his example. Set sail with the benefit of Team Jimmy Green expertise. chunkier appearance than forged parts because the internal grain of the material remains parallel, requiring some faces to be longer to retain strength. Why not schedule annual service as you would with a car? 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. Z-Spars, Isomat.Opposite UNF thread is very rare and will entail changing the whole turnbuckle to avoid a bespoke solution. It was time to move on runners and checkstays to decide if something needed changing. But I mean, why dont hey have prices listed on their site?! We had no option but to intervene by shortening the forestay, which in this case was adjustable. So we measured the total length of the left and starboard turnbuckle system for both the vertical shrouds (V1) and the low diagonals (D1). If your rigging terminal contains a pin remove the pin and use this as your attachment point. Hence, we have non-structural runners and checks, no backstay and no topping life. 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. The wire is inserted into the hollow terminal and pulled through a set of roller dies. The benefits are less windage and less weight aloft. The problem is solved with the introduction of structural lazy jacks.