RAN Sailingvideo
Shroud Loads Are Brutal: This Is How We Handle Them - Ep. 444 RAN Sailing
June 6, 2025 · 30 min · 126K views · Skåne
What this video covers
Johan and Malin reinforce the hull of their custom boat to support the D1 lower shrouds, which they are relocating from the combing to the coach roof to clear the side decks.▶ 7:08 This change increases the compression load on the mast and the tension on the rigging, requiring a structural semi-bulkhead to transfer forces into the hull.▶ 7:55 They construct this bulkhead using a Sapelle core sandwiched between layers of unidirectional carbon fiber, designed to distribute loads over a wide surface area.▶ 11:16 To secure the chain plates, they use 10mm-thick stainless steel flat bars clamped with 10 M20 bolts, opting for a visible, industrial aesthetic over a flush-mounted recess.▶ 15:43 Johan manages the exothermic reaction of deep epoxy pours in the bolt holes by using water-filled bags as heat sinks.▶ 20:42 The final assembly includes massive 125mm fillets to ensure a robust transition between the bulkhead and the hull.▶ 26:25 Overbuilding the structure ensures long-term durability against dynamic rig loads.▶ 28:09
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