Enciclopedia de yates
Mast step
Mast step on sailing yachts: deck- vs keel-stepped loads, survey moisture risks, and FairHelm limits on guessing from cabin photos.
Qué es
A mast step is the structure that receives the mast heel and spreads compression into the hull or deck. Deck-stepped masts sit on a deck fitting over a compression post; keel-stepped masts land lower in the boat.
Anchor
Nordic boats FairHelm surveys include both deck- and keel-stepped layouts. Soft deck around a step, rusty heel tenons, and wet partners are common survey themes after long winters and leaking mast boots.
FairHelm judgment
FairHelm judgment: treat leaks at the partners, soft sole nearby, and corrosion at the heel as price and survey flags. A painted cabin sole photo does not prove the step bed is dry. Ask how the mast boot and wedges were maintained.
Limits
We do not invent moisture percentage fail lines for every builder. Meter readings need context and a surveyor on that laminate.
Preguntas frecuentes
Q: Is keel-stepped always stronger?
A: Not automatically. Both layouts can be sound or damaged. Structure and water management matter.
Q: Does a dry bilge prove the step is fine?
A: No. Water can sit in partners or under sole boards without a wet bilge show.
Q: Can I check the step afloat only?
A: Some clues yes. Soft deck and heel corrosion often need careful access and sometimes haul context.