Independent guide: Load ratings and fastener sizes come from the hardware maker. This page covers the decisions and the installation principles.
Quick answer
Deck hardware converts rope loads into structure. Each fitting must be sized for its peak load, through-bolted with backing plates, sealed so water cannot reach a cored deck, and positioned so lines lead fairly. Most deck hardware work is driven by leaks, upgrades — such as leading lines aft or adding electric winches — or a change of use.
What deck hardware covers
- primary, secondary and halyard winches
- rope clutches and jammers
- turning blocks, deck organisers and padeyes
- genoa and mainsheet tracks and cars
- cleats, fairleads and stanchion bases
Installation principles
- Size for peak load, not average load.
- Through-bolt with backing plates or reinforced pads.
- Seal the core. On cored decks, remove core around each hole, fill with epoxy, then re-drill.
- Bed properly with a suitable marine sealant.
- Check lead angles. A poor lead causes chafe and friction and overloads blocks.
- Protect wiring for electric winches with correct cable size and circuit protection.
Common projects by boat
- Cruising yachts: leading halyards and reefing lines aft to the cockpit.
- Liveaboards: electric winches for short-handed sailing.
- Racing yachts: re-positioning tracks and adding control lines.
- Catamarans: long runs to a central helm station, mainsheet travellers on the bimini or aft beam.
- Classic yachts: replacing hardware sympathetically with bronze or period-style fittings.
Frequently asked questions
Do deck fittings need backing plates?
Loaded deck hardware such as winches, clutches, padeyes, cleats and tracks should be through-bolted with backing plates or reinforced pads to spread the load. Small washers alone can pull through or crack the deck under peak loads.
Why do deck fittings leak?
Leaks come from failed sealant, movement under load, and fasteners through cored decks without the core being sealed. Good practice is to remove core around each hole, fill with epoxy and re-drill, then bed the fitting with a suitable sealant.