J/Boats J 35 Owner's Manual - page 14
J/80 Owner Guide 14
Copyright
©
J/Boats, Inc., 2007
Production Control
Structure
:
At the center of the J/80 structural design is the main bulkhead. This anchors
the shroud chainplates and attaches directly to the mast bearing beam and keel support
grid. The construction of this bulkhead is similar to the hull, except that the bulkhead is
solid fiberglass in areas where the chainplates are attached. All structural keel frames
are infused simultaneously with the hull. Bulkheads are bonded to the hull using non-
woven biaxial glass fabrics and high strength adhesives. This provides a strong bond
between the hull, deck, and bulkheads, keeping the yacht "quieter" over time.
ABS Approved Hull/Deck Joint: The extremely strong and watertight hull-to-deck joint
is created by chemically bonding the hull/deck flange overlap with 3M 5200 and
methacrylate adhesive. This yields a bond that is proven superior in strength to a
conventional bolted joint with 3M 5200, with less opportunity for leaks, and less weight
on deck. Essential hardware elements along the deck edge are bolted through this joint
and sealed with Sikaflex bedding compound. Each flange (hull & deck) is supported
with extra glass laminates and designed to withstand high local area stresses from
stanchions, rails, & blocks.
Keel: The J/80 keel is 1,400 lbs, draws 4.9' feet and is manufactured to designer
specified templates and molds. The keel is made of cast lead reinforced with 4%
antimony with high-strength stainless bolts cast into the lead. The molded keel stub
area of the J/80 hull uses multi-layered fiberglass laminates to withstand the high local
loads induced by the keel. Heavy duty fiberglass keel stringers are infused into the stub
in the hull molding process. The lead keel is seated in epoxy and thru-bolted to the stub
and then spray coated with a minimum of four coats of specially formulated epoxy
primer.
Hardware: The J/80 deck is designed to allow simple short-handed operation cockpit.
The power ratio, safe working load, and breaking strength of each piece of hardware
are carefully reviewed in the design process to ensure efficiency, durability, and light
weight. Only the highest quality hardware manufacturers are chosen for each
application. The fastenings are specified for longevity and ease of maintenance. All
deck hardware is bedded with Sikaflex bedding compound with additional laminate
reinforcements incorporated where necessary to ensure reliable fastening. Stanchions,
chainplates and other above deck stainless fittings are custom made and specified by
Pearson engineers.
Spars and Rigging: J/80 spars and rigging are designed for efficiency and performance
by Sparcraft. The standard double spreader aluminum mast and boom are anodized.
Standing rigging is stainless wire with BSI turnbuckles. The running rigging package is
specified to minimize weight and maintain durability.