Clevis and rigging pins should not


be bent or deformed, with cotter pins or rings secured and in place. When you go aloft, the first stop is


Figure 7: Arrows indicate bubbles in paint on aluminum mast. This signals corrosion.


mechanical terminals in a uniform, equally spaced manner. When you inspect rigging wire, you are looking for broken strands, unevenness, gaps between strands (Figure 6), kinks in the wire, roughness and discolored strands. You will need to look closely over the entire length of all stays and shrouds. Here’s where the toilet paper comes in- rub it along the wire to see if there is enough roughness that the paper will catch on it. This will indicate possible deterioration.


the mast tangs for the lower shrouds. Look for the usual signs of corrosion, deformation, and then the attachment to the mast. One type of attachment is a T- terminal which slots into a socket in the mast. There may be rivets securing the socket or the spreader brackets. If the mast is painted aluminum, watch for bubbles which can indicate corrosion. (Figure 7) Continue your way on up to the masthead checking all the stays and shrouds. Spreaders — shrouds should


intersect the spreaders at equal angles (Figure 8). The wire needs to be secured to the spreader tip and covered with a boot or something which will protect the genoa. The mast head should receive the same level of inspection. Non-destructive testing using


liquid penetrant is a little messy but can yield results when inspecting rigging. Industry standards are that rigging older than 10 years is suspect and so would be considered eligible for


Canal Boatyard. Seattle’s Finest.


Irwin 65 Arabesque A=B B A


MAST


Figure 8: Spreaders should intersect the shrouds at equal angles. Angle A = Angle B. Spreader boot protects the sail.


this level of testing. The circumstances and use of your boat should be taken into consideration. Hot climate, salt water, and contaminates will accelerate crevice corrosion. Time and stress are what determines how long the rigging is safe and will reliably keep your mast aloft. If you do not feel capable to inspect your rigging, then contact a professional. Jack Wilken, has an extensive boat


building background. Son Alex, has a degree in Marine Carpentry-Wood Construction. They own Seattle Boat Works. jack@seattleboatworks.com


Training. Experience. Professionalism. Radar Blowout


More than a Boatyard Being on the hard shouldn’t be that hard. Canal Boatyard is the right place for you, your family and your boat.


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• Exceptional Services: Coastal Marine Engine, Emerald Harbor Marine and Pacific Fiberglass.


55 Ton Capacity


• Environment: New Discharge Filtration System


• Security: Coded Entry Convenient Ballard Location 4300 11th Ave NW • Seattle • Tel: (206) 784-8408 • www.canalboatyard.com 48° NORTH, JULY 2011 PAGE 36


Raymarine C90W Radar & Plotter • 9” Sunlight Display • US Coastal Charts • 4KW 18” Dome • 10M Cable


Only one at a very special price with $100 factory direct rebate. Raymarine systms are


fully integrated and intuitive to operate.


Upgrade systems this summer!


Raymarine C90W Multifunction Display


Emerald Harbor Marine Located at Elliott Bay Marina & Canal Boatyard


206-285-3632 info@emharbor.com www.emharbor.com


we k n ow t h e wa t e r s


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