DN Specification Interpretations
B. Runner Plank
INTERPRETATIONS OF THE OFFICIAL SPECIFICATIONS BY THE TECHNICAL COMMITTEE
Effective May 31, 2020
B. Runner plank
1/30/88: The overall length of the runner plank (including hardware except pivot bolt) is measured in a straight line from end to end without the skipper in the cockpit.
11/14/88: Gull wing runner plank: In the profile curve of the runner plank lamination, the curve must not reverse direction and in an unloaded condition no part of the curve may be lower than the ends.
7/01/92: The interpretation dated 1/30/88 is changed to read: The overall length of the runner plank (including hardware except pivot bolt) is measured in a straight line from end to end with the runner plank separate from the fuselage.
11/30/98 amended 10/6/2011: The runner plank must be constructed of wood and meet all minimum dimensions in specifications B.1., 2., 3., 4., 5. before the application of external reinforcement and coatings; and meet all the maximum dimensions in specifications B. 1., 2., 3., 4., 5. after the application of any external reinforcement and coatings. Internal fiberglass reinforcement is not allowed. Foam, honeycomb, and other non-wood core materials are not allowed.
1/15/2010: When the use of the reinforcement bar or stiffening element that is associated with the “Kent” style chock does not comply with interpretations I. Fittings dated 1/15/2010, and E. Runners dated 1/15/2010, the bar will be considered part of the chock and must comply with the materials as specified in I. 13. and will be included as hardware in determining the overall length of the runner plank as specified in B.1.
International DN Ice Yacht Racing Assocation
DN North America