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E. Runners

  English   Metric
  1.   Max Min   Max Min Steel plate type (steel body with stiffening elements)
    1.   0.27 0.23   6.8 5.9 Plate thickness
    2.   30.00 26.00   762.0 660.4 Plate length
    3.   5.00 3.74   127.0 95.0 Plate heights of at least that part contained in chock. (Note: allow for sharpening.)
    4.   1-1/32 31/32   26.1 24.7 Thickness (contained by chock):
    5. Length and height of runner assembly (plate plus stiffening elements) shall not exceed those allowed for the steel plate. Material, location and cross section of stiffening elements are optional, provided Specifications E-3 and E-4 are not violated.
    6. Method of attaching stiffening elements is optional.
    7. Type of steel plate is optional.
  2. Wood type (wood body with attached steel angle, 'T' section, or steel plate). This means commercially available section. Technical Committee will rule against any special fabrications.
    1.   1-1/32 7/8   26.1 22.3 Thickness of body:
    2.   36 30   914.0 763.0 Length:
    3.   5 4   127.0 101.7 Height of at least that part contained by the chock:
    4.   1-1/32 31/32   26.1 24.7 Thickness (contained by chock):
    5. Body shall be made of wood. Fiberglass may be added. Plate may be attached by bolts, or epoxy or both.
    6. The steel sections allowed are American Standard ¾” (19.1 mm) x ¾” (19.1 mm) x 1/8” (3.3 mm) “angle” and 1” (25.4 mm) x 1” (25.4 mm) x 3/16” (4.8 mm) or ¼” (6.4 mm) “T”. Equivalent metric measure (DIN) sections may be used provided the dimensions are within 20% of those listed.
    7. The 'T' section must not be reduced to less than 75% of its original height by sharpening.
    8.       English       Metric
        Max Min   Max Min
      Wood type with steel insert.
      Insert plate dimensions:
      1.   3 2   76.2 50.8 Width:
      2.   0.2700 0.1875   6.8 4.8 Thickness:
      3.   1 ½ ---   38.1 --- Max. width exposed below wood runner body:
    9. The body of a wood runner may be tapered below the minimum 7/8'' (22.3 mm) thickness at a point 6'' (152 mm) from the front end of the runner body. The body shall not be less than 1/4'' thick at the front end.
  3. Profile of runner is optional with the exception that front ends of all runners shall have a 5/8'' (16 mm) radius or larger.
  4. Runner stiffening elements shall not project laterally more than 3'' (76.2 mm) from runner edge. If runner stiffening elements are used as a weight-bearing component (in contact with ice or snow), they must be totally located within the runner cut specifications (F2).
  5. Steering runner shall be equipped with a strong and effective parking brake at all times.
  6. Weight of any individual runner shall not exceed 17 lbs. (7.7 kg).
  7. Method of attaching runner to chock and chock to plank shall be accomplished as shown in plans.
  8. Methods of providing relative movement of runner with respect to chock shall be as shown in plans.
  9. The leading edge of the runner steel is that portion of the edge forward of the sharpened ice contact edge and higher than ¾” (19 mm) above the ice, measured with the runner in normal sailing position. The sharpened ice contact edge of the runner steel is along the entire bottom edge and extends forward and upward along the edge of the steel to a point not exceeding ¾” (19 mm) above the ice, measured with the runner in normal sailing position. The leading edge must be rounded with no sharp angle point and shall be faired to the sides of the steel as allowed in E.12. The sharpened ice contact edge may be rounded or sharpened to an included angle of not less than 75 degrees. The camber (crown) and shape of the sharpened ice contact edge is optional. Along the sharpened ice contact edge, the rounded edge or the sharpened angle is allowed to be faired to the sides of the steel providing the thickness of the steel of plate, insert style or T runners is not reduced below the allowed minimum. (ref. E.1.a., E.2.f., E.2.h).
  10. Each yacht shall be restricted to the use of nine runners during a regatta.
  11. A maximum of four holes, which are not structurally required, may be drilled in each runner. Holes shall not exceed 1/2''(12.7mm) diameter.
  12. Along the leading edge of the steel (ref. E.9.), the minimum allowed steel thickness of plate, insert style, and T runners must be reached within .394”' (10 mm) measured from the normal tangents of the leading edge (does not apply to 'angle' type runners.)

See Runners Interpretations at the end of the Specifications.