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T.2.7 Anti-Submarine Belt Mounting

T.2.7.1 The Anti-Submarine Belt of a 5 point harness must be mounted with the mounting point in line with or slightly forward of the driver’s Chest to Groin Line with an Anti-Submarine Belt Side View Angle no more than 20°


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T.2.7.2 The Anti-Submarine Belts of a 6 point harness must be mounted in one of the following ways:

a. With the belts going vertically down from the groin, or with an Anti-Submarine Belt Side View Angle up to 20° rearwards. The Anti-Submarine Belt Mount Spacing should be approximately 100 mm apart.


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b. With the Anti-Submarine Belt Mounting Points on the Primary Structure at or near the Lap Belt anchorages, the driver sitting on the Anti-Submarine Belts, and the belts coming up around the groin to the release buckle.


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T.2.7.3 All Anti-Submarine Belts must be installed so that they go in a straight line from the Anti- Submarine Belt Mounting Point(s) without touching any hole in the seat or any other intermediate structure until they reach:

a. The release buckle for the 5 Point Harness mounting per T.2.7.1

b. The first point where the belt touches the driver’s body for the 6 Point Harness mounting per T.2.7.2 without touching any hole in the seat or any other intermediate structure

T.2.7.4 Any bolt used to attach an Anti-Submarine Belt, directly to the chassis or to an intermediate bracket, is a Critical Fasteners, see T.8.2, with a minimum diameter that is the smaller of:

The bolt diameter specified by the manufacturer

8 mm or 5/16”