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How to Measure Transoms For Boat Swim Platforms

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For platforms we need to know three things:

  1. The length of the platform, which should be 3″ to 6″ (76.2mm to 152.4mm) shorter on each side than the full width of the transom to avoid hard knocks in tight places.
  2. The projection or how far it should go out.
  3. The transom curve or camber to which the platform is to fit. This can be shown as the CAMBER in the length of the platform you want. See “A” & “B” on the drawing below.

CAMBER MEASUREMENT:

Tip: Find a friend! It’s much easier to measure with 4 hands.

Made best on the transom at the height at which you expect to mount the platform. Locate the center of the transom and chalk a vertical line. Take a straight piece of wood, rod, or tubing the same length as the platform you desire. Mark the center of the straight edge, hold it level and square against the transom with the center marks matched. Measure from the ends of the straight edge to the transom. When both measurements are the same, this is the CAMBER figure needed.

SIZE LIMITATION:

The general rule of thumb is that the platform can go as far as (Y), as the bracket goes down the transom (X).

BRACKET MEASUREMENTS:

We recommend brackets for every 2ft of platform. If you are order our brackets, we also need to know how far down on the transom the brackets will go. See “X” in the diagram above. We will also need the transom angle, see diagram below.

The rails arrived today. They are just perfect! Thank you so much for the quick turnaround and great service. I will put up PlasTEAK’s info on my website as well as mention the terrific service you provided. Thanks again.

Will

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