Boat lift bunk lengths

Jax

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Picking up my 22 SSLX in a couple of weeks. Those of you who use a boat lift with a similar length pontoon, what length bunks (boards) do you use (12 ft, 14 ft or 16 ft)?
I'm using a pontoon chock (cradle x 4) as supports on the I-beams that are 9 feet apart. Also, how far do your support boards extend from the rear (aft) I-beams? I've read anywhere from 6 to 18 inches. Thanks!
 

Mozekian

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I have a 22' tritoon SPS coming.

Have the chock style too. 38.5" center to center, 77" total left to right across for the chock centers. I beams (horizontal support) are 5' spaced, giving me 16' lift. Boards extend 8" off back
 

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Jax

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I have a 22' tritoon SPS coming.

Have the chock style too. 38.5" center to center, 77" total left to right across for the chock centers. I beams (horizontal support) are 5' spaced, giving me 16' lift. Boards extend 8" off back
That is sturdy for sure. Correct on the 38.5 " from center. Thanks Mozekian! Are those 2 X 4?
 
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