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  #1  
Old 06-16-2020, 09:31 AM
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Can I drill through a boat lift cradle?

I made boat lift guides out of some items laying around the garage. Galvanized fence post, treated 2x4x10's, and trailer carpet. Now the issue is connecting it to the lift cradle. I want drill holes through the poles and through the cradle. Is this possible? Is there a reaction between the metals that could corrode?
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Old 06-16-2020, 09:34 AM
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Wheelin98TJ Wheelin98TJ is online now
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I'm not sure about your question, but my lift guides are clamped to the lift cradle.

With yours being round, you could use a u bolt and a plate on the other side.

Are you sure you want carpeted bunks? My lift has these now and I want them off. They leave marks on the hull and they peel stickers.

I want to swap to poles with PVC over them.
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Old 06-16-2020, 10:34 AM
slalomjunkie slalomjunkie is offline
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Originally Posted by Wheelin98TJ View Post
I'm not sure about your question, but my lift guides are clamped to the lift cradle.
^This...
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Old 06-16-2020, 11:19 AM
MIskiboat MIskiboat is offline
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+1 for vertical guideposts side guides.
Side guides also don’t allow for proper MCOCD wipe down and detail spray on the sides of the boat...
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Old 06-16-2020, 11:47 AM
88 PS190 88 PS190 is online now
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How big of a hole and where it is matters - a small hole in the middle - not a big deal - a large hole near the bottom of the cradle - not a good idea.

U bolts is the correct answer in regards to corrosion - the aluminum may get some surface corrosion and galvanized hardware should be used > stainless as the stainless may gall.
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Old 06-16-2020, 01:34 PM
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Thanks for the replies. I should have mentioned I have a very old shore station from the 90's Its a classic!

I was struggling to find a U bolt that was long enough to reach across the I beam. I never thought of the PITA it will be to wipe down the sides. Well you just made my free project get a little more interesting.
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Old 06-16-2020, 01:36 PM
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If the place you are going to drill into is rectangular I think you'd be fine. If you were to drill into a round surface you would compromise the strength of the lift and it will fold like an Antifa in tear gas.
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Old 06-16-2020, 02:21 PM
curver900 curver900 is offline
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Originally Posted by 88 PS190 View Post
How big of a hole and where it is matters - a small hole in the middle - not a big deal - a large hole near the bottom of the cradle - not a good idea.

U bolts is the correct answer in regards to corrosion - the aluminum may get some surface corrosion and galvanized hardware should be used > stainless as the stainless may gall.
use brass nuts then you are in great shape...
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Old 06-16-2020, 03:15 PM
MIskiboat MIskiboat is offline
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So the old shorestation with the I beam front and back cradle pieces vs the newer v shaped ones? That is old.

I beams are generally ok to drill in middle (aka web). Structurally you wouldn’t want to drill at the ends for a certain amount but middle is ok. You obviously want the ends. Do not drill top or bottom (flanges), that is the strength. The middle / web is really a spacer....

You will be drilling small holes so likely ok.

I’d still rethink and bolt on pipes of some sort vs side bunks.
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Old 06-16-2020, 03:47 PM
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Yes, she is old, but does exactly what I need!

Agreed on looking for other options than trailer carpet. It was just looking me in the face and the carpet on the trailer is still in excellent shape. Appreciate the help all.
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