Boat lift bunk board question
Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=47258
Printed Date: April-25-2024 at 10:31am
Topic: Boat lift bunk board question
Posted By: samudj01
Subject: Boat lift bunk board question
Date Posted: March-13-2019 at 6:22pm
For the engineers: I bought a used hydrohoist without bunks (they were stolen). The brackets for the bunks are there which are 2x2 angle sticking straight up. I plan to attach 2x material to the angle with bolts similar to many cable hoist setups I have seen (plan to round edges and carpet). It is a 4400lb lift and the distance (length) between the angle brackets is ~12’.
-what size board should I use?
-the board will only be held by the bolts unless I weld on a tab. Are bolts sufficient and then are two bolts per bracket sufficient?
-plan is grade 5 galvanized bolts. Should I consider others?
Appreciate the feedback.
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78 Ski Tique, 72 Skier w/302's, 93 SN w/351 & 17 GS22 w/zr409
Previous - 99 Sport Nautique w/GT40 and 87 Martinique w/351
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Replies:
Posted By: 8122pbrainard
Date Posted: March-14-2019 at 10:02am
David,
I would go with at least a 2x8 or bigger if you have the vertical room. Also, do check the prop/rudder clearance if the boat sits that far forward on the lift. You will have 8 bolts in shear so I really wouldn't worry too much about the grade of bolt but if you can find grade 5 in a hot dipped galvanized, go for them. Tabs for support of the wood is a nice idea but I don't feel absolutely needed. Do use some heavy large diameter washers on the wood side. Then after a few wet/dry cycles check the bolts for tightness.
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/diaries/details.asp?ID=1622" rel="nofollow -
54 Atom
/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique
64 X55 Dunphy
Keep it original, Pete
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Posted By: samudj01
Date Posted: March-14-2019 at 8:08pm
Thanks for the feedback Pete. This gives me some confidence. I was most worried about the shear strength of the bolts holding the board to the bracket.
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78 Ski Tique, 72 Skier w/302's, 93 SN w/351 & 17 GS22 w/zr409
Previous - 99 Sport Nautique w/GT40 and 87 Martinique w/351
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