Lack of Support with Flat Horizontal bunk boards?

rothfm

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Joined
Sep 26, 2006
Messages
915
Sorry this is long, I need to be clear....

So another question on my trailer "refresh". Crawled under it all day today. Hope this is it. Saw something I just have to ask about. Last Item I hope!

EZ loader Galv tandem Bunk (4 flat 2x6 bunks) under a 20-21 Walk-around. 2 Keel rollers Just touching Keel.

The Rear of the inner set have heavy 30" bunk supports. The opposite ends of these bunks just sit on the "heads" of standard 10" universal Bolsters.

Since the middle of all these boards "bow"...Most of the weight of the middle and front of the boat , sits on the area about the size of that bolster "head"....I"m asking because I noticed some small spider cracks above 1 of the 2 locations I'm referring to.

My thought was to add a small piece of same pivoting Glavanized bunk support on these inside FOWARD bunks to distribute a bit more of the weight off these small areas. I'm guessing I have some hull flex going on. I say small Support piece ( 12" or so) because the hull is not flat there and rises, the small section would provide the most hull contact.

This setup has been working beautifully for me for 5 years, loads and unloads perfectly. My rework was to replace corroded components and is exactly the same. Just today I noticed the spidering at one location.

Any thoughts are welcomeed.

P.S....I did contemplate using the 2 rollers to take up a little weight, particullarly the foward Roller. Havent as of yet.
 

rothfm

Ensign
Joined
Sep 26, 2006
Messages
915
Not much response here, but I'm leaning on the following as it just makes sense:

Going to get this support/Pic...either leave it as 18" or cut it down to 12" and mount on my two inner bunks. The rear ends already have 30" Stiffeners supporting the motor and back of boat.

Logical due to the flex/sag of a flat 2x6 that ALOT of weight is only on the top of those 2 bolsters, I'm seeing spider cracks directly above one...small "stiffeners" will spread the load down a longer area.

In addition, I'm going to raise my rear and front keel roller brackets, Currently I leave them 1-2" below the keep to prevent contact loading/unloading. I am going to bring them up and take up a "low" amount of weight to relieve the innner bunks a bit.

Otherwise my rebuild came out real good, These additions will give me piece of mind on that spot I noticed, distributing weight more.

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