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Old 03-13-2016, 04:44 PM   #21
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Would pour in 2 part foam do the job? We used it in the body channels of rally cars.
I'm not sure foam has the same compression stretch as concrete or compressed sand.
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Old 03-14-2016, 01:27 PM   #22
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Many big box stores have galv pipe up to 3 inch.

If you want robust, its there.
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Old 03-14-2016, 02:00 PM   #23
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Forklift,

I'd definitely keep it away from the boat ... drilling the holes at about a 45 degree angle. And I'd use big pipe and low carbon (mild) steel bolts. But a pair of bands would clamp the pipe in place and make the holes and drilling not necessary. Obviously more expensive. One can bend bolts and save money on the clamps or make smaller ones do.

However I can't belive you'd be drilling holes in the marina's pilings w/o permission. Could you have started your thread w "After asking the marina if it was OK ....... " But I see no sign of it. If it was my marina I'd be annoyed to furious. The marina is'nt yours to mutilate or damage according to your whim. My marina would probably terminate me if I did that. Sorry
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Old 03-14-2016, 05:40 PM   #24
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Forklift,

I'd definitely keep it away from the boat ... drilling the holes at about a 45 degree angle. And I'd use big pipe and low carbon (mild) steel bolts. But a pair of bands would clamp the pipe in place and make the holes and drilling not necessary. Obviously more expensive. One can bend bolts and save money on the clamps or make smaller ones do.

However I can't belive you'd be drilling holes in the marina's pilings w/o permission. Could you have started your thread w "After asking the marina if it was OK ....... " But I see no sign of it. If it was my marina I'd be annoyed to furious. The marina is'nt yours to mutilate or damage according to your whim. My marina would probably terminate me if I did that. Sorry
Eric, nothing personal, but your presuming he did not ask first ? In my neck of the woods that's a little accusatory on your part! Downright impolite! I presume you expected him to hang a permit from his piling while taking the picture? Better yet a picture with the harbor master holding up the OK sign? His boat is right under the harbor master's office window. It would be hard to hide it from him.
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Old 03-17-2016, 07:36 AM   #25
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A couple of thoughts....
*I intentionally faced the lag bolts towards the cleat- my thoughts are that it will provide more strength from the bolts than a side load. You will notice the "green" color of the piling. As I drilled the pilot holes for the 1/2"x10" lag bolts I didn't encounter any rot.
*The benefit of adding this one slider was to keep the aft of the boat pulled to the right, allowing for easy access from the stern. This is an old marina with short finger piers- and a side access was impractical. Obviously cross lines aft would provide a real challenge.
*You will notice the second 5/8" line attached to the cleat with the shore power/ water line secured to it. Consider it a safety line.
A few years back I kept the boat at a marina in Bay St Louis that had slide set ups for the slips prior to Katrina. They allowed me to salvage several of the remaining ones for my slip which I through bolted (yup) to the pilings. These "bent at the ends" we're not nearly as thick as what I just installed. They were galvanized. Noise was tolerable. Cost was affordable.
*The Harbor Master has given me permission to make any improvements that I want- provided they are done well. I recent built this "pier" aft of the boat. No permission asked/ no problems. I yield the floor....Click image for larger version

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Old 03-17-2016, 03:23 PM   #26
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Cool man...as long as the suggestions were taken as helpful and not condescending...all is good...


I am a big believer in making something better for 75% of the time as long as there's a plan "B" in effect such as you have, a safety line, in case...great idea!


A lot of boats have been damaged by people without a clue...so obviously a lot of us wanna make sure your boat is good for you and the next door guys...and it sounds like you have thought it through....
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Old 03-17-2016, 03:38 PM   #27
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If it was'nt for Dave in post #7 .. I would'nt have said anything but forklift made no defense whatsoever. Forklift has been around for a long time and I have high regards for him. We've even PM'd in tha past .. don't remember what about but it was on a positive note. You're right though Cap't Jon I should have kept my mouth shut.

Anyway carry on guys. Our tides are much too big out here even in WA to benefit from this but I love to see DIY stuff like this. Just the sort of thing I'd be likely to dream up.
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Old 03-18-2016, 10:49 AM   #28
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Comments re: adding strength to a steel pipe by sliding more steel inside are marginally wrong; the metal on the outside is doing nearly all the work to resist bending; the metal in the center is doing nothing. That's why tubes are used for structure rather than bars. Worried about strength? Use a bigger pipe. It doesn't have to be any stronger than the breaking strength of any other part of the system, applied to the middle of the pipe.

Adding filler to strengthen a pipe serves only to keep the pipe from kinking; if it's stressed enough to kink, it's close to failure. You can bend tubing farther by preventing kinking but that's not what is being done here.

Comments re: noise: You could drop a piece of PVC pipe around the steel pipe and let the eye try to rattle on that.

Comments re corrosion: Bang on! Cold galvanizing paint, wearing through the galvanizing, the ungalvanized threads, the holes at the mountings, maintenance, threaded holes in the wood, 'nail sickness'.

Comments re vulnerability: Don't let those boltheads, or the pipe, threaten the boat finishes. Putting the pipe around the side of the piling puts the mounting lagscrews or bolts in bending.
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Old 03-18-2016, 11:40 AM   #29
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If using bolts the other end of the bolt sticking out will probably need to be cut off as bolts are only availible in certian lengths. I'd cut off, file off burrs and cap w rubbery plastic like covers that come in all the popular sizes usually in bright colors. But sometimes in dark grey or green.
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