Dave Kruger wrote: ...SNIP... > Someone (Chuck Holst?) has already posted the method I use to secure > tiedowns inside the hull: plastic tabs (grey PVC -- NRS sells them, so > does Pacific Water Sports in Seattle, and I've seen some at Alder Creek > in Portland, also) with D-rings attached. Use 3M marine adhesive -- > 5200. And, it really does take 2 days to develop full strength. But, > it's bombproof, if the hull surface is roughened with 50/80 grit first > (ditto the surface of the plastic tab). Dave, I have to disagree with you and the earlier poster (John Somers?) about the use of 3M 5200 adhesive for these D-rings. The adhesive that is recommended for these D-rings by most of the retailers who carry them--including NOC, NRS, and PWS--is a two-part 3M urethane structural adhesive (*not* 3M 5200, which is a very different adhesive). I have been using these D-rings for many years in both kayaks and canoes (I have probably installed over 200 of them), and I have never had one pull free, in spite of plenty banging, yanking, constant tension, and various other abuse. I am not surprised that the person who posted the earlier message had one come loose with 5200. If you use the structural adhesive, prepare the surface properly, and follow the instructions to the letter, your hull will delaminate before the D-ring pulls free. By the way, one final note for any whitewater canoeists out there: the use of these plastic-plate D-rings is no longer recommended for thigh strap tie-downs on Royalex boats. The large plates used for this application stiffen the hull in the location of the plates, which together with the contant flexing of the hull (in shallow rivers) creates a sheer zone along the edge of the plates. After a very long time, this can cause the ABS layer of the hull to crack along the edge of the plates. (BTW, the stiffening is caused by the plate, not the adhesive, which forms a flexible bond.) Of course the D-rings (if properly installed) will remain stuck to the boat long after the hull has cracked. Dan Hagen Bellingham, Washington *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.gasp-seakayak.net/paddlewise/ ***************************************************************************Received on Sat May 09 1998 - 18:27:23 PDT
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