I am familiar with the thread in type, but wouldn't it produce a stronger bond to sink the insert into the epoxy before it sets and allow it to form around all of the contours, threads or otherwise?
I'm having a hard time warming to the idea of threaded inserts for cleats to be used for springing a boat, especially where substrate is cored.
Peter
Circumnavigator;1189157[COLOR="Blue" said:]Have we lost sight of this application -- two of the four bolts will go though with a heavy backing plate. The other two could go into threaded inserts, epoxied in place.[/COLOR] Since all of these are in shear, not tension, that should be OK.
Yes, a cleat failure can be deadly if anyone is standing in line -- that's why I don't use nylon for my spring lines.
A bunch of these failed in the Ted Williams Tunnel a few years ago, killing a woman when an overhead panel fell on her car. Epoxy maker was sued successfully despite its clear instructions never to use it overhead.
Jim
But the norm on TF is to always assume hurricanes, bad boat handling and survival situations.
Some people experience all of them on an all to regular (or at least expect to) basis and I wonder why they still boat....
But the norm on TF is to always assume hurricanes, bad boat handling and survival situations.
Some people experience all of them on an all to regular (or at least expect to) basis and I wonder why they still boat....
I have no evidence except a ton of construction experience, but I just don't believe inserts qualify as "strong as possible."Securely as POSSIBLE. You made my point.
To use the best/strongest method, may require major reconstruction. As long as you know the probables, that should be good enough. Leave notes for the future owners.
You can almost always break a boat or parts of it if you try hard enough.
But you are correct that assistance towers will strongly evaluate if certain hardware looks like it is suitable for needed loads.
One POS boat that overturned in the inlet that I had to tow in..... I ripped almost every piece of hardware out of it until I gave up and used a piece of 4X4 in the front hatch and attached the towline to it. By the time I got to the dock the foredeck was separating from the hull.
It is hard to know what to expect out of a new boats cleats, let alone a used boat...so the real answer is never expect to much out of any of them and assume under good stress they will fail or break (seen plenty of broken cleats where the screws/bolts were still secure...expecially the galvanized dock ones).
I have no evidence except a ton of construction experience, but I just don't believe inserts qualify as "strong as possible."
Love the visual of a 4x4 in the forward hatch of a boat......
Peter