BYYB Forums

Fellow boat builders, Things are progressing very well on my Weekender. Completed the  cabin today.  That part of the project did not come  easy. I think my plywood must be a super grade as it had a mind of its own come bending time. I am looking for a 9" 3/8 eyebolt{cant even find a 10"}. I thought about countersinking an 8". Also what have you guys been using for  the boom?  Plan calls for a 2" full round 12' long. None of my sources here in the UP seem to be helpful.  Any help will be appreciated....Jim Stewart

Greetings Jim,

Just do a Google search on [ eyebolt 10 ] and you will find web sites such as this ... http://www.boltdepot.com/fastener-inform...sions.aspx ... which sells eyebolts as long as 24" along the "B" dimension ...



As for the Boom, just run down to you local Home Depot, Menards, Lowes, 84 Lumber yard, etc, and take a good look at Hand Rail stock, as it is usually about 2" or 2-1/4" in diameter in lengths as long as 16'. There is usually a flat surface milled along its length to facilitate mounting the hand rail to wall brackets. The boom can be mounted so that the flat side is towards the bottom where it will be useful for mounting bails as attachments for the sheet pulleys.

Cheers,
Tom

I've found a step up to a shouldered eye is a better way to go. You can place a washer under it and it'll bottom out cleanly.

Or with a shoe:

http://www.westmarine.com/webapp/wcs/sto...&langId=-1

Forget looking at West Marine. Their Eye bolts are too short.  The best they have is an Eye Nut, with which you could top a threaded rod.
[img height=50]http://content.westmarine.com/images/catalog/full/285199.jpg[/img]
Just don't use it as an attachment for a mooring line as the boat riding the mooring line might eventually spin the nut off.

Grainger has a 10" long 3/8" Shoulder Eye bolt in 316 stainless with a 1200 lb working load limit for $86 ...
http://www.grainger.com/Grainger/KEN-FORGING-Eyebolt-19L198?Pid=search
[img height=150]http://productimages.grainger.com/is/image/Grainger/19L190_AS01?$productdetail$[/img]


Cheaper from US Cargo Control ($16) ...
http://www.uscargocontrol.com/Rigging-Su...g-3-8-x-12
[img height=150]http://images.uscargocontrol.com/8135-shoulder-eye-bolts-stainless-steel-type-316-long-5-16-x-12_1_375.jpg[/img]
Working load limit = 1000 lbs
and more at Long-Shoulder-Eye-Bolt-Stainless-Steel

So, just how strong does the bow eye need to be?

Do we just follow the rule of thumb that hardware must always be as strong as the full-up displacement of the boat loaded with crew and grog?

Cheers,
Tom

A typical bow eye would be sized to twice the full up displacement of the boat as a minimum. This is because  in really big seas, during a storm or a tow in rough water, you can "snatch up" against it, plus the boat's weight, plus any momentum built up. Falling off a 4' wave as the tow boat pulls out the slack can easily exceed double the boat's displacement.