[Rhodes22-list] Wind Loads

[Michel Meltzer]

Forget this one, yes they can,

They bow eye get put to the test every time you slam on the break while
trailing, not to mention every boat/bow eye get the 1500 pound lift test
at the plant(i.e. the hanging boats), the 10 inch deck cleat is in petty
thick glass, IIRC fiberglass is rated at 200-400 PSI before deforming,
with any the of backing their should be enough load spread, beside my
boat when thought worst than that on the moorings and their been no
issue on boat breaking loose from mooring from that so, I think this is
a real non issue -mjm

> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org [mailto:rhodes22-list-
> bounces at rhodes22.org] On Behalf Of Bill Effros
> Sent: Friday, January 13, 2006 12:32 AM
> To: The Rhodes 22 mail list
> Subject: [Rhodes22-list] Wind Loads
> 
> Ron,
> 
> I'm with Michael on this one.  I don't believe these wind load factors
> for a minute.
> 
> There's some highly respected guy I keep stumbling across who has
spent
> far more than one summer actually measuring the wind loads, as opposed
> to estimating.  He says that all the standard tables are way off on
the
> high side.  I'll find him again in the course of this discussion.
I'll
> let you know when I do.
> 
> But if we take the numbers provided by Fortress and others at face
> value, do you really think any of your cleats or eyes, mounted in
heavy
> duty Spitzer fiberglass could withstand a sustained force in excess of
> 3/4 ton?  I wouldn't want to be anywhere near a boat subjected to
> anything like that amount of force -- whether the anchors could hold
or
> not.
> 
> I've been on board in 20 knot winds at anchor.  Everything creaks.
It's
> scary.  Don't ever want to do that again.
> 
> I've seen my boat subjected to 300 lbs of force on the bow cleat.  It
> lifts the stern right out of the water.  I wouldn't ever want to see
it
> subjected to 5 times that much load.
> 
> Will get back to relative holding power as a function of shaft angle
> later.
> 
> Bill Effros
> 
> 
> 
> Ronald Lipton wrote:
> 
> > There is a table of wind loads at the fortress site:
> > http://www.fortressanchors.com/safe_anchoring.html
> > It looks like 1600-1700 pounds at 60 mph for a 22ft
> > boat.  The page also shows the relative holding power
> > as a function of angle of the shaft with respect to the
> > bottom.  Parallel to the bottom is 100%, it falls to 10%
> > with a 2:1 scope (looks like about 30 degrees).  This is a faster
> > loss than I had thought.  The difference between 5:1 and
> > 10:1 is about 30% in holding power.
> >
> > I never would have known this stuff if Bill hadn't incited
> > the mob.
> >
> > Ron
> > On Jan 12, 2006, at 9:05 PM, Michel Meltzer wrote:
> >
> >> d)I could not find the tables for windload from the last time, can
> >> someone calculated look/up the load in lb for a rhode22 type of
> >> sailboat, IIRC I estimated about 900lb's at the top number, but I
might
> >> be high.
> >
> >
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
> __________________________________________________
> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list