Date:         Wed, 25 May 2011 17:20:25 -0700
Reply-To:     Jake de Villiers <crescentbeachguitar@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jake de Villiers <crescentbeachguitar@GMAIL.COM>
Subject:      Re: Place to mount shackles?
Comments: To: David Beierl <dbeierl@attglobal.net>
In-Reply-To:  <4ddd8e98.1c4de50a.571a.061a@mx.google.com>
Content-Type: text/plain; charset=ISO-8859-1

More egg-headery - The van's got a giant tension rod in the front suspension
and that's where I'd pull it from.

In the back?  The bumper mounts are plenty strong - if I had a hitch I'd
replace the bolts with long ones to hook a strap onto...




On Wed, May 25, 2011 at 4:19 PM, David Beierl <dbeierl@attglobal.net> wrote:

> At 06:52 PM 5/25/2011, Scott Daniel  - Turbovans wrote:
>
>> ok,
>> what is the tensile strength, in lbs, of a double loop of 4mm thick
>> sheet metal ?
>>
>
> That's much too general a question to answer, and I suspect you're
> looking for the yield strength anyway.
>
> But on the low end, ASTM A36 mild steel has a yield strength of
> 36,000 psi.  With a safety factor of four that gives you 12,000
> psi.  Figuring out the cross-sectional area of this hypothetical loop
> of metal and looking up data for stronger types of steel are left as
> an exercise for the reader.
>
> Since I'm sure you're talking about usable strength of the Vanagon
> front tie-down point - remember that unless you are pulling directly
> in line with both strips of metal, which is not possible, geometry
> and vector arithmetic enter into the problem.
>
> Yours,
> David
>



--
Jake

1984 Vanagon GL 1.9 WBX - 'The Grey Van'
1986 Westy Weekender/2.5 SOHC Subie - 'Dixie'

Crescent Beach, BC

www.thebassspa.com
www.crescentbeachguitar.com
http://subyjake.googlepages.com/mydixiedarlin%27