ok,
what is the tensile strength, in lbs, of a double loop of 4mm thick sheet
metal ?

----- Original Message -----
From: "David Beierl" <dbeierl@ATTGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, May 25, 2011 2:59 PM
Subject: Re: Place to mount shackles?

> At 05:35 PM 5/25/2011, Karl Wolz wrote:
>>The front tow loop, while not a piece of 12mm rod like the back loops, is
>>also not "sheet metal".  It is the same material of which the frame is
>>made
>>- about 3-4 mm thick, and firmly welded to the frame.
>
> 4 mm thick is 8-ga sheet metal by the Birmingham gauge, and between 8
> ga and 9 ga by the steel gauge and galvanized sheet gauge.  To an
> engineer it's definitely sheet metal.
>
> Thickest gauge by steel guage is 3 ga, which weighs 10 lb per ft^2
> and is .2392" thick.  Generally speaking if you can stamp it in a
> press, it's sheet metal.
>
> Yrs,
> d