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RE: Coefficient of thermal expansion - steel

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The "constant" 6.5e-6/F works just fine for an outdoor pedestrian bridge.  No secants necessary.

Thank you everyone.

Jim

--- Chuck Ritter <riter(--nospam--at)jar.com> wrote:

> Over a range of temperature, the CTE is the slope of secant line of the 
> temperature vs length plot for a temperature range under consideration. 
> Small enough variation in expansion response or in temperature range 
> considered, it becomes the tangent line too. Or it can be a precise CTE at 
> one temperature.
> 
> Unless your buildings somehow have jet engines, I'm not sure you need more 
> than one room temperature value - like 6.5e-6/F. However, stainless steel 
> is substantially higher - 9.2e-6/F for SS304 around room temperature.
> 
> Chuck Ritter
> JAR Associates, Inc
> 401-294-4589
> 401-294-3826 fax
> 
> 
> -----Original Message-----
> From:	Jim Wilson [SMTP:wilsonengineers(--nospam--at)yahoo.com]
> Sent:	Thursday, October 13, 2005 10:30 AM
> To:	seaint(--nospam--at)seaint.org
> Subject:	Coefficient of thermal expansion - steel
> 
> Can anyone help me with defining the coefficient of thermal expansion for 
> steel?  I'm drawing
> blanks everywhere I look.
> 
> Thanks in advance,
> Jim Wilson
> 
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