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Re: Channel

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Thanks

Roger Turk wrote:

> Michael,
>
> A 12M11.8 does appear in my AISC manual, but it is *not* a channel.  It is a
> flanged H-style section and is Junior Beam (12JR11.8).  Flange width is
> 3.063".
>
> S = 12.0 in^3
> I = 72.2 in^4
> A = 3.45 in^2
> r = 0.53 in
>
> Under *Service* loading:
>
> Allowable bending stress = 20,000 psi
> Allowable shear stress = 13,000 psi
> If l*d/(b*t) > 600, allowable bending stress = 12,000,000/[l*d/(b*t)]
>
> where l = unsupported length of compression flange
>       d = depth of section
>       b = width of compression flange
>       t = thickness of compression flange
>
> Hope this helps.
>
> A. Roger Turk, P.E.(Structural)
> Tucson, Arizona
>
> Michael Zaitz wrote:
>
> >>Roger,
>
> I think it is a M12 x 11.8 or at least the 1949 equivalent.  This is a
> different member from the channel I asked about earlier (12L&J11.8).  I am
> using the properties for a M12 x 11.8 and using a yield stress of 33 ksi for a
> quick check.  I wanted to make sure that they are sim.  or if there has been a
> major change in the member properties since then.
>
> Thanks,
>
> Mike<<
>