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Re: Steel rules of thumb

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rx approx  (.45)d
ry approx (.25)d

Beam Wt. approx. 5M/d for 36ksi, 3.5M/d for 50ksi

Truss Wt. approx 6M/d for 36ksi, approx 4.5M/d for 50ksi

Columns:
Pa approx A(22-.1KL/r)  36ksi
Pa approx A(30-.15KL/r) 50ksi

Steel tonnage approx (Stories/3) + 7psf

Serviceability

Roof Bm d = .5L
Floor Bm d = .6L
Composite Bm d = .55L


Paul Feather

----- Original Message -----
From: "Carter, Charlie" <carter(--nospam--at)aisc.org>
To: <seaint(--nospam--at)seaint.org>
Sent: Tuesday, February 26, 2002 11:17 AM
Subject: Steel rules of thumb


> A few good steel rules of thumb have now been posted. I have been keeping
a
> file of them, including the Ioannides and Ruddy article set, with the idea
> that it would be useful to all to have a single sheet with rules of thumb
> for quick reference. Probably published in AISC's Modern Steel
Construction.
>
> What other steel rules of thumb do you all use? If you'll share them, I'll
> consider including them. Please feel free to reply publically or
provately.
>
> Charlie
>
> ***********************
> P.S. Preregistration deadline for the 2002 North American Steel
Construction
> Conference is March 27. For more information visit www.aisc.org/nascc.html
> or call 312.670.2400.
>
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