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Re: Galvanized Structural Steel A440

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>ASD Table 1 page 1-7 references an A441 designation.  The tower was 
>originally designed in 1965.
I have a copy of ASTM A441 that came with the old US Steel highway 
structures design handbook. Lukens also supplies it. It's listed as 'High 
Strength Low Alloy Structural Manganese Vanadium Steel,' and is weldable. 
That same handbook also has a copy of A-440 identified as 'High Strength 
Structural Steel.' The spec says it's intended for riveted and bolted 
structures and the chemistry looks fat enough (high carbon and Mn) so I 
doubt if it's really weldable.

Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw(--nospam--at)        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)