huangyhg

aisc 13th edition and 2000 ibc
if i am providing calculations on steel connections for a project governed by the 2000 ibc, is it acceptable to use the aisc 13th edition? i believe the aisc lrfd 3rd edition is referenced in the 2000 ibc.
val
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i would suggest using the 3rd edition lrfd. although i would think the design would probably wind up the same if you used the 13th edition.
i would say no. the aisc 13th ed. has some (not too many, but some) significant changes, even from the 3rd ed. lrfd. as far as connections go, you are allowed something like 50% greater weld strength for welds loaded perpendicular to the length of the weld. this might affect your weld sizes significantly (causing them to be smaller than would be required by the 3rd ed lrfd).
there is no blanket yes or no answer to the op's question. legally, one must follow the aisc edition formally adopted by reference in the governing building code in a given jurisdiction. however, the use of the latest available information may be used provided that the result is better than or equal to the reference adopted in the current building code.
the 50% increase you mention for a weld loaded perpendicular to its axis has been around since the 2nd edition lrfd.
if you're designing under the ibc 2000, then the 3rd lrfd is the specification to design with. if you want to use the 13th edition, at the very least you'd need the blessing of whoever's reviewing/approving the connection design calculations.
typically, chapter 1 of ibc allows the building official to accept alternative methods of compliance and for less stringent provisions of newer codes not yet adopted, it would be adjudicated to the local appeal board. i have not heard of a board denying a variance for a future code provision that will eventually be adopted.
don phillips
thank you for the replies. i went ahead and designed per the reference standards of the governing building code.
val

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