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RE: Fu values in AISC LRFD

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Do you mean why are there three ranges for Fu for A449? If so, it is a function of the A449 spec, which varies with diameter. A325 (and A490) are not listed there because they are already covered in detail in Chapter J and the RCSC Specification.
-----Original Message-----
From: Szuchuan Chang [mailto:szchang(--nospam--at)]
Sent: Friday, March 15, 2002 1:00 AM
Subject: Fu values in AISC LRFD

On the 3rd edition of LRFD, page 16.1-141 & 142


Why do ‘Fu’ values for the A449 bolts listed.  Why the A325 bolts not included?


Szuchuan Chang