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What's stronger, F1554 GR 36 Rod OR A325 Bolt
2

What's stronger, F1554 GR 36 Rod OR A325 Bolt

What's stronger, F1554 GR 36 Rod OR A325 Bolt

(OP)
I'm connecting a web plate on each side of a column and I'm using a rod with threaded ends through the column.  The fabricator wants to use F1554 GR 36 rod and I can't find any shear or tensile values, other than that it has the same properties as A36 steel.  I have values for A325 bolts but how does this compare to the F1554 GR 36?  Gr 55 and 105 are also avialable.  I'm using 3/4" diameter fasteners.  Thanks.

RE: What's stronger, F1554 GR 36 Rod OR A325 Bolt

The F1554 has a Fu from 58-80 ksi
A325 has Fu around 105 ksi.

RE: What's stronger, F1554 GR 36 Rod OR A325 Bolt

(OP)
So it appears a A193 GrB7 or A687 is the way to go for a threaded rod that's equal or better than an A325.  I also notice that the F1554 is called an "anchor" rod so it probably shouldn't be used as a threaded rod.  Thanks.

RE: What's stronger, F1554 GR 36 Rod OR A325 Bolt

The commentary in the 13 edition of the Steel construction manual (16.1-208) indicates that ASTM A449 and A354 materials can be substituted for ASTM A325 and A490 when bolts longer than allowed by the ASTM 325 and A490 Specification are required...

RE: What's stronger, F1554 GR 36 Rod OR A325 Bolt

Primary use for anchor rods would be base plate to concrete connections.  See common mistake #1 in this article: http://www.modernsteel.com/Uploads/Issues/December_2004/30736_anchor_rods.pdf

Though the topic is not steel to steel connection, at least it indicates some distiction between high strength bolts and anchor rods.

RE: What's stronger, F1554 GR 36 Rod OR A325 Bolt

The maximum length for A325 and A490 bolts are only like 8" or so.  I believe A449 can be obtained in longer segements. A307 can be obtained in longer lengths.  I am attaching a file from PCA Notes on ACI 318 for F1554 bolts and other bolts.  It is useful for ACI Appendix D calculations.

http://files.engineering.com/getfile.aspx?folder=e2006714-c34e-41e3-b4f1-2c7d32515611&file=SCAN5675_000.pdf

RE: What's stronger, F1554 GR 36 Rod OR A325 Bolt

(OP)
Thank you everyone, this is good information!!

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