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

[dlclarkii]

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.

 

[Lion06]

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

 

[whyun]

See Table 2-1 in this MSC article:

http://www.modernsteel.com/Uploads/Issues/January_2004/30725_materials.pdf

 

[dlclarkii]

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.

 

[Rjeffery]

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...

 

[unclesyd]

You might want to take a look at this site.

http://www.williamsform.com/Threaded_Bars/threaded_bars.html

 

[whyun]

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.

 

[whyun]

I was thinking of this article... just couldn't remember which issue it was in. Hopefully it is more useful than the last.

http://www.structuremag.org/OldArchives/2004/august/Code Updates.pdf

 

[vincentpa]

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/getfil...-41e3-b4f1-2c7d32515611&file=SCAN5675_000.pdf

 

[dlclarkii]

Thank you everyone, this is good information!!