Anchor Sizing 2

[ToadJones]

What are most using these days to size Anchor Rods?
There are several approaches including ACI 318 App D & AISC.
I was just curious what folks are using.

 

[JAE]

We grimace, gag, and guffaw our way through App. D of ACI 318.

 

[ToadJones]

JAE-
I feel your pain there.
I do not fully understand the Ductile vs. Brittle requirements of D.4.4.

 

[Lion06]

A ductile steel element is defined in D.1 as an element with a tensile test elongation of at least 14% and reduction in area of at least 30%. I think most steels that we would use for anchor rods meet this criteria.

As for designing anchor rods, I use Appendix D. I suppose I'll post my spreadsheet and get some input. Take a look at this and let me know what you think.

It's not letting me upload the spreadsheet, I think it's too big. Does anyone know an alternate way to post it?

 

[bones206]

Develop a simpler method for designing anchors so that you can make a spreadsheet that can fit ;-)

 

[bones206]

As you can tell, I am also afflicted with Appendicitis D

 

[slickdeals]

Try uploading it to one of the free file sharing sites such as megaupload,box.net,rapidshare etc. and post the link for download.
Don't know if that is against forum rules. Maybe one of these days I should read it entirely.

 

[ToadJones]

I'm still a little conflicted on the ductile requirement. It seems like it goes further than a material requirement alone and involves properly tying the rods within the pier, etc.

Appendix has been a thorn in my side for a long time now too.
You mix that together with a garbage Design Guide One from AISC and you have a flat out abomination, in my opinion.

Do those of you using ASD in your structural steel design, factor your reactions accordingly in order to use App. D or do you simply size your anchor rods using ASD?

 

[Teguci]

Just go right to the Hilti catelog.

 

[iv63]

StructuralEIT:
Have you tried to attach compressed (zipped) file?
IV

 

[Lion06]

Still not working with the zipped file. I'm out of town the next couple days, but will work on a way to upload it when I get back. Does anyone know of a site to post at like slickdeals talks about?

Teguci,
Hilti doesn't give values that comply with App. D. They only give values for non code compliant anchors using ASD.

 

[bones206]

Hilti has post-installed anchors that comply with IBC and ACI 318 Appendix D. See ESR 1546 for example. Note Section 4.1.1.

http://www.icc-es.org/reports/pdf_files/ICC-ES/ESR-1546.pdf

 

[ron9876]

Try the method in the PCI Design Handbook.

 

[Lion06]

Bones-
I recognize that Hilti has post-installed, code compliant anchors, but they don't give you values for them like they do for the non-code compliant anchors such as HIT HY-150. You still need to go through the App. D equations as well as the equations on AC 300 (I think that's the reference). It's not as simple as going to the Hilti catalog.

 

[ToadJones]

where is it located in the PCI Ron?
I have the 5th edition.

THanks.

 

[ron9876]

Need the 6th Edition. Easy to understand what they are doing.

 

[ToadJones]

I have that one here some where too...point me to a page?

 

[bones206]

SEIT -

I see what you mean now - You can't just pick Hilti anchors with generic capacities, you have to do a unique Appendix D calc for every situation. I thought you meant Hilti anchors can't be designed through Appendix D.

There is also a European equivalent to Appendix D: CEN/TS 1992-4-1:2009. It's similar to Appendix D in it's complexity but also seems more comprehensive and descriptive. More examples. I think it's written by the same gang of anchor gurus that wrote Appendix D.

 

[DHKpeWI]

Some one in our office wrote a spreadsheet based on App. D. The Psi factors are not labeled correctly for the ACI-318 2005, but I think everything else is right.

 

[98102138]

Section 3 of AC308 has some ammendments for the ACI318-08 Ap. D. If to use chemical anchors, use ACI318-08 Ap, D, the ICC-ESR of the anchor and AC308 as reference.