Anchor Sizing
Anchor Sizing
(OP)
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.
There are several approaches including ACI 318 App D & AISC.
I was just curious what folks are using.






RE: Anchor Sizing
RE: Anchor Sizing
I feel your pain there.
I do not fully understand the Ductile vs. Brittle requirements of D.4.4.
RE: Anchor Sizing
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?
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
Don't know if that is against forum rules. Maybe one of these days I should read it entirely. :)
RE: Anchor Sizing
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?
RE: Anchor Sizing
RE: Anchor Sizing
Have you tried to attach compressed (zipped) file?
IV
RE: Anchor Sizing
Teguci,
Hilti doesn't give values that comply with App. D. They only give values for non code compliant anchors using ASD.
RE: Anchor Sizing
http://ww
RE: Anchor Sizing
RE: Anchor Sizing
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.
RE: Anchor Sizing
I have the 5th edition.
THanks.
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
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.
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
It has seemed to me for a while that the folks that write the codes are out of touch with the real world where calculations need to be done in real time. Am I starting to sound like an old fart yet? But, at least to me, after you go to construction sites and see how the work is really performed this level of complexity in calculations isn't justified.
RE: Anchor Sizing
I am not even very old and I agree with you.
There are a lot of academic types in the code world. You know, the types the go to school when they are 18 and stay there for life, never having touched a wrench or a calc pad.
I think a lot of this stuff comes from these gusy thinking the codes are neat science projects
RE: Anchor Sizing
RE: Anchor Sizing
I was doing some more side blow out and tension pullout calc's yesterday....i have done these many times but I can never get over what a convoluted mess APP D is
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
RE: Anchor Sizing
You can use through-bolts to attach bollards to slabs as well, probably the only way you can get a bollard to work on 6 or 8 inch slabs.
RE: Anchor Sizing
RE: Anchor Sizing
Not sure how code compliant it is, but PNA has a cast in product for bollard bases. More info at:
http://www.pna-inc.com/products/bollard_base/
Back to Appendix D: Powers Fasteners also has a program for designing to Appendix D with the option to use cast in bolts.