F1554 G55 Anchor VS Hilti KB TZ Anchor (Shear Load) 2

[Sam_K]

I'm in a difficult situation to determine replacing F1554 G55 Anchor(3/4") to Post-install Hilti KB TZ Wedge Anchor.

They will be installed on concrete wall horizontally, and Tension load is not the issue, but SHEAR LOAD is the key in my project.

I have Hilti product data as below, tensile and shear load but I couldn't find for F1554 Anchor.
For sure I know the 55kips is for tension load only.

is there any clear data I can find of F1554 G55 Shear Load?

 

[milkshakelake]

You can calculate it using ACI 318-08 Appendix D.6. It's probably in newer versions of ACI as well. For a quick back-of-the-envelope type calculation, I'd take As x 0.6 x Fy, which gives around 14.5 kips, but some people use 0.4 instead of 0.6. By the way, I wouldn't look at Hilti's bolt fracture loads; that's different from the actual tested load when the bolt is in concrete. The table you're looking at is just the strength of the steel.

Another way to do it is to use Hilti's own free software to compare the two. I don't like this way, because then you don't really know what you're doing.

 

[Hokie93]

Are you seeking the shear strength of an ASTM F1554, Grade 55 rod, considering only the shear strength of the steel rod itself? If so, and if you are working under IBC 2012 or 2015, then I recommend using AISC 360-10 Equation (J3-1) and Table J3.2 with the tensile stress (F_u) set equal to 75 ksi. The tensile stress is taken from Table 2-6 of the 14th edition AISC Steel Construction Manual. You will need to determine if the anchor rod threads are included or excluded from the shear plane and apply the appropriate factor of safety or strength reduction factor.

 

[Sam_K]

: milkshakelake
Thanks for the advice.
the problem is that I need to submit this and get an approval from the Gov. that means I need to provide calculation with PE stamp but unfortunately I don't have.
I'm trying to submit the product data only meaning not include actual tested load.
I know the actual tested load includes such as Concrete Strength, Anchor Embeds, Wall thickness though.

I found the data from the SIMPSON TIE Epoxy Set Anchor using F1554 G55 which shows shear load in normal concrete.
I know that I'm approaching unprofessional way. but I'm trying to be simple.

 

[milkshakelake]

Sam K - I can't really help you then. It's not technically the right way. Generally, post-installed anchors are not as strong as cast-in-place anchors, and there are very expensive Hilti bolts that give strengths close to cast-in-place, but not the one you're using. And like you mentioned, there are lots of extra factors like embedment, bolt spacing, edge spacing, cracked vs uncracked concrete, concrete reinforcement, and concrete strength. But if it helps, that number looks correct for ASD shear strength of steel. Good luck!