Diaphragm Fasteners

[Samwise Gamgee]

The diaphragm capacities are significantly different in Hilti Profis software and Vulcraft's software. What am I missing here ? (Please see the screenshots)

 

[phamENG]

Ω

 

[Samwise Gamgee]

So Hilti Profis is not using Ω then ?

 

[MotorCity]

The results are about 50% different. Nucor clearly uses ASD. If Hilti is using LRFD, that would explain the difference.

 

[phamENG]

Hilti doesn't indicate what, if any, Resistance or Safety factors it is or isn't using. Unless there's a settings page to access that'll tell you, that usually means it isn't using either. Just doing a table lookup of the raw value. Then it's up to you to use it appropriately.

 

[Once20036]

Note that a Hilti #10 screw is not the same as a regular #10 screw. there are two different options in the hilti pull down menu. This is probably a small portion of the difference you see.

I wonder if a 5/8" diameter puddle weld is the same as a 5/8" visible diameter spot weld. I don't spec spot welds, but I recall that there's some regional variations about what is measured when you spec a spot weld. If it were me, I`d spend a little time looking into that.

phamEng - Hilti does allow you to pick ASD or LRFD and it does provide the reducation factors, it's just not shown in the summary sheet that Samwise clipped.

 

[Samwise Gamgee]

Yeah , the issue was Hilti was defaulting it to LRFD while I had the Vulcraft calculator for ASD. Also 5/8" puddle weld is same as Arc Spot weld. Thanks for the help