Base Plate For a single angle

[almohamed]

I am designing a base plate connection and I have choose an anchor rods to be straight rods ISO898-1 Grade 8.8,
now I need to select a suitable nut and washer,, how and what is the suitable type for them???

also this base plate is for s single angle column with only one anchor rod the same shape as(Lº) from a plan view
I Have check it manually but I need to verify via software ,what program have this type of conenctions

 

[Mohammad_Structural]

You can use the Profis Anchor Software by Hilti (I think their website has a free trial version that you can use)

 

[dozer]

Profis does not include angles in their shapes for columns.

 

[jayrod12]

Their shapes are just for graphical representation no?

An unless it is only pure axial load, it won't run anyway as without two anchors it's unstable.

 

[TLHS]

It isn't necessarily unstable with one anchor. The system might be axial and pure shear (pin connection). Alternately, I've seen a single anchor used for low moments where you assume tension in the bolt and compression through bearing on the surface below the plate. I wouldn't generally use it, but I've seen it done.

 

[dozer]

TLHS is correct. I just tried using one bolt off center in the base plate in PROFIS with only tension. It correctly figured out that there would be prying action on the bolt and compression on one side of the base plate. It doesn't show how it calculates where the centroid of the compression acts but what it got made sense to me. You could probably fake it out using an available shape for the column and get in the ball park, although I'm not sure I would trust the suggested base plate thickness it gives.

Almohamed, it seems no one wants to tackle your question about nuts and washers. I'm in the U.S. so I don't deal with ISO standard fasteners but I would have guessed (emphasis on guessed) that you would use an ISO 898-2 Class 8 nut. Maybe for washers use ISO 887. Now I'm really guessing. Just throwing ideas out so you can start a search. Your googler is not broken is it?

 

[KootK]

I'm hoping that this is not a connection transferring serious moment as that would seem to be an analytical pain in the neck for most angle orientations. For axial only load, I'd go with an effective width paralleling the geometry of the angle itself, similar to the sketch shown below for wide flange columns.

As for the washer and nut, there should be a companion specification noted in the bolt specification for that. Based on this Link, the right hardware is the compatible ISO 898-2 Gr.8. For most bolt related questions, I find that the best answer is a call to our friends at Portland Bolt. They're wicked good at fielding bolt related technical questions. For free no less.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.