hokie66, I got confused when he mentioned "you design the rods for tension" because we were pased that stage already, but I guess you are right, the principle is the same, thanks for pointiing that out, my apologies.
I ended up calculating the development length of the anchor taking into account...
a2mfk: it's not like that, what we are tring to find (and actualy I did already with some help, lol) here is the embedment length into concrete of a rock anchor. The contractor and I are assuming it's for uplift i.e. tension (could there be the need for rock anchors to work on compresion in the...
Yup hokie, that could make the trick, but the thing is how do I calculate the resistance? Actually there are two anchors per footing, so I could have a plate bridging from anchor to anchor, but I have to have a justification to that, I mean numbers, i.e. how do I calculate the resistance without...
Another approach: would it be too crazy to consider the shear resistance of the concrete, since the threads exceed by far the spec for regular rebar, times the contact area of the anchor bar? the threads pitch are 8 per in which abides for any A325 nut to be snugged in.
I appreciate your input...
Thaks for your respose...
This anchor bar's Fy is 1035 MPa, as opposed to the 400 for regular rebar. If I calculate with that, the length is way too high, the thing is that the design load for this anchor is 225 kN which divided by 819mm2 of net area, I get a Fy of 276 MPa, no even close to...
Hi everyone,
There is this rock anchor design (vertical) for which the contractor wishes to determine the length of the actual anchor sticking out of the rock and embeded in to the concrete foundation to be able to whithstand the uplift load (225kN). The foundation will be poured on top of the...
