@JAE: I think it is a matter of explaining it to the client that it's in their best interest. The granular over-ex idea is interesting, but that would have to be underneath the slab right? After the grade beams are poured, then the grids between our beams usually have a 5" layer of gravel and...
@MotorCity, I feel that groundwater freezing would be more of an issue than surface runoff and that would depend on, as you said, the water table elevation. The issue is that a particular client is giving us feedback from the contractors and I think it's important that we have a firm and...
By the way, we typically deal with 36" frost depth here in Colorado, depending on the jurisdiction and the location and the application is interior grade beams for PT slab on grade.
We are having a discussion in the office about frost depth requirements for certain interior grade beams. Previously on wood garages and breezeways for multifamily units, we've been specifying frost depth requirements for the interior grade beams in these areas as they are unheated. We are...
Celt, the fact that they are prescriptive is actually the only way I was able to justify not using the strength reductions in my project as the architect had picked a G.A. assembly and then modified it with deeper studs so it's not an assembly coming out of the G.A. manual and the strength...
Many architectural assemblies we see refer to the Gypsum Association (G.A.) Fire Resistance Design Manual. Early on in this manual, there is a note regarding reduction of compressive strength values. It is similar to footnote "m" in the IBC fire-rated assemblies table in Chapter 7. Basically, if...
Ingenuity: Unbonded Cables
rapt: The wedges being jammed too hard sounds plausible. I will verify that the wedge-setting procedure is acceptable on the next pour. As for the current wedges, I will actually be able to see one of them after it's removed and will verify any damage to the wedge...
Before I read the comments and reply, here is a photo of the condition I mentioned in my original post. These are ~120 ft. single live end pull unbonded cables with ~9.5 inches of calculated elongation. These cables are coming up consistently short by 3/4" to 1". Additionally, several cables...
Hi,
I'm working the construction administration on an elevated PT slab project as the EOR and I'm troubleshooting an issue in the elevated slab levels below grade. The elongations are coming out consistently low (between 10-17% low on cables between 50-125 feet). They are all single-end pulls...
First post [smile]
I have recently started designing wooden stud walls using Woodworks Sizer. For a basic interior 2x4 wall, I start out with 2x4 DFL Stud Grade @ 24" on center. Oftentimes, these parameters aren't sufficient due to one criterion or another and I have to either decrease the stud...
