Thanks for the explanations, all. The key being located away from the back of footing and wall makes sense to me for why we wouldn't apply lateral pressure to it.
There's only soil on one side of the building, so the load is unbalanced. There's also very few transverse walls due to the space layout and the shape of the building. So the slab sliding resistance is just 0.6D times a 0.3 coefficient of friction which doesn't add up to much.
Yeah, I'm also counting on the basement slab. Even though it's 100' in length parallel to the direction of the lateral soil force, the slab only contributes about 800 plf to the sliding resistance. That's less than a quarter of the total sliding force. I was a bit shocked by that.
This may be a bit of an unintuitive question, but it is mostly geared around how software treats lateral earth pressure loads on footings of retaining walls and keys of retaining wall footings. In this instance, I am speaking of RetainPro but I believe other software treats it similarly.
In...
Because I found out about this Friday morning and they're pouring the concrete walls starting Monday. The specified couplers would have taken weeks to source at this point apparently which would have amounted to tens of thousands in delays. I already read the fabricator the riot act.
It's absolutely wild to me that something designed to couple two rods together does not have any published load information whatsoever. https://www.portlandbolt.com/technical/faqs/coupling-nut-load-ratings/
Also, I found this table...
So long story short, I have a detail where an A325 bolt is threaded into one side of a coupling nut and the opposite side is rebar embedded in a wall. I originally specified a specific Lenton coupler that the fabricator apparently didn't use. What was supplied was a "Grade 2" coupler which in...
From everything I've read, no, saltwater is worse. Of course, most of these write-ups I've found are addressing the pool parts and components rather than the concrete and reinforcing, but I'm assuming that the same applies to the structure.
Has anyone ever done the structure for a saltwater pool before? We were tasked with designing the containment walls for a rooftop pool, where the EOR already designed a big tank for it and we designed the supplemental walls for the pool that sit inside the main tank. The owner just changed...
A couple comments on the latest posts. First, interrupting the exterior insulation where the brick bears on the foundation completely defeats the purpose of the continuous insulation requirement. Allowing the thermal bridging between the brick and foundation is worse than the original detail...
How does that work with something like brick veneer? Seems impossible to have continuous exterior insulation when the brick is bearing on your foundation. Also, I wasn't really given a reason, but apparently architects hate the exterior insulation option.
It's an aesthetics issue. You don't...
The energy conservation code has - apparently for some time now - had a requirement for insulation at the perimeter of a concrete slab-on-grade. This requirement is pictured below.
The key language in there is "The insulation shall extend downward from the top of the slab". Up until...
Yes, interior. I'm surprised that there's no requirement as leaving a tube column open at the top collects water without much of a means of escape without weep holes. In any event, yes, they just have to drain them but I assume that involves punching through drywall, getting some sort of a...
Ran into a first today. We got a call from a contractor that discovered that several feet of water had gotten inside the HSS columns as the fabricator had omitted the cap plates on several of them. Many of these columns already had drywall around them, so they've got to do a bit of work and...
So this is a strange one...
I'm doing some of the work on a rooftop pool in a cast-in-place concrete building. The roof uses these pavers that are elevated 18" above the concrete roof surface. The pool wants to have a cover on it that has those straps at about 4'-0" o.c. or so. The...
Thanks for the replies everyone, but this question was more theoretical in nature and not exactly limited to this one case I have. Yes, there is an interior slab in this case, but it may not be poured for months after the wall is backfilled and on future cases there may not be a slab at all...
Yes, it's 103 plf undrained active. I already talked to the geotech about it because I thought it was a misprint. It's like 40% higher than the highest value I've ever seen.
