Recent content by JAE

You can also extend horizontal panels of insulation board out from the bottom of the exterior footing some distance – say three or 4 feet. This is common practice when trying to insulate the perimeter, shallow footings against Frost heave. The idea is that the built-up heat under the house slab...

Isn't your slab-on-grade below frost at the perimeter? Usually the inside surface of the grade beam has an added insulating layer installed.

Major significant question. Why does KootK's logo only show Kot? Inquiring minds want to know.

Public welfare and safety. A facade can certainly blow off in a storm and crush the little innocent peoples below. You know it doesn't meet code (at least I assume you do). Only other option would be to satisfy GC#2 with a letter outlining ONLY what they did. Then add a second letter...

We usually try to keep X bracing near the middle of the building due to thermal effects - to minimize overall deflections down the length.

I’ve seen where they have upgraded the event to an 8.2. That’s a big one.

If you don't need the sheathing to transfer lateral loads to a shear wall below - the only reason to do it would be temporary during construction. Once all the roof sheathing is in place, the "whole" of the roof system would probably be quite stable - assuming a hip type roof perhaps.

Here's a detail I've seen used in the past. It uses a post-drilled installed all thread rod and an embedded steel angle clip.

ACI 318 specifically excludes design of slabs-on-grade.

One other thing that is important to realize if you are trying to compare older UBC wind designs to current IBC wind. The UBC used a "fastest mile" wind speed vs. the current 3 second gust speed. For the middle part of the US, this equated to a 70 mph wind vs. a 90 mph under the 3 second gust...

The 1991 UBC used "Occupancy Categories" rather than "Risk Categories". Essentially the same thing but the nomenclature was changed to avoid conflicts with other language in the IBC. See the attached table from the 1991 UBC. This shows the various required importance factors used. The code you...

The 24 could be the gauge of steel. Sometimes these are a building manufacturer's part number.

Won't two layers of seals possibly trap moisture forever? A bad detail I think.

Yes your sketch is roughly what I suggested. The channels look a little small in your sketch compared to the depth of the concrete beam. For conservatism sake I just design the channels to take all the load. Whether they need to be affixed to the beam ends with added anchors (to take out all...

For the side connection type - we've simply embedded a steel plate in the face of the column using headed studs or deformed bar anchors. Then we use a single plate shear connection, welded perpendicular to the embedded plate with simple shear bolts (bearing). There might be some secondary...