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Be careful with the Shentu Method. It allows for very large loads on a slab on grade City of Los Angeles recognized this method many years ago but has since retracted allowing it. I have not been able to find any documentation stating why they reversed themselves. Anyone know anything more?

Seismic is a very real concern. The footing for these lifts can get thick in high seismic locations due to the bolt requirements Obviously, you can't predict when an earthquake will hit- so there is a significant risk that the car can be in the elevated position when it occurs. The lift vendors...

If the experienced and mature engineers are remote- who is training the young engineers? Are experienced engineers more efficient when remote? In many cases- yes they are. The new engineers are paying the price for this though. They are not picking up on the knowledge that those remote...

Does anyone have a copy of this code? I am specifically looking for tables 23-K and 23-L (Occupancy Categories and Importance Factors) Thanks

JAE, I was just typing the same thing. Everyone else- please be careful about the word Certify. It is a word that is casually mentioned- but has significant implications. As engineers, we should not be certifying construction

If they are doing work in California, the manufacturers likely have this testing. Kolpak does.

Check with the manufacturer- They should have testing

Just a note: Non-Competes and Non-Solisitation agreements are two different things. Non-competes generally restrict someone from getting another job in the same field- this is what the government has concerns with. Non-solicitations indicate that you won't pursue company clients for a period of...

Be careful how often you do that DTS491. After a few of these- potential employers start to wonder why you can't hold a job. If I see a resume with 5 jobs in the last 10 years- it's going in the trash.

I agree- In high seismic areas, 12 ga splay wire does not pencil out. Look at 8 ga. It's a little more common than 9 ga. In reality- the code required 4 psf DL for a lay in ceiling is very conservative. I suspect that some municipalities that provide "approved standards" may take this into...

Is the 200 lb. point load (or 50 plf) ASD or ULT? Most everything else in the code is being set up as ULT loads now- but this number has not changed in many code cycles. I suspect it is intended to be an ASD load.

In case anyone is interested, the wire institute responded: The 216 refers to spacing in inches of the longitudinal and transverse wires, respectively, while the 49 refers to wire gauge of the longitudinal and transverse wires, respectively. In this case, the style represents 4 gauge wires...

Thanks JedClampett, Good info

Looking at plans from 1955 where they call out one way CIP slab reinforcing as "216-49 wire mesh" Does anyone have literature on this type of mesh? Thanks in advance

Does anyone have load tables for TJ50 joists from 1984? Thanks in advance

Thanks Everyone

Thanks Dhengr, Are you aware of any code commentary for this? I was not able to find any. Looking for that commentary was the purpose of this post. The way I read this, Ev (from ASCE7) is separate (and additive) from this load.

Thanks. Good idea to look up commentary on older copies of the UMC, but I could not find anything more on this either.

Thanks- I did see that section of the CMC code. I was hoping for some background as to why this load is so high. John McClane probably tops out at around 200 lbs, so it would take 4 of him to reach this load.

In this particular case, it would be a type I restaurant kitchen exhaust hood Thanks