I work for a design/build construction company who never tests concrete......

[ARS97]

Just like the title says. I'm a structural engineer who works for a medium sized construction company who specializes in industrial projects. These projects usually involve some form of structural concrete, which is typically limited to foundations. (Once in a great while I'll have to deal with something a little more specialized in terms of concrete, but it's rare.) Here's the problem - they never test concrete, unless it's required in the project specifications. (This is also rare since the customers that we deal with normally are not typically "heavy" in terms of specifications.....they are usually looking to us to provide them an adequate product with minimal specifications or requirements.) Basically, when I call out a concrete strength on the design drawings, they call up the local concrete plant, request a mix that meets this strength requirement, and never verify that they're actually getting what they paid for. There are a few reasons why this is done:
1) Concrete testing requires additional cost
2) They think that by simply placing an order for a certain concrete strength is the end of their liability. They think that the batch plant is then responsible for taking it from there.

I've preached about things like "negligence" and "design professional", but it's a hard sell. Aside from citing code requirements (ACI, IBC), how would you approach this? (Citing code requirements isn't usually very convincing to people who don't pay attention to codes.) I'm trying to change the quality control mindset of an entire company, which is a daunting task.

Any help would be appreciated! (NOTE - I also posted this in the concrete testing forum)

 

[ARS97]

Sorry for the late reply guys........I was out a few days. Here's a few responses.......

It's very common for our guys to order higher strength concrete than what is specified. That adds a little insurance.

It's rare that I ever stamp drawings......it isn't something that most of our customers require. Good for me, but I don't understand why the customers wouldn't care about something like that. (I understand that this doesn't relieve me of design responsibility though.)

JedClampett - that's exactly what I've tried to convey (depositions & trials). You're preaching to the choir. The problem is that until something like that happens, I'm simply an alarmist.

hawkaz - I rarely deal with anything other than basic foundations. We don't get into much specialized concrete unless it's a retaining wall or reclaim tunnel.

OHIOMatt - that's the angle I've attempted to take in the past by including specific notes on the design drawings and just raising awareness to all parties. We deal with alot of customers that don't provide any sort of project specifications. Once everyone is aware of the recommendations, I leave the final decision to management.

 

[dik]

andy... it depends on the jurisdiction... but, if you are a registered engineer and are responsible for the documents, the fact that they are not sealed may have little merit.

Dik

 

[ARS97]

dik - I agree. I always assume that anything I do I can be held liable for it. It's easier that way. CYA......