The information I
provided came from the
testing lab inspector who reviewed the spec supplied by the concrete
called me before our weekly meeting yesterday morning to tell me that
supplied to him was not acceptable. He looked through my general notes
I specify is the strength and the requirement for special deputy
(the testing lab inspector), which I guess was not enough. He provided
the weight of the concrete, the mix ratio (but no mention of aggregate
and the maximum time and temperature that it can remain in the truck
occurs. If you think this is sufficient, then I will write it up as a
the GC to pass on to the concrete company but I believe that I should
something in the spec as to how the testing lab will test the mix and
or not a slump test is required. I don’t think certification by the
concrete company is sufficient if the inspector has already nixed the
What do you
think? BTW, Randy Collier sent
me a spec they us in Louisiana that we can modify and it is a very
complete spec. I’ve sent it on to the inspector so that he can make
modifications to it as he sees fit. I’d planned to use this modified
to send to the GC. It is similar to a Masterspec specification that is
– rather complete.
The Architect had
specifications book but I did not provide any information on structural
than my own General Notes and Observation requirements. Should I have
inspector modify the full Cast-In-Place Concrete Section 0300
pass these along to the GC?
You know, I don’t
recall having to be
this specific on such a small job when doing retrofits years ago. I
had to resolve the problems the GC and the steel company had in setting
frame (delivered fully welded including the base plates) on the
(over the anchor bolts) and under the concrete lintel (existing). I
gave them a
number of suggestions including field welding the base plates or
frame before the erection pads were placed if the city would allow it.
don’t think I should have had to spend this much time solving a
construction methods issue.
What do you think?
BTW, we need to
catch up some time soon.
Best regards to
you and Linda
From: Nels Roselund,
Sent: Friday, October
Subject: Re: Spec
needed for 3000
most small projects, I specify the strength I want
and other characteristics, and then require that the concrete supplier
design along with evidence [a record of previous tests] that the
meets the specified criteria. For a major project, I have had a
consultant associated with a testing lab design the mix using materials
the supplier's bins for in-lab testing of the design.