For those who regularly bid and/or review "performance-specification" or "delegated-design" drawings, what important pieces of information are often left out?
In other words, what should engineers always include for you to price or review a job effectively that you often don't get? Posted anonymously by a member for discussion. Discuss this | Subscribe
5 Comments
Jon Sullivan
1/17/2019 10:07:46 am
A helpful part of this discussion would also be - what information do you frequently get on drawings that is not helpful and makes it harder to do your job?
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Joe Meyer
1/17/2019 03:57:43 pm
Agreed! For whatever reason I still see service lines stub up and into the building over 10 feet in from an exterior wall, without any covered trenching or regards to floor types. Not good.
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PETE
1/17/2019 10:27:43 am
I've run into preaction systems with linear heat detection that are in a Class 1 Div 2 Hazardous Location. This was where there were H2 generators for lift truck fueling. The FP drawings don't necessarily call it out, and it may not be caught in the permitting review, but it is implicit in the Electrical drawings that everything in that area will be C1D2 compliant. That means for the linear heat detection, you will need to purchase the listed intrinsic safety barrier for however many feet of cable they're listed for. I've also worked on jobs on which they are processing their own water, and it wasn't clear from the mechanical equipment matrix which pumps are being used in which location, how they are designed to be set up (i.e. series or parallel). It makes it difficult to size a pump without water supply information. Also, it may be necessary to infer from the use of the building some of the design constraints, i.e. if it is for food processing in the US, then it will likely have to be a USDA inspected facility which means corrosion resistant sprinklers and any exposed pipe is stainless within wash down areas. I think these scenarios can be best addressed by someone with experience on a case-by-case basis, and with more particular details on the type of project. When in doubt, RFI it. With a formal RFI during the pre-bid the estimators often come up with questions that the engineers haven't even thought of, and they are compelled to answer you, sometimes with a little nagging being necessary.
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Dan W
1/17/2019 10:51:43 am
FPE's should only provide the following (IMO):
Reply
PETE
1/17/2019 11:27:04 am
Dan,
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