Concrete Rebar Shop Drawings
Concrete Rebar Shop Drawings
(OP)
Does any body else have trouble getting detailers to provide rebar clear covers, etc. on their placement drawings? If so, does anyone have a "scary" CA note that they find useful to place on the shop dwg review pdfs? This is one of the most annoying peeves of mine. Devil's advocate: Maybe it shouldn't be?






RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
Stamp them 'revise and resubmit' until the clearances are shown..?
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
What does a “scary” California (CA) note have to do with anything? How about, “Reinforcing shop drawings which do not show clear cover to rebar will not be accepted for review and acceptance for construction.” This note as part of you general notes on concrete, on your plans, or in the specs. Maybe people don’t understand your notes because you use acronyms which no one can interpret. When the reader needs to spend more time interpreting, looking up possible meanings of acronyms, than it would have taken you to type it out, that may be a communication not communicated.
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
cvg: I do in my specifications.
Are you telling me that piece marks are not used in the field for placing bend bar? What *are* the placement drawings, then? Some combination of the detailer's and Cd's?
These are the bundles of bars they are going to get in the field with tags on them indicating the piece marks, right? What drawings do they absolutely need to place these bars...the detailing drawings with the piece marks on them, hence placement drawings. If the bundles didn't have the piece marks they would be wasting time measuring the pieces and correlating them with the CD's. I just don't see how else this could be properly performed.
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
* The bar orientation must match the plan (inner / outer layer)
* The rebar cover is correct 3/4" on top, more is not better
* I want to talk to the rebar inspector to make sure that he has both a set of structural drawings and approved shop drawings. I tell him / her to check both and call me with questions.
More often than not, the top rebar cover on elevated slabs is way too low.
RE: Concrete Rebar Shop Drawings
Part B of the ACI 315-99 *seems* clear to me that one of the detailer's responsibilities is bar placement drawings. I wonder how many detailers accept that as true.
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
What is an A4 sheet?
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
A4 measures 297mm x 210mm (29.7cm x 21cm).
RE: Concrete Rebar Shop Drawings
RE: Concrete Rebar Shop Drawings
At first I though CA stood for California as in maybe Caltrans is known to have good strong construction notes.
RE: Concrete Rebar Shop Drawings
I agree - it also useful for the detailer.
hokie66, that is interesting - and somewhat of a reasonable approach.
Thanks, everyone.
RE: Concrete Rebar Shop Drawings
I have found some rebar detailers who DO indicate the cover requirements - but it's not consistent and may vary from detailer to detailer.
IMHO rebar drawings are intended to serve 3 distinct and separate purposes:
The engineer of record is obligated to confirm #1 in his/her review of the rebar drawings.
The fabricator is obligated to cut/bend bars in accordance with #2.
The installer is obligated to install the bars in accordance with BOTH the contract drawings and the rebar drawings. Realistically, the latter should carry more weight as changes are often made in the review process that will never be reflected in updated contract drawings.
Ralph
Structures Consulting
Northeast USA
RE: Concrete Rebar Shop Drawings