Older(er) Drawing Notation for Concrete Beam Ties
Older(er) Drawing Notation for Concrete Beam Ties
(OP)
Does anyone know what the following designation means. Building is from 1982 in NY, concrete. On plan there is a typical perimeter spandrel beam, shown in section it is noted as having #3@12 closed ties (which does not satisfy d/2) with a note that extra ties are required where "ET" is shown on plan and to refer to the extra tie schedule (schedule is on top/middle of attachment).
The extra tie schedule notes #3 as the size and for spacing uses "Spacing EE" which I am guessing means each end. I had the following guesses:
- 6/5 means 6 ties @5", however they use the @ designation everywhere else for rebar spacing so I don't know why they'd mix it up here
- @6" for the first 5ft?
- 6/5 refers to left/right ends respectively, so 6 ties and 5 ties - but how many, spacing, over what length? Is it implied one extra between each basic shown in section?
There is a beam schedule for other beams in the building and it uses similar designations, i.e. under stirrups it will say "10/6 Bal @ 12". I have a full set of drawings including typical beam details and there is no explanation or abbreviations/symbols section - good set of drawings otherwise.
Doing some modifications in this area that will affect shear. Image attached.
The extra tie schedule notes #3 as the size and for spacing uses "Spacing EE" which I am guessing means each end. I had the following guesses:
- 6/5 means 6 ties @5", however they use the @ designation everywhere else for rebar spacing so I don't know why they'd mix it up here
- @6" for the first 5ft?
- 6/5 refers to left/right ends respectively, so 6 ties and 5 ties - but how many, spacing, over what length? Is it implied one extra between each basic shown in section?
There is a beam schedule for other beams in the building and it uses similar designations, i.e. under stirrups it will say "10/6 Bal @ 12". I have a full set of drawings including typical beam details and there is no explanation or abbreviations/symbols section - good set of drawings otherwise.
Doing some modifications in this area that will affect shear. Image attached.






RE: Older(er) Drawing Notation for Concrete Beam Ties
11 #3 ties @6" each end, #3 ties @ 12 in between.
Michael.
"Science adjusts its views based on what's observed. Faith is the denial of observation so that belief can be preserved." ~ Tim Minchin
RE: Older(er) Drawing Notation for Concrete Beam Ties
RE: Older(er) Drawing Notation for Concrete Beam Ties
Do you have access to the inside face or bottom of that spandrel beam? What would a metal detector, stud finder or compass needle, for that matter, show when it was scanned/moved over the #3 tie spacing on that face? Can you correlate some of these indications and spacings with the crazy notation?
RE: Older(er) Drawing Notation for Concrete Beam Ties
RE: Older(er) Drawing Notation for Concrete Beam Ties
I agree the schedule isn't clear, but it must mean 5 extra ties spread equally in the first five spaces. The tendency was to use even spacing and then split the differences because it made layout easier to eyeball. first the main spacing and then the added bars.
That drawing takes me back.
Michael.
"Science adjusts its views based on what's observed. Faith is the denial of observation so that belief can be preserved." ~ Tim Minchin
RE: Older(er) Drawing Notation for Concrete Beam Ties
RE: Older(er) Drawing Notation for Concrete Beam Ties