Activity Feed › Discussion Forums › Strictly Surveying › ID. or O.D.
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Jim in AZ, post: 416098, member: 249 wrote: Haven’t we discussed this before?
Yes. And flagging color is next.
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thebionicman, post: 416067, member: 8136 wrote: As long as you dont end the description with ‘N30 23 12W, 0.21 feet from true corner’ we’ll probably get along well…
Bionicman’s dimension point is s14d 15’w 0.15′ from the true corner.
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ppm, post: 416058, member: 6808 wrote: When you call out an Iron Pipe, do you call it as inside diameter (ID) or outside (OD)?
In my neck of the woods we don’t use pipes anymore, but find them all the time. I know when I worked in California, we found pipes all the time. Sometimes even with a YPC inside it. Anyway… I had always in the past thought that a surveyor should measure outside diameter of an Iron Pipe, but I am coming around to saying that it should be inside (largely because that is how it is measured at the hardware store). I guess it should always be stated, at this point but what is your standards at your office?I call them what the guy before me called them, I’ve frequently misidentified them by 1/4″, typically I like to use the area of occupation, after all we ain’t plumbers. 🙂
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Dave Karoly, post: 416123, member: 94 wrote: Bionicman’s dimension point is s14d 15’w 0.15′ from the true corner.
Thats my trademark. Minutes and half tenths;^)
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We ain’t plummers….
Well, would you trust a guy, who can’t measure a nominal pipe size, to measure your property? -
BK9196, post: 416125, member: 12217 wrote: I call them what the guy before me called them, I’ve frequently misidentified them by 1/4″, typically I like to use the area of occupation, after all we ain’t plumbers. 🙂
OD or ID – if I find a corner that was identified as a “1/2-inch SIP” on the original survey plat, but the original surveyor measured OD instead of ID, I sure as heck will NOT try to “One Up” the original surveyor by correcting his corner dimension to an ID. IMHO, doing so is nearly the equivalent of setting a corner next to his, pin cushioning. I will note and label it “1/2-inch EIP”. Then the guy behind me, as well as myself, know the corner that I found was the original corner. My $0.02.
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If i find a 1/2″ od pipe, and call it such, there is no problem.
If i find a 7/16″ id pipe, and call it such, there is no problem.
If the guy I’m retracing set 1/2″ od pipes, but simply called them “set 1/2″ pipe”,
I’m going to call them, “Fd. 1/2″ od pipe, as set by Leroy Turkeysnot, PLS No. 7, in 1963”
You are not “one upping” him. You are being descriptive, orderly, and leaving a good set of footprints. -
I know measuring the ID is the way pipe is measured in the hardware store, but in the soils around here, any pipe driven into the ground will have the top of it so deformed and mushroomed out that accurately measuring the ID would require cutting off the top inch or so of the pipe. In those cases, I carry a small set of calipers, and list the size of the pipe, “measured OD”, and any markings found on the pipe, because it is all I have to measure.
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I might even add: 5″ subsurface, 1′ south to cedar fnc corner, E, W, S.
You, and I are surveyors. It’s what we do.
We are not “estimators”, “guessers”, and such.
We measure stuff.
Kind of like the question, “where does it say you have to be a boy, to join Boy Scouts of America?”
Answer:
It’s in the NAME. “BOY” Scouts.
We likewise are SURVEYORS. With licenses. We SURVEY stuff. Not guess at it.
Ok?
If it’s a poor measurement, we might put “more or less”.
Like this “…thence with said C/L of East Branch, to Crooked Creek, northerly, 500′, more or less, to the centerline of County Rd. No. 53;
So, you might put, “found 1/2″ pipe, more or less”, but it looks dumb. So, you don’t do that.
It seems to indicate that you failed to look, and consider the monument’s size.
That’s just sloppy, to pretend. If you say something, it should be true. Don’t fake it.
You know… Be a surveyor!
With no qualifier, its assumed to be id.
But, I have no problem using od…just say so. -
Peter Ehlert, post: 416074, member: 60 wrote: as far as I know all pipes and tubes are known by their ID… the OD is a function of the wall thickness.
unfortunately some surveyors don’t know that and misidentify.what is the world is a YPC?
Unfortunately MOST surveyors apparently don’t know this.
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imaudigger, post: 416183, member: 7286 wrote: Unfortunately MOST surveyors apparently don’t know this.
Actually I think quite the opposite is true. If the law specified common size versus ‘least dimension’ we would probably use it…
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thebionicman, post: 416206, member: 8136 wrote: Actually I think quite the opposite is true. If the law specified common size versus ‘least dimension’ we would probably use it…
What law are you referring to?
A size 1″ Schedule 40 steel pipe (common size) measures pretty close to 1″ I.D.
Many surveyors would call this out as “Fnd. 1-1/4″ I.P” -
In this County we all use ID, it never gets called out on maps and there isn’t any problem. In the neighboring county, where they primarily set rebar, it tends to get mixed up more so it’s usually noted on maps. A confusing thing can be that the outside diameter of a 1/2″ pipe is about 3/4″
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I say measure them and put what you find if you can’t measure ID that’s okay measure outside diameter we’re good.
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Roger, Nice to see surveyors in an area agree to something 🙂
Nate, I agree…. In areas where there is no standard of practice, it should be called out.
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One of these days, I’m gonna put “found 19/39” rebar, (its rusted a little!).
Just for the emtertainment of some future surveyor… -
Found some 9/16 inch bars recently, as well as some 3/8 inch pipe. Different jobs but the same surveyor. That’s what he said they were so that’s what I reported I found. At another corner the record indicated 1/2″ pipe. Within 0.05 of the calculated position we found a 1/2″ pipe with an elbow screwed on it. That was weird!
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ppm, post: 416248, member: 6808 wrote: Nate, I agree…. In areas where there is no standard of practice, it should be called out.
OK, but not on every single instance, please. Just put a note in the legend that pipe diameters refer to nominal inside diameters.
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Peter Ehlert, post: 416074, member: 60 wrote: as far as I know all pipes and tubes are known by their ID… the OD is a function of the wall thickness.
unfortunately some surveyors don’t know that and misidentify.Actually, that’s not quite correct. Pipe is typically called out as the nominal I.D. Tubing is always called out as O.D. with a wall thickness. This is particularly true in the machining business where D.O.M. (Drawn Over Mandrel) tubing is used a lot. Copper, Steel, Plastic tubing is always O.D. with a wall thickness.
But in my opinion, as soon as you drive any of it into the ground for the intended purpose of making it a monument, it’s no longer relevant to identify it as anything but a monument with (as Nate points out), its physical properties (the easiest to measure and subsequently identify being it’s O.D.).
Its ALL “pipe” once it’s in the ground…even if it’s tubing.:D
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Does it really make that much of a difference whether it’s inside or outside diameter when the corner is marked with 8″ well casing pipe sticking up 5′? Yes. I had one of those last summer. The original plat called for a hub and tack.
Willy
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