What is this exactly?

I read the lath as "7 feet off the face of curb at the centerline of the handicap ramp"

Looks like point numbers maybe somehow corresponds to a cut sheet

Makes me think of a Who song. Who are you, who who, who who, I really want to know!

Went back today to see if I could find any more examples and found brand-new 60D's and Laths that were not there 2 days ago. I would like to see who the other consulting group is who is installing these to get a better idea of how the surveys are laid out throughout the site. From what I can tell, there are multiple different types of marks, like this grade marking (identified by the 0+66 in the second photo)

Looks like typical construction stakeout. Although their methods of marking are very basic... Have never seen anyone write vertically on a stake. My first boss would have ripped my stakes out for doing that! 0+66= BL or CL station. They must be using points vs alignments as everything is referenced to a stakeout # for cutsheets or restaking purposes.

We normally circle the offset numbers to distinguish them as opposed to using the prime mark, as it could be confused with 13.1 feet to der hub instead. Different strokes for different folks, I reckon-

The symbol on the lath (circle with x) is a mathematical direction arrow. If written on paper, it would mean directly down (into the page) and a dot in a circle means directly up (or out of the page).

Personally I always ask the person doing the work what is the best way or what is the norm for layout and markings, so that I can leave points and mark them in a way they will be understood by all. Seems that there are multiple ways of marking everything, and marking what is the norm for one guy will only get you laughed at on another. These points aren't labelled in a way that I am familiar with as I have really only seen offsets labeled with "O/S" even w/ paint on pavement. If I came across points labelled like this, I would have to assume there were #'s that correspond to the set of plans, or as stated above a cut sheet to be provided after the stakeout was complete.

summerprophet, post: 450255, member: 8874 wrote: The symbol on the lath (circle with x) is a mathematical direction arrow. If written on paper, it would mean directly down (into the page) and a dot in a circle means directly up (or out of the page).

I have seen and used that symbol to mean "offset." Pretty common here in the NY-NJ area.

Ken

Symbol code for gender.

joabmc, post: 450253, member: 10395 wrote: Looks like typical construction stakeout. Although their methods of marking are very basic... Have never seen anyone write vertically on a stake. My first boss would have ripped my stakes out for doing that! 0+66= BL or CL station. They must be using points vs alignments as everything is referenced to a stakeout # for cutsheets or restaking purposes.

Writing on a stake must be a regional thing, that's the only way I seen stakes written in my area.

RobertMS- Do you mind if I ask what you are trying to do out there? Are you simply trying to gain knowledge about a survey, or does it directly pertain to your task? My first post was a little ambiguous, in that, most who have been on field see this type of thing routinely, but unless affects what you're doing, is standard.
The ways people stake things out will always vary between chiefs. surveyors, crews, etc. If you are trying to gain more knowledge, do you have a good line of communication with the LS you're working under? I assume you are working under a Licensed Surveyor, correct? If not, there are multiple issues here.
That person (LS) can be of great help. Working along side some seasoned construction survey crews is the fastest way to learn.

Brian McEachern, post: 450260, member: 9299 wrote: Personally I always ask the person doing the work what is the best way or what is the norm for layout and markings, so that I can leave points and mark them in a way they will be understood by all. Seems that there are multiple ways of marking everything, and marking what is the norm for one guy will only get you laughed at on another. These points aren't labelled in a way that I am familiar with as I have really only seen offsets labeled with "O/S" even w/ paint on pavement. If I came across points labelled like this, I would have to assume there were #'s that correspond to the set of plans, or as stated above a cut sheet to be provided after the stakeout was complete.

They are doing site work (storm drainage, water, sewer, etc) in prep for a development that contains 4 5-story residential apartments, shops and a parking garage and warehouse. I will see if I can contact the contractor to find out the other surveyor.

Survey Chad, post: 450287, member: 12063 wrote: RobertMS- Do you mind if I ask what you are trying to do out there? Are you simply trying to gain knowledge about a survey, or does it directly pertain to your task? My first post was a little ambiguous, in that, most who have been on field see this type of thing routinely, but unless affects what you're doing, is standard.
The ways people stake things out will always vary between chiefs. surveyors, crews, etc. If you are trying to gain more knowledge, do you have a good line of communication with the LS you're working under? I assume you are working under a Licensed Surveyor, correct? If not, there are multiple issues here.
That person (LS) can be of great help. Working along side some seasoned construction survey crews is the fastest way to learn.

I have learned much from working under the LS, but I was kind of confused with the type of marking that this was because I had never seen one before, and I wasn't sure if it affected the survey I did (or vice versa, since new ones were set after I was there) I am going to work with the contractor to see who set these other marks.

The marks set by a surveyor is only one part of the information being conveyed. The survey notes /cut sheets, plans, shop drawings, conversations and other incidentals complete the communication string. Do not try to decipher without all the information is my never to be humble opinion. Jp

Thanks for the info. I also updated my profile pic to my Leica Total Station on a tripod during a survey. I actually found out that the surveyor that marked these is a local surveying company that consults for new construction. They mentioned that the marks are not in conflict with each other and my survey most likely does not need to be redone.