Was on a simple garage addition job site last week showing my 14 year old how 0.15?? prism offsets work and explaining to him how important it is to specify correctly, LEFT OR RIGHT.
Long story short, I was back onsite today correcting my 0.30?? mistake.
This is one big reason that in the last few years I have taken to using reflectorless to get shots on the face of a wall, then intersecting the wall lines to develop the corners.?ÿ The other is that I can get 10 such shots in the time it takes to shoot one building corner with a rod and an offset routine.?ÿ
What is the corner of the building?
the siding under the corner trim?
the corner trim?
the 3' high stone veneer that sticks out 8"?
the concrete foundation?
What is the corner of the building?
the siding under the corner trim?
the corner trim?
the 3' high stone veneer that sticks out 8"?
the concrete foundation?
It is whatever you measure to, of course. Just tell folks what it is on the map that you are showing. Depends on the purpose of the survey, in this area building setbacks are measured to foundation, so if an addition is being planned close to setback, it is best to get foundation. We draw sketches of all surveyed buildings with point numbers on them, and show where shots are taken, if a point is measured to siding, a detail is drawn with dimensions to foundation. We also strap all sides of building w/ a rag tape for a check and to draw corners that haven't been shot. If you're just documenting the rough position of a building on a site, then no one cares.?ÿ
What is the corner of the building?
the siding under the corner trim?
the corner trim?
the 3' high stone veneer that sticks out 8"?
the concrete foundation?
That's not the important question. The question is what is the purpose for making the ties, and what does that end require. Architects designing an addition generally want to know the face of the studs on the inside and the face of the sheathing (which usually corresponds to the foundation) on the outside.
If it is compliance with zoning those codes usually reference the foundation - a reasonable thickness of siding, etc. is allowed inside the setbacks. But it may be the eaves or cantilevers.?ÿ
If it's simply a boundary line encroachment matter then I suppose it's whatever sticks out the furthest.
Architects designing an addition generally want to know the face of the studs on the inside and the face of the sheathing (which usually corresponds to the foundation) on the outside.
In 1999 I provided a boundary and topo to a local architect, who designed a commercial building for the site.?ÿ Unbeknownst to me at the time, he set the edge of foundation right on one of the side lot lines.?ÿ Two years later the owner hired me to do an ALTA so he could refinance the project, and I had to show the siding over the line.?ÿ It was a pretty minor encroachment and apparently didn't hold up the loan, but I advised the architect to leave a little breathing room in the future.
Last year the adjoiner decided to sell and hired a surveyor (not me) to map the improvements.?ÿ He also showed the encroachment, and the owner of the commercial building ended up buying a 2-inch strip and paying for a lot line adjustment to accommodate the change.
Is it right from the instrument or the rover? Particularly when working with another person, ?ÿI believe the majority of mistakes is from this. Being old school, to me everything is relative to the direction of the?ÿinstrument. When I was running multiple crews, the use of a offset distance only offset was discouraged, due to field crews tying in property evidence, storm and sanitary features?ÿand other features that require more accuracy. It is a useful tool that should be used carefully.
A handy aid for locating buildings is a 60d nail as it is 0.5 feet long. ?ÿPlace it perpendicular to the wall face, take the shot, then offset the line in CAD that 0.5 feet. ?ÿKnowing which way is obvious.
Being old school, to me everything is relative to the direction of the instrument.
I started out that way when I began working robotic, but after a year or so of working exclusively solo I changed over to the rod view.?ÿ I agree that this can be a problem with multiple crews or when mixing robotic and non-robotic, but for my operation those conditions don't pertain.
Here's what I use for shooting building corners inside or outside corners creates a point 0.25' perpendicular to both building lines