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Related Articles


As Built drawings

As Built drawings

As Built drawings

Hello everyone.
I am working on a summer internship and one of my first projects is to draw a septic line system as built. The current drawing has incorrect measurements and piping layout is also incorrect. Sometime it represents a 90 degree turn, when its actually only a 45 degree. I have attached to this question a document that has old drawings and some current ones. The drawings with the yellow marks seems to be all old and incorrect. The other more detailed drawings are almost all correct. I have written some measurements I took manually in the drawings with the yellow mark. With all the information on had how do I go about updating the drawings? Do I just make marks on the drawings? I don’t need to actually draw it in AutoCAD. I will be sending all the information I have to a design specialist, but I do need to provide all the right information for the drawing to be update. How do I do that? Thank you for your time. Any help or ideas is very much appreciated.

RE: As Built drawings

All the piping connections made my head hurt... I don't think I've seen a septic system with so much piping.

Have you located the lateral lines, length, size, and general construction of the bed?

You need to check the interior/use of the structure to determine the effluent outflow... number of fixture units or whatever; this should be identified on the drawing. You also have to have a look at the soil type and a rough idea of the flow of liquid through the soil (percolation test).


RE: As Built drawings

Hi Dik,

Thank you for your reply. All I need to do is just change the current drawings to as built. I do have all the lateral lines, and what not. I was wondering what would be the best way to approach a as built drawings.

RE: As Built drawings

Put your as-built corrections in clouds and mark with revision number. List the revision "as-built" and date in the title block.

RE: As Built drawings

With a big disclaimer...

RE: As Built drawings

Hand mark the changes as you did on the drawings. Instead of the "yellow" highlights, a mark-up color codes are normally used for the field as-built sketches on the drawings of the installed system as bellow:

Red mark - for the changes, including the routing, dimensions, etc.
green mark - for the deletions
yellow mark - as designed without a change
blue mark - for the note to the CAD designers

Take some photos of the final installation which are always very helpful for the designer in the office in additional to the mark-ups.

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