“Tape measures don’t lie, PDFs do”

  • “Tape measures don’t lie, PDFs do”

    Posted by David Cutler on August 13, 2025 at 7:53 am

    My Daughter dropped this gem last night chatting about her day at work – she is a newly minted Associate Project Engineer with a contractor on a very large tenant fit out project. Basically she had spent the day looking for missing dimensions in the plans and writing RFI’s to request the missing information. Discussing further she indicated that the company has had issues with incorrect scales in PDFs producing incorrect dimensions so they always submit RFI’s to fill in the gaps in the information.

    So, do you trust scaled dimensions on plans? Do you “Trust but verify”, or do you just write the RFI?

    Thinking this might be a good title for a future Unbound session….🙂

    David Cutler replied 3 weeks ago 5 Members · 8 Replies
  • 8 Replies
  • Troy DeGroot

    Organizer
    August 13, 2025 at 10:05 am
    Points: 26,297
    Rank: UC2 Brainery Advanced Brown Belt UC2 Brainery Advanced Advanced Brown Belt Rank

    Sounds like she is gaining valuable experience on a large project, good for her.

    It depends on where the drawings came from and who produced them. Back in the manual drafting days, you could write whatever dimension you wanted between the extension lines. It didn’t always matter if it was to scale. That carried into 2D CAD programs as well, where you could override the dimension value. In a 3D BIM world, the rule is to model everything exactly how it should be built, so dimensions are accurate. You’re also not able to override dimensions anymore.

    At the end of the day, it depends on the tools used and the quality of the work.

  • Doug McLean

    Member
    August 13, 2025 at 10:11 am
    Points: 17,120
    Rank: UC2 Brainery Advanced Blue Belt II UC2 Brainery Advanced Blue Belt II

    Sort of on this topic, check out a post I shared this morning on LinkedIn.

    This is pretty cool and could really cut down on a huge process in the field

    and Dave, always trust but verify. I’ve had quite a few scales wrong, some of which by my own doing…lol

    • David Cutler

      Member
      August 13, 2025 at 3:46 pm
      Points: 29,935
      Rank: UC2 Brainery Advanced Brown Belt II UC2 Brainery Advanced Brown Belt II

      I saw that this morning @Doug McLean ! Very slick.

      Did you notice at the end of the clip that his 48 3/8″ measurement had changed to 17 11/16″?

      I also wonder about how well it “transfers” to Revu – certainly appeared that he was typing the value into Revu rather than it automatically populating – but I could be wrong.

      Maybe there will be a product rep at Unbound… 🙂

  • Vince

    Member
    August 14, 2025 at 1:23 am
    Points: 15,219
    Rank: UC2 Brainery Advanced Blue Belt UC2 Brainery Advanced Blue Belt Rank

    Always verify a drawing.
    This week I’ve had a set drawings with the wrong scale in the title blocks and wrong scale bars in the legend.
    The to top it off, when I tried to stitch the 6 drawings together the first one wasn’t printed to the same scale as the others – I had to increase it to 103% to get everything to tie together.

    • David Cutler

      Member
      August 14, 2025 at 7:25 am
      Points: 29,935
      Rank: UC2 Brainery Advanced Brown Belt II UC2 Brainery Advanced Brown Belt II

      That’s frustrating @Vince

      Have you heard about my hack for combining information from sheets with different scales?

      It adds a couple of steps, but it saves you from having to manually stretch the image.

      The process is pretty simple:

      1. Set the scale of the page that you are copying from and the page that you are pasting to

      2. Create a scaled toolbox and establish the scale to match the source sheet

      3. Snip the image that you need using Revu’s “G” or “Shift-G” snipping tools

      4. Paste the image onto the source sheet then right click on the image and save the image as a tool to your scaled toolbox that matches the source sheet scale. Deleted the image from the sheet.

      5. Select the image from your scaled toolbox and paste it where needed. Revu will automatically scale the image to match the sheet that you are applying the markup to – no stretching required!

      This also works great for overlaying proposed linework over existing linework when the sheets are at different scales.

      Bonus hack – I have scaled toolboxes pre-established for the common scales that I work with – 1 Inch = 10 Foot, 1 Inch = 20 Foot, etc along with a “Temporary Scale” that I adjust as needed for the odd cases.

      • Vince

        Member
        August 15, 2025 at 1:18 am
        Points: 15,219
        Rank: UC2 Brainery Advanced Blue Belt UC2 Brainery Advanced Blue Belt Rank

        I do use scaled Toolboxes for similar things @DavidCutler but not for this actual scenario – I’ll give it a try next time – thank you!

      • Isaac Harned

        Member
        August 15, 2025 at 8:56 am
        Points: 8,708
        Rank: UC2 Brainery Purple Belt III UC2 Brainery Purple Belt III

        This is actually really cool, I’m going to have to try this one as well.

        • David Cutler

          Member
          August 15, 2025 at 11:02 am
          Points: 29,935
          Rank: UC2 Brainery Advanced Brown Belt II UC2 Brainery Advanced Brown Belt II

          This workflow for me came directly from a “I wonder if I could…” moment after learning about scaled toolboxes. As a number of us like to say “I didn’t know what I didn’t know” on scaled toolboxes…

Log in to reply.