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Scales Right?

  • 22-07-2018 4:53pm
    #1
    imalwayshappy
    Registered Users, Registered Users 2 Posts: 121 ✭✭


    Hi All,

    I wonder if anyone can help me with the attached pictures. I received construction drawings in pdf format. When I look at the measurements in PDF they seem to be off. I have attached the screenshot. Anyone have any ideas? I appear to have the scales right (I think)

    Many Thanks


Comments

  • #2
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    What is the purpose of the drawing? Is it a ‘sketch’ or for planning? Or construction?
    Is there any caveats/ written text referring to scaling the drawing?


  • #3
    imalwayshappy
    Registered Users, Registered Users 2 Posts: 121 ✭✭imalwayshappy


    BryanF wrote: »
    What is the purpose of the drawing? Is it a ‘sketch’ or for planning? Or construction?
    Is there any caveats/ written text referring to scaling the drawing?

    Hi there

    No there is nothing other than the scale attached no other references etc.. Its a plan for an extension that our architect drew up. Builders are pricing off it etc. Thanks


  • #4
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Don’t worry about it


  • #5
    imalwayshappy
    Registered Users, Registered Users 2 Posts: 121 ✭✭imalwayshappy


    BryanF wrote: »
    Don’t worry about it

    Grand thanks I am just more so wondering as I am putting in furniture and wanted to measure the length and width of a sofa etc to see if it fits. Any ideas of how to adjust the scale in pdf? I don't want to be planning with incorrect measurements.

    Thanks


  • #6
    Stanford
    Registered Users, Registered Users 2 Posts: 1,194 ✭✭✭Stanford


    A PDF will always distort a scale as it is a scan, to be sure can whoever drew up the drawings to send you original (not photocopies)


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  • #7
    Stanford
    Registered Users, Registered Users 2 Posts: 1,194 ✭✭✭Stanford


    You can't accurately adjust the scale of a pdf as it is essentially a snapshot and any adjustment will distort the true measurement, issue original drawings only, if the contractor is using a QS they will measure sq.m or linear meters so it is up to you to ensure drawings are accurate especially if they contain a scale as yours does.


  • #8
    imalwayshappy
    Registered Users, Registered Users 2 Posts: 121 ✭✭imalwayshappy


    Perfect appreciate the input

    Kind Regards


  • #9
    Nickla
    Registered Users, Registered Users 2 Posts: 131 ✭✭Nickla


    you should be able to get more accurate measurements even on a pdf. its possible that whoever converted the drawings didn't convert them to scale - you could ask them to resend it to scale.


  • #10
    Gumbo
    Moderators, Society & Culture Moderators Posts: 40,351 Mod ✭✭✭✭Gumbo


    imalwayshappy wrote: »
    Grand thanks I am just more so wondering as I am putting in furniture and wanted to measure the length and width of a sofa etc to see if it fits. Any ideas of how to adjust the scale in pdf? I don't want to be planning with incorrect measurements.

    Thanks

    Worry about the furniture when the walls are in place.
    Never buy furniture based off dimensions on drawings.


  • #11
    Gumbo
    Moderators, Society & Culture Moderators Posts: 40,351 Mod ✭✭✭✭Gumbo


    Stanford wrote: »
    A PDF will always distort a scale as it is a scan, to be sure can whoever drew up the drawings to send you original (not photocopies)
    Stanford wrote: »
    You can't accurately adjust the scale of a pdf as it is essentially a snapshot and any adjustment will distort the true measurement, issue original drawings only, if the contractor is using a QS they will measure sq.m or linear meters so it is up to you to ensure drawings are accurate especially if they contain a scale as yours does.

    Just to add, this is incorrect information.
    You can print the cad file directly to PDF and the scale remains absolute perfect.

    This is how we can lodge planning applications online here in Dublin.
    You set the scale in PDF Pro based on what it was drawn at, and it should scale perfect.

    OP if you want to email me the PDF in confidence I will check it and see if it’s actually to scale or possible just drawn to visually look right with the correct dimension marked for true purposes


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  • #12
    Tefral
    Registered Users, Registered Users 2 Posts: 4,396 ✭✭✭Tefral


    Stanford wrote: »
    You can't accurately adjust the scale of a pdf as it is essentially a snapshot and any adjustment will distort the true measurement, issue original drawings only, if the contractor is using a QS they will measure sq.m or linear meters so it is up to you to ensure drawings are accurate especially if they contain a scale as yours does.

    Firstly any decent QS wouldn't trust the information given. First thing we are all trained to do is check the scale on a drawing and if you don't it's a mistake you only make once.

    Secondly we normally use a programme called Cubit or CostX for measurement and we adjust the scale based on a figured dimension.

    Also it's worth reiterating the point made above, don't buy furniture till the walls are up. Site measurements nearly always differ due to fitting things in on site. These things you can't get on a drawing unless they are exceptionally detailed.


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