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Thread: Metric vs Imperial

  1. #1
    Early Adopter sbrown's Avatar
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    I need a quick lesson in Metric, tomorrow I will start a project in Metric with revit. I've never used the metric system so just some rules of thumb, ie a 3' door = what, stair rise over run 7/11 = what, 12" conc. wall = what. That kind of info. What is standard rounding?

    Thanks in advance.
    Scott D. Brown, AIA
    Senior Project Manager | Associate

    BECK

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    All AUGI, all the time Roger Evans's Avatar
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    Default Re: Metric vs Imperial

    Best to start in all millimetres ie rounded off 10ft= 3000mm = 3m

    1"=25mm
    2"=50mm
    3"=75mm
    4"= 100mm etc

    1ft = 300mm
    2ft = 600mm
    3ft = 900mm etc

    8x4 ply = 2.4x1.2 (still sold imperial)

    OK?? Need More??

    Mine's a 1/2 Litre thanks

    Roger

    PS Can you convert to & Use the metric template ?

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    AUGI Addict blads's Avatar
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    Default Re: Metric vs Imperial

    all you have to remember is that there is approx 300mm = 1 foot
    (actuall conversion is 25.4mm = 1 inch)

    ie a 3' door = what,
    900mm approx

    stair rise over run 7/11 = what
    I assume thats 7" riser: 11" going which is 1 : 1.57

    12" conc. wall = what
    300mm approx.

    hope this assists
    Cheers @blads
    Mac Geek | Building Design Suite 2020 | Semi-Retired Building Designer / CAD-BIM Trainer | Autodesk Certified Professional

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    Early Adopter sbrown's Avatar
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    Default Re: Metric vs Imperial

    Thats perfect, thank you.
    Scott D. Brown, AIA
    Senior Project Manager | Associate

    BECK

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    Revit Technical Specialist - Autodesk Scott D Davis's Avatar
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    Default Re: Metric vs Imperial

    Kooky Hairy Dogs Bite Decent Citizen's Mothers

    That's my Jr. High science teacher's saying for remembering the Metric Units:

    Kilo Hecto Deka Base(units) Deci Centi Milli

    Base is equal to 1 unit, everything to the right drops a decimal place, everything left gains a decimal place.

    1000=100=10=1M=.1=.01=.001

    I never forgot it, and now you wont either!

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    Super Moderator beegee's Avatar
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    Default Re: Metric vs Imperial

    Quote Originally Posted by sbrown
    What is standard rounding?
    Round (bankers) to the nearest millimeter.

    Also, the default module ( at least in these parts ) is 300 mm. ( 300, 600, 900, 1200, 1500, 1800, 2100, 2400 etc )

    Enjoy it !

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    Certifiable AUGI Addict Dimitri Harvalias's Avatar
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    Default Re: Metric vs Imperial

    Scott,
    A few suggestions from someone who had his early schooling in imperial, trained in metric, has worked using both and lives in a country that sells 4'x8' sheets of plywood in 13mm, 15mm and 19mm thicknesses!
    - Don't fuss with decimal places. Use the mm as your standard unit for everything.
    - In general there is no need to use hard conversions (eg calling up a 1" real world dimension as 25.4mm). I have never seen a framing contractor accurate enough to do rough carpentry down to 1/64th of an inch, although some of the recent threads regarding 'craftsmen' in MA might lead us to think otherwise.
    - For gridlines, major partition locations, ceiling heights etc. try to keep the numbers ending in 0's and 5' (is someone really going to notice a 1/4" difference in their bedroom?)
    - Once you have worked in metric you will never want to add up another dimension string in imperial (can you say fractions and common denominator?)
    - Always take comfort in the fact that if you get lost in the metric world all you have to do is go to the Settings menu and flip back to imperial to get your bearings. Revit is great that way and I use this feature a great deal. Still dealing with clients who are comfortable with imperial units and a building code/municipal authority which only thinks metric.

    Good luck and welcome to the 'rest of the world'

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    Revit Forum Manager Steve_Stafford's Avatar
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    Default Re: Metric vs Imperial

    Nice thread guys...thanks for the info!

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    Revit Guru gregcashen's Avatar
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    Default Re: Metric vs Imperial

    Second that! Almost makes me want to go Metric...

  10. #10
    I could stop if I wanted to MartyC's Avatar
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    Default Re: Metric vs Imperial

    Metric Rocks!

    In this part of the world everthing is metric in the graphic language but very often still Imperial in the spoken language, like, 'but how wide is that carpet at 3.6m', 'it's 12', just like it always was'. Down under a 2x4 is a 4x2, and 4'x8' sheet is 8'x4', sorta like driving on the correct side of the road.

    Generally though timber, steel, masonry, if detailed properly, is actual size rounded to 1mm.

    It really is eesy peesy!

    Cheers M

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