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  1. #1
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    Need help on measurements for 31MB

    Please help. We have our 2021 31MB ordered, but currently thinking of a mod for the bunk. What is the height of the bottom bunk frame? Thank you in advance!

  2. #2
    Site Team WhittleBurner's Avatar
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    Guess no one knows ??? A call to Grand Design Customer service may get you the answer, but patience may be required with all the units being sold these days.
    Marcy & Gary
    2014 Grand Design - Reflection 303RLS
    2022 GMC 3500 Denali Duramax Longbed SRW
    2015 GMC Denali 3500 - Retired
    2003 F350 - retired
    Michigan
    We're in trouble now, the dog are bloggin'!
    https://3dogsandatrailer.wordpress.com/


  3. #3
    Left The Driveway
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    The lower bunk was not structured very well on my unit. Suggest you pull the plywood and inspect before you mod. Link to my post. https://www.mygrandrv.com/forum/show...232#post326232

  4. #4
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    Quote Originally Posted by laurenross1213 View Post
    Please help. We have our 2021 31MB ordered, but currently thinking of a mod for the bunk. What is the height of the bottom bunk frame? Thank you in advance!
    were you able to find them? I need also lol

  5. #5
    Left The Driveway
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    11.5 inches from floor to bed deck, face frame is 1 inch taller.

  6. #6
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    Quote Originally Posted by usafrtr View Post
    11.5 inches from floor to bed deck, face frame is 1 inch taller.
    Thank you Do you know depth of bed that pulls out? Are the legs 4x4s

  7. #7
    Left The Driveway
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    Bed measurements are 72 in by 44 in. The supports I added are 2x4. The factory structure is 1x1.

  8. #8
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    Thank your sorry to be annoying did you do the harbor freight casters as well if so how did you mount or did you join the 2x4s?

  9. #9
    Left The Driveway
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    The bed is fixed, l only reenforced the structure.

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