Results 1 to 3 of 3
  1. #1
    Join Date
    Aug 2006

    Default New Shed - floor weight capacity question


    I am purchasing a Post Woodworking shed 12'x20'. I'm upgrading a few things, specifically the floor, to be able to store a car in the winter. Pouring a concrete foundation isn't an option at this point.

    The shed floor will be built with:
    1. 12" OC 2x6 PT Floor Joist
    2. Joist hangers
    3. Double 5/8" Exterior Grade Plywood Floor (stacked on top of each other)

    I'm wondering what the maximum weight this floor could handle? Thoughts?


  2. #2
    Platinum Member KennyG's Avatar
    Join Date
    Jan 2011
    SW Michigan
    John Deere 2320

    Default Re: New Shed - floor weight capacity question

    From an old beam table I have, a 12 foot span 2x6 will support 420 lbs (distributed load) at a Fiber stress of 1000 psi, which should be a reasonable value for pressure treated. With 21 joists, that would give you a total distributed capacity of 8820 lbs (neglecting any contribution from the plywood other than distributing the load). Given the point loads of the tires of a car and the need to consider some live load, I think you may be a little marginal on the design. I don't think it would be safe with less than 2x8 joists and, if I was doing it, I would go to 2x10 or 2x12. The cost won't be that much higher.

  3. #3
    Join Date
    Aug 2006

    Default Re: New Shed - floor weight capacity question

    Thanks KennyG, that helps. If I have a choice, I'll see if I can upgrade. I'd love to see how 1.25" of plywood stacked changes the distribution/load on the 2x6 though.

    Again, thanks for checking!

Similar Threads

  1. repairing shed floor
    By bigballer in forum Projects
    Replies: 5
    Last Post: 09-03-2012, 09:35 PM
  2. JD 2320 in my shed, will floor support it?
    By sbussell in forum Projects
    Replies: 3
    Last Post: 04-18-2011, 03:36 PM
  3. Shed floor strength opinion
    By fred46 in forum Projects
    Replies: 6
    Last Post: 09-13-2010, 09:38 AM
  4. Wood floor in a shed
    By valleydweller1 in forum Projects
    Replies: 14
    Last Post: 04-16-2006, 11:19 AM
  5. Replies: 15
    Last Post: 10-28-2005, 11:43 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
© 2013 TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.