Hire the best Decking Expert

Low level deck

Results 1 to 14 of 14
  1. #1
    Apprentice (new member)
    Join Date
    Sep 2021
    Location
    Brisbane
    Posts
    5

    Default Low level deck

    Hi All
    First time posting.
    I know there are a lot of posts about decks (incl low level) and what span to use for bearers and joists but I'm struggling to work out if I'm on the right track given there's soooo much information on here.
    I've built a deck before but this one is quite low level so I'm looking at the following
    Deck will be almost 9m X 3.2m. Per the picture, I was going to use H3/F7 pine - 90X45. For the bearers, I was going to double them up. 3 gal stirrups per 3m or 3.3m length. I was then going to use joist hangers (as I don't have the clearance to run them over the top of the bearers) every 450mm.
    My questions are
    * Do I need to run 4 lengths of bearers (per the 3.2m). One every 1.07m or could I get away with 3 lengths - one every 1.6m. (second pic) I'm guessing this is too far.
    * Alternatively, if I ran the 4 bearers, could I get away with single widths? Or is it better to over engineer and stick with the double widths?

    Thanks for any advice or suggestions
    Cheers
    Chris
    Attached Thumbnails Attached Thumbnails deck-plan.jpg   deck-plan-2.jpg  

  2. #2
    Golden Member havabeer's Avatar
    Join Date
    Nov 2011
    Location
    nsw
    Posts
    913

    Default

    how low is this low deck?

    why not just use gal box sections and just screw the decking straight to them.... no rot, no warping. use composite decking and you'll never have to do maintenance on it ever again.

    so lay the gal box vertically and screw the decking horizontally.
    Remember if you don't sin, then Jesus died for nothing

  3. #3
    Apprentice (new member)
    Join Date
    Sep 2021
    Location
    Brisbane
    Posts
    5

    Default

    Thanks for the reply. At the lowest point, I've got around 120cm clearance. Hadn't thought about using gal so might look into it. Cheers

  4. #4
    Golden Member havabeer's Avatar
    Join Date
    Nov 2011
    Location
    nsw
    Posts
    913

    Default

    i wouldn't call 1.2m a low deck, its high enough you legally have to have a hand rail around it to stop people falling off in most councils.
    Remember if you don't sin, then Jesus died for nothing

  5. #5
    Apprentice (new member)
    Join Date
    Sep 2021
    Location
    Brisbane
    Posts
    5

    Default

    Sorry, meant to say 120mm, not cm

  6. #6
    4K Club Member Marc's Avatar
    Join Date
    Jul 2003
    Location
    Sydney
    Posts
    13,749

    Default

    Clearance under the bearer 120mm? ... and then you want to hang the joist, so the deck boards will be as close to the dirt as 210mm?
    Unless you can dig out a substantial amount of dirt and design proper drainage, I suggest to forget the idea and pave or concrete the area.

    Steel and plastic alternative as per Havawine ... I mean beer ... sure. Some say the last generation of fake ... err plastic decks is way better than the first ones. May well be true.
    Science is never settled,
    it advances one funeral at the time.
    Max Planck

  7. #7
    2K Club Member
    Join Date
    Apr 2012
    Location
    Jarrahdale
    Posts
    2,022

    Default

    Hey CB,
    Do yourself a favour and go to https://www.blocklayer.com/deckcalculator.aspx
    Entering the costs for the materials calculates automatically and then doing spacings etc. is super easy
    Don't forget to donate too...
    And.....your point is.....what exactly?

  8. #8
    Golden Member havabeer's Avatar
    Join Date
    Nov 2011
    Location
    nsw
    Posts
    913

    Default

    yeah i'd almost go with marc's suggestion and just concrete it.

    at least all you have to do is just give it a hose every now and then, we considered doing a deck as well but ended up going with coloured and sealed concrete. this is ours which is 8 x 5m.

    the costs where roughly the same back then, but just a ton less effort to do the slab and now pretty much zero maintenance.




    Remember if you don't sin, then Jesus died for nothing

  9. #9
    Apprentice (new member)
    Join Date
    Sep 2021
    Location
    Brisbane
    Posts
    5

    Default

    Thanks David. Will take a look. Cheers

  10. #10
    4K Club Member Marc's Avatar
    Join Date
    Jul 2003
    Location
    Sydney
    Posts
    13,749

    Default

    Your corner of the woods looks first class HaB
    Science is never settled,
    it advances one funeral at the time.
    Max Planck

  11. #11
    Old Chippy 6K
    Join Date
    Mar 2007
    Location
    Canberra
    Age
    70
    Posts
    6,571

    Default

    Pavers or concrete easier, but if you want the timber deck try the TuffBlock system. https://buildtuff.com.au and https://buildtuff.com.au/products/tuffblock-12-pack

    I've done three decks this way now and like the ease of install (no holes, no concrete) and it gives solid deck. If there is to be a pergola then you'd need holes & posts etc, but for a low deck the system works well.
    Advice from me on this forum is general and for guidance based on information given by the member posing the question. Not to be used in place of professional advice from people appropriately qualified in the relevant field. All structural work must be approved and constructed to the BCA or other relevant standards by suitably licensed persons. The person doing the work and reading my advice accepts responsibility for ensuring the work done accords with the applicable law.

  12. #12
    Apprentice (new member)
    Join Date
    Sep 2021
    Location
    Brisbane
    Posts
    5

    Default

    Thanks Bloss. I was looking at the Tuff Blocks (and still might use them in a couple of areas) but was worried the area would need a fair bit of work to either compact the soil or I'd need to use a base layer to stabilise them anyway. You obviously haven't had any issues with them noving or sinking slightly?
    Cheers

  13. #13
    Old Chippy 6K
    Join Date
    Mar 2007
    Location
    Canberra
    Age
    70
    Posts
    6,571

    Default

    Quote Originally Posted by cb2710 View Post
    Thanks Bloss. I was looking at the Tuff Blocks (and still might use them in a couple of areas) but was worried the area would need a fair bit of work to either compact the soil or I'd need to use a base layer to stabilise them anyway. You obviously haven't had any issues with them moving or sinking slightly?
    Cheers
    No - removed grass and onto original well compacted heavy soil. No movement at all. I followed my usual principal of closing up spaces - the minimal spans are the worst you are allowed to use and stay within legal requirements - that's not best practice IMO. That makes all decks more solid - I hate bouncy decks.

    But even if you need to compact the area it saves a huge amount of time.
    Advice from me on this forum is general and for guidance based on information given by the member posing the question. Not to be used in place of professional advice from people appropriately qualified in the relevant field. All structural work must be approved and constructed to the BCA or other relevant standards by suitably licensed persons. The person doing the work and reading my advice accepts responsibility for ensuring the work done accords with the applicable law.

  14. #14
    Golden Member
    Join Date
    Oct 2017
    Location
    Melbourne - Yarra Ranges
    Posts
    629

    Default

    Quote Originally Posted by Bloss View Post
    But even if you need to compact the area it saves a huge amount of time.

    ...for the OP's benefit, assume you mean potentially compacting with one of these. These are a quick and easy way to get good compaction.
    https://www.kennards.com.au/plate-compactor-60kg.html

Similar Threads

  1. Replies: 8
    Last Post: 9th Oct 2017, 07:16 AM
  2. Low level deck
    By zener1960 in forum Decking
    Replies: 0
    Last Post: 20th Apr 2015, 05:22 PM
  3. Replies: 60
    Last Post: 17th Oct 2011, 10:24 AM
  4. Low Level deck
    By ndmand in forum Decking
    Replies: 7
    Last Post: 2nd Sep 2011, 05:22 PM
  5. Low Level Deck
    By nesbit in forum Decking
    Replies: 2
    Last Post: 10th Jan 2008, 02:20 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
  •