Hire the best Flooring Expert

Tips on joining bearers?

Results 1 to 9 of 9
  1. #1
    Apprentice (new member)
    Join Date
    May 2007
    Location
    Murrumbateman, NSW
    Posts
    4

    Default Tips on joining bearers?

    Hi guys

    Great resource you've got here. I'm building the foundations of a hut at the moment and am struggling to find a robust way to join my bearers over the stumps.

    The stumps I'm using are 90x90mm treated pine, with 190x45mm bearers sitting directly on top. Butt joints look like the simplest way to go, but I'm leery about only having 45mm of contact on each bearer. Wouldn't mind notching the posts and bolting the bearers on, but they're in the ground now.

    Any suggestions?

  2. #2
    1/16"
    Join Date
    Mar 2007
    Location
    Adelaide South Australia
    Posts
    108

    Default

    A half lap joint would be best with a nail plate both sides.

    I can't do diagrams on this (yet) so I can only describe it as a L on it's side.
    Don't force it, use a bigger hammer.

    Timber is what you use. Wood is what you burn.

  3. #3
    4K Club Member OBBob's Avatar
    Join Date
    Jan 2006
    Location
    Melbourne
    Posts
    7,077

    Default

    I agree with the Rat but in addition you'll find that even very large beams normally only have a spec of about 30mm bearing, so you should be fine. That said if it was mine I'd probably over engineer it and laminate another 190 x 45 over the joint.

  4. #4
    Senior Member MrFixIt's Avatar
    Join Date
    Mar 2004
    Location
    Carine WA
    Age
    72
    Posts
    186

    Default

    Quote Originally Posted by Downramp View Post
    Hi guys

    Great resource you've got here. I'm building the foundations of a hut at the moment and am struggling to find a robust way to join my bearers over the stumps.
    Any suggestions?
    Providing there is sufficient length in the bearers, if it were me, I would just bolt the bearers together above the stump. This will give each bearer a little more "support" and utilise the full size (top) of the stump.

    If you wanted a little more structual strength you could bolt these bearers togther through a steel plate (the type used when building pergolas) and bolt that plate to the stump.
    Kind Regards

    Peter

  5. #5
    Senior Member
    Join Date
    Jan 2006
    Location
    Melbourne
    Posts
    101

    Default

    Take a look at this thread

  6. #6
    A Member of the Holy Trinity echnidna's Avatar
    Join Date
    Feb 2003
    Location
    Timboon VIC AUSTRALIA
    Posts
    2,746

    Default

    Butting them is ok though you should gangnail them if you go that way ,
    I'd be inclined to overlap them and nail the joists together through the sides.
    Regards
    Bob Thomas

    ==================================
    Ebooks For Sale

    Doll House Book Shelf PLANS

  7. #7
    Senior Member MrFixIt's Avatar
    Join Date
    Mar 2004
    Location
    Carine WA
    Age
    72
    Posts
    186

    Default

    Hi
    Quote Originally Posted by Ben (TM) View Post
    Take a look at this thread
    Please note that the "SCARF" pdf file is the correct scarf joint. The other image shows a half lap joint done wertically.

    You can do your bearers either way, though a proper scarf joint in wide bearers is a pain to do and gains you nothing except a NICE looking joint!

    The scarf joint is done where the beams are in a "visual" position.

    Are you after "pretty" or do you want a functional bearer?

    Sure you could do a half lap joint either horizontal or vertical, but you gain nothing except additional work. Bolting the two bearers side to side on TOP of the stump is the easiest and strongest support you'll get with your current timber and (if necessary) you can also install ant caps.

    Otherwise notch out 45mm of the stump and use a vertical half lap joint on the bearers sitting in the notch.
    Kind Regards

    Peter

  8. #8
    Apprentice (new member)
    Join Date
    May 2007
    Location
    Murrumbateman, NSW
    Posts
    4

    Default

    Thanks for the feedback guys. The bearers aren't exposed, so I'm just going for functional - and a couple of butt joints with a steel overlap plate sounds like it'll do the job.

    Cheers

  9. #9
    Trailer bloke Yonnee's Avatar
    Join Date
    May 2007
    Location
    Tooradin, Vic.
    Age
    50
    Posts
    127

    Default

    I'm not to quick with computer pictures, so I'll try and describe what we (my builder mate & I) did with my own deck.

    I had the same delima in building my decking frame. The bearers are sitting on concrete stumps, but there's no reason why it wouldn't work for timber stumps. The problem I had was figuring out how to utilise the retaining spike in the stump without it being straight through the middle of a vertical cut. So the bearer's ends are cut at around a 22* angle, we then drilled a hole vertically through the cuts. The first bearer was placed over the spike, cut face up (this sat it on approximately 2/3 - 3/4 of the stump), the second bearer was then mated up (cut side down) to the first bearer and the spike hammered out over the side and down (the top of the second bearer was slotted to accomodate the spike). This only has the second bearer sitting on 1/4 - 1/3 of the stump, but it's also sitting on the angled cut of the first bearer. I also coach screwed plates to the side of each join.

    Hope this makes sense.

    Cheers.

Similar Threads

  1. Replies: 19
    Last Post: 6th Apr 2012, 05:03 PM
  2. Joining RHS Bearers
    By mullfitz in forum Structural Renovation
    Replies: 5
    Last Post: 26th Apr 2008, 10:05 PM
  3. Joining Bearers- the Sequel
    By Clive McF in forum Sub Flooring
    Replies: 1
    Last Post: 5th Dec 2006, 01:49 PM
  4. Joining Pipes
    By micko in forum Plumbing
    Replies: 1
    Last Post: 14th Jun 2005, 01:11 PM
  5. plate joining bearers mid span
    By capedcrusader in forum Sub Flooring
    Replies: 5
    Last Post: 16th Aug 2004, 08:31 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
  •