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I have started planning out my deck build in my backyard.
Looking for advice if it safe to fix bearers sitting on a post on one side then directly fixed to slab on the other using 145x45? Looks like there is a 145 joist bracket I can use to fix or is there another preferred method when attaching bearers to concrete,
I have attached a rough plan
RED- posts are 1.5 apart 100x100 h7 Cyprus
GREEN - bearers 145x45 post to slab
BLUE - Joists 45x90. 450 centre to centre
YELLOW floor board
Welcome to the Bunnings Workshop community @kristian1982. It's terrific to have you join us, and many thanks for your question about constructing a deck.
Yes, you could attach a ledger plate to the slab. You would install flashing and then bolt the ledger directly to the slab with Dynabolts.
Your plan looks quite good, but remember you'll need posts supporting the middle two bearers as well.
You might like to check out this helpful guide: How to build a deck boardwalk.
Please let me know if you have any questions.
Mitchell
Thanks Mitchell for the feedback.
I will check out the link.
So a ledger right along the slab to support the bearers from the post side is better?
does it have to be spanning the length of the boardwalk or just dynabolt pieces to support each bearer?
So you advise more posts for the middle 2 bearers? The length of the bearer is 1.5. That span from post to ledger shouldn’t need another post should it? I could Throw in a tough block it’s low enough.
Can you tell me more about the flashing? Is this just a tape onto and behind the ledger? What tape do you recommend?
posts in today image updated
It's an option, which is likely more convenient than have to install another set of posts along the wall @kristian1982. Typically it is done with a single board, but I suppose you could to it with individual sections.
Sorry, my mistake. The bearers spanning the 1500mm are fine.
For the flashing, use something like CAgroup 300mm x 30m x 500um Plascourse. It goes behind the ledger to stop water transferring from the deck through to the slab. It's essential when connecting a ledger to brickwork and just a bit of a safety precaution when connecting to a slab.
Mitchell
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