Making box steps out of 4x8 PT, how many lag bolts?

Discussion in 'Decks & Patios' started by drumz, Nov 9, 2018.

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  1. Nov 9, 2018 #1

    drumz

    drumz

    drumz

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    I'm making box steps out of 4x8 pressure treated lumber with each one sitting on the other down to my driveway 4' below the front step to the house. I'm planning on using 5" x 3/8" lag bolts but not sure if I can get away with 2 for each end or if I should go with 3.
    Thanks in advance for your time d;-)>
     
  2. Nov 9, 2018 #2

    bud16415

    bud16415

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    I would use 3” deck screws.
     
  3. Nov 9, 2018 #3

    drumz

    drumz

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    It's 4x8's, 3" are not long enough! My question was how many, thanks.
     
  4. Nov 10, 2018 #4

    bud16415

    bud16415

    bud16415

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    Sorry I misread, so used to reading 2X.


    Your question is hard to answer as we don’t see the design. But in general two lag screws properly installed will be very strong.
     
  5. Nov 10, 2018 #5

    oldognewtrick

    oldognewtrick

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    What about making lap joints? downloadfile.jpg
     
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  6. Nov 10, 2018 #6

    nealtw

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    5" is not long enough, 6" maybe.
     

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