2x4 Decking Advice

Discussion in 'Builders' Talk' started by stewy_9mw, Aug 12, 2021.

  1. stewy_9mw

    stewy_9mw New Member


    I'm looking to build decking and I've just ordered 2x4" joists (C16, pressure treated to BS8417) and want to make sure it's ok for my current plan or should I change for 2x6s or put in more support? The joists are within 30cm OC and have lots of noggins and raised by 40-60mm from the ground using Jouplast Adjustable Decking Risers, which I will use 4-6 on each joist. The decking area will be 5.5m x 3.6m.

    Current plan of the joists & decking are attached (doesn't have the risers in the plan). Any suggestions welcome!


    Attached Files:

  2. stevie22

    stevie22 Screwfix Select

    C16 2x4 will span 2m at 400crs so 2 edges plus centre support will be fine.

    Lay 3 cross timbers though as you will never get a true surface with 100 odd separate supports and you'd have no lateral stability if you did.

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