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    Bsmom's Avatar
    Bsmom Posts: 45, Reputation: 2
    Junior Member
     
    #1

    Apr 14, 2009, 07:45 AM
    Pergola installed on concrete slab
    I want to install a pergola on my concrete patio, if this can be done, how can I secure the posts to the existing concrete?
    21boat's Avatar
    21boat Posts: 2,441, Reputation: 212
    Ultra Member
     
    #2

    Apr 14, 2009, 11:06 AM

    The old way is to use steel pins and drill in the center of the post and concrete floor to set the post. Many old porches uses down weight as the (nailing) effect

    The bottom of the post needs to be sealed well because of mostiure wicking into that bottom.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #3

    Apr 14, 2009, 02:42 PM

    I would drill into the concrete and then set in a galvanized post box with and expanding anchor bolt. This will give side to side protection as well as lift protection from the wind. Something along this line Amazon.com: Steel 4" x 4" Mounting Plate: Patio, Lawn & Garden
    21boat's Avatar
    21boat Posts: 2,441, Reputation: 212
    Ultra Member
     
    #4

    Apr 14, 2009, 03:02 PM

    Bsmom If the bracket Bal1 suggested is visually not good for looks (although for strength is great and will rust) , you could angle drill in the post and use concrete Tap Cons to attach it better for twist and lift

    Tapcons- The Original Blue Concrete Screw || Blue Tapcon Concrete Screws

    There are other "Plate" system but all show one way or another. Some of the others lift the post off the ground but visually its ugly. I have used them and then put a wood 1by wood shoe or "boot" as we call it to hide the plates
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #5

    Apr 14, 2009, 06:01 PM

    You can get ones that are hot dipped galvanized too Galvanized Steel Bracket for 2x4 Mounting to Flat Surface

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