landscape timber question

Discussion in 'Landscape Architecture and Design' started by Scenic Lawnscape, Mar 24, 2004.

  1. Scenic Lawnscape

    Scenic Lawnscape LawnSite Senior Member
    Posts: 288

    how do you guys secure the timbers on the first row. also when you have a row that is 3 or 4 timbers high do you put a support board behind it and screw the timbers to it. Thanks for all the help

    Rich
     
  2. landscapingpoolguy

    landscapingpoolguy LawnSite Senior Member
    Posts: 819

    i didnt know anyone was still using landscape timbers...drill a hole stake it down or can even use rebar.

    Chuck
     
  3. D Felix

    D Felix LawnSite Bronze Member
    Posts: 1,898

    I don't use "landscape timbers". What I call landscape timbers are about 3 1/2" thick and have two opposite sides that are rounded.

    What I do use are treated 6x6's. Get a base prepped (excavated, compacted, compacted crushed limestone, leveled), set your first course so it will be below grade, level it, then use 1/2" rebar to pin it in place. Preferrably 24" rebar, but 18" will suffice. All other courses are secured with 8" timber screws. They cost a little more than 60d spikes (12"), but they more than make up for it in the amount of time spent driving them. If you use spikes, you need to drill a 3/8" hole through both timbers before you drive the spike, or else the spike will tend to wander out the front or back of the timber following the grain...

    FWIW, I try not to use timbers at all. Compared to pre-cast block, they have a very short life-span....


    Dan
     
  4. Scenic Lawnscape

    Scenic Lawnscape LawnSite Senior Member
    Posts: 288

    its what the customer wants:)
     
  5. kris

    kris LawnSite Bronze Member
    from nowhere
    Posts: 1,579

    use dead men to tie the wall back.
     
  6. Scenic Lawnscape

    Scenic Lawnscape LawnSite Senior Member
    Posts: 288

    ok laugh away but what is a deadmen??
     
  7. kris

    kris LawnSite Bronze Member
    from nowhere
    Posts: 1,579

    Why would I laugh?

    Installing a deadman in a wall can seem like a lot of extra work but it is vital to the strength of a timber wall. A deadman is basically a horizontal anchor that holds the wall to the soil it is supporting. Place a deadman about every 4-8' feet apart depending on the height and width of the wall. The anchor itself is made of two 3' long lengths of timber connected in a 'T'. See picture. Place deadmen every third row up a wall. I use to even put "fake" deadman wherever 2 pieces of timber meet up.

    on edit -never install timbers so that end joints align. You will most likely need to cut several timbers so that you can stagger them. Secondly, you will need to set the rows with a 1/2" batter. That is, each row should sit back 1/2" from the row below it. This is perhaps a little bit of overkill when you said your only going 3-4 high but something to keep in mind for the future ... we haven't done a timber wall in years but a well built wall can last 20 years.
     
  8. kris

    kris LawnSite Bronze Member
    from nowhere
    Posts: 1,579

    Sorry -I Lightened the pic up for you..hope this helps
     
  9. leemac

    leemac LawnSite Member
    Posts: 8

    On 6x6 timbers stake down first course with 24" rebar 4'o/c-----deadmen everyother course 12'apart if wall is over 4' high---anything higher should be checked by an enginner for load.
     
  10. EagleLandscape

    EagleLandscape LawnSite Platinum Member
    Male, from Garland, Texas
    Posts: 4,347

    Do the stakes go infront of the first base beam? Or theough it?
     

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