Retaining wall construction building a timber retaining wall
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Retaining Wall Construction Building A Timber Retaining Wall. Developed by: Dr. Teri Hamlin Georgia Department of Education. Timber Retaining Wall. To level a steep slope Enclose an area for a decorative garden Elevate Beds. Which wood?.

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Retaining wall construction building a timber retaining wall

Retaining Wall ConstructionBuilding A Timber Retaining Wall

Developed by:

Dr. Teri Hamlin

Georgia Department of Education


Timber retaining wall

Timber Retaining Wall

  • To level a steep slope

  • Enclose an area for a decorative garden

  • Elevate Beds


Which wood

Which wood?

  • Treated pine and hardwoods are good choices for a timber retaining wall.

  • Avoid old railway timbers as these are treated with creosote, which harms some plants and heavy to work with.

  • Also need reinforcing rods secure the structure.


Steps

Steps:

  • Cut a beveled trench into the slope, wet the trench and tamp it well.


Steps1

Steps

  • Set the first timber in place and level it.

  • This course will be completely buried in the ground.


Steps2

Steps

  • The timbers are installed in a pattern similar to a brick wall with the butt ends of timbers in one course offset from those in the courses above and below.


Steps3

Steps

  • Set a second timber on top of the first and bore a hole through the two timbers.

  • Use a heavy-duty drill with an extension bit.

    • A small bit burns out on long holes such as these.

  • Drive a reinforcing rod through the holes into the ground to hold the timbers firmly together.


Steps4

Steps

  • In addition to the 15 degrees inward slope of the wall, vertical stability is achieved by installing tiebacks.

  • These are single timbers inserted perpendicularly from the face of the wall into the soil backfill to a distance equal to their height above the base of the wall.


Steps5

Steps

  • Continue to lay the timbers

    • staggering the joints from one course to the next

  • Drill holes and use a reinforcing rod to pin each timber to the one below on each side of every joint.

  • Cut timbers with a sharp chain saw, and wear goggles to protect your eyes from flying chips.


Steps6

Steps

  • Backfill where necessary.

  • For drainage,

    • Drill weep holes along the wall's length

    • Drill a row of holes above the ground


Steps7

Steps

  • Fill the cavity.

  • You can top off the terraces with plantings or mulch.


Completed jobs

Completed Jobs


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