Timber Retaining Wall Design Manual

Make the trench about 8 inches deep.

Timber retaining wall design manual. However some regulatory and structural issues are discussed. Section we needed 10 stanchions plus one for the end making 11 for each wall. The focus of the guideline is the geotechnical aspects of retaining wall design. Soldier pile walls 22.

Round or square posts this will determine post spacing and hole depth. Drive timber pegs in the ground at both ends of the wall and set a string line between the pegs to indicate the back of the wall. Swimming pool walls 18. Next mark the ground with chalk every 3 feet to indicate where to drive the posts.

Dig a foundation trench for the first row of timbers image 3. Line the trench and excavation with landscape fabric then add 2 or 3 inches of gravel and tamp it in place. Connect the stakes with a string and adjust until it is level images 1 and 2. Two walls required double that number or 22 stanchions.

The objective of this guideline is to provide information on retaining wall design in accordance with the city of nanaimo the city and the british columbia building code bcbc requirements. The bottom edge of this row will be about 2 inches below ground level. Cut back the face of the bank to allow for a space of at least 300 mm behind the back of the wall. The top row of boards should be flush with the tops of the posts.

Cantilevered tilt up walls 13. Pilaster masonry walls 19. Then dig the holes for the posts fill them with wet cement and insert the posts immediately. Segmental retaining walls 17.

Install a final row of boards along the bottom using 2x6 boards. Design and draw up a plan of the retaining wall you want to build including. Lay out the wall excavate the soil behind it and dig a trench 8 inches deep for the first course of timbers. Excavate the bottom of the slope to create a level base for the wall.

Once you ve drawn up your plan measure the quantity of materials you ll need and order them. How retaining walls fail. Nail the 2x8s to each post with two 16d nails nailing through the slope side of the boards and into the posts. Construction topics and caveats 24.

Wood retaining walls 14. Make sure the trench is level and flat. Restrained non yielding walls 20. Divide the total wall length of each tier by 4 and add 1 to get the total number you need to build.

Step 1 remove soil and dig a trench. Remove any topsoil along the line of the wall and dig out to a firm level foundation for the wall base. Figure out lumber quantities by first determining how many stanchions you need.