To generate a timber retaining wall membrane, commence by digging a trench along the range of where your wall structure will be. The trench should be approximately the depth and width of the timbers you will be using to build the wall. If you need space to work on the back area of the wall, dig that space out before you get started building the wall. Use a range level to level the ground where the timbers will lay. retaining walls adelaide hills
Place the first row of timbers flat in the trench. After your first strip of timbers is put over the trench get started stacking your next line of timbers. Stagger the ends of the timbers to ensure a very good wall membrane. Attach each layer of timbers to the coating below it with surges (8 inch long 60D nails). Timber retaining surfaces are built straight up – not slanted like stone walls – so keep a level or plumb convenient as you stack them.
If your wall will be higher than about 18 inches use tie-back timbers every eight or ten feet on various levels to hold your wall upright and make sure it will not fall forward due to the frequent pressure applied after it from in back of (top failure). To add a tie-back timber, simply lay one timber verticle with respect to the other timbers good results. its duration extending in the area that will be back packed. When the area is back filled this wooden will behave as an point to hold the wall structure in place and ensure your timber retaining wall membrane will last.
Timbers Unified into One Structure
Choosing care of my holding onto wall design which is a little different from others you may see is the fact We prefer to unite the complete timber retaining wall composition with re-bar driven top to bottom through all the timbers and into the earth by way of a hole that is drilled through all the retaining wall timbers after they are completely piled. The re-bar should fit tightly in the drilled pit.
This step might be an overkill but My spouse and i like strong stuff that lasts a long time. An alternative but similar method is to drive re-bar through the underlying part two or three levels when the wall is about half-built and then hook up the base timbers to the top layers once the top layers are added (see pictures).
Employ Properly Treated Quality Timbers
Some books and sites will recommend that you use “garden timbers” (those cheap ones with two round sides and two flat edges) to build a retaining wall but I strongly advise against that practice because “garden timbers” are typically created from the cheapest pieces of wood leftover from the production of other wood or plywood and contain mostly heartwood which does indeed not accept pressure treatments. They will probably be heavily rotted within a few years and will quickly fail.
Building a timber retaining wall is hard work so use timbers that lasts. You might even consider using timbers with a plastic or polymer coating. North american Pole and Timber is a reputable company that ships quality timbers countrywide while offering a few types of vinyl films that can make real wood last almost forever.