Use a drill bit that is slightly smaller than the landscape timber spike. The spike will permanently connect the two timbers together so they do not fall off each other. Position the timber spike into the pre-formed hole and use a sledgehammer to drive the spike completely into the hole.
Drill 3/8-inch pilot holes vertically through the timbers about 6 inches from each corner, using a 3/8-inch drill bit for the task. Drive one galvanized timber spike through each of the 3/8-inch pilot holes and into the timber by using a 3-pound mini-sledgehammer. The timber spikes add strength to the corner joint.
Pressure-Treated Landscape Timber
The active ingredients may vary, but the solution commonly includes alkaline copper quaternary, copper azole or micronized copper azole. These ingredients are key in protecting the wood from termites, fungus and moisture.
Drill a hole into the top corner of each end of the top landscape timber. Use a drill bit that is slightly smaller than the landscape timber spike. The spike will permanently connect the two timbers together so they do not fall off each other.
Use brackets on the inside of a raised garden bed for a little more strength at the joints and corners. You can also prevent the landscape timbers from bowing out from the pressure of the dirt by pounding a piece of rebar into the ground immediately adjacent the outside of the landscape timbers.
Set your miter saw or miter box to 30 degrees, and cut both ends of the timbers so there’s a long and short side on both ends. This removes 30 degrees and leaves a 60-degree angle on the ends. When you put the pieces together like a puzzle, you end up with a circle.
Lay the second row of timbers, staggering the seams above the timbers below. Pitch the second row, and every subsequent row, into the slope by 1/4 inch from the row below it. Drive galvanized spikes between the first and second rows to secure the wall. Predrill the wood to make the work easier.
Staining Treated Wood
Not only can you stain treated wood, painting and staining pressure-treated wood is actually good for your new deck. Although the treated wood doesn’t need to be protected against rot, staining it will help reduce surface cracking.
The fun fact about pressure treated wood is that it is warrantied – but putting it in continuous contact with the ground voids the warranty. Even so, you can reasonably expect to get anywhere from 10-20 years out of a timber wall.
Temporary ground anchors are used on construction sites as part of a retaining system and prevents the excavation works from collapsing. GDS drill into the surrounding bedrock and grout into place high tensile strand anchors.
They can achieve a holding capacity of up to 3,000 kN. They have low environmental impact.
Causes of Retaining Wall Failure
Saturation of backfill: Saturation of the soil behind the wall without adequate drainage significantly increases pressure on the wall leading to failure. … Timber retaining walls typically last around 20 years, whereas masonry and concrete can last anywhere from 50-100 years.
All timbers that must be stacked above the base wood simply need 12-inch long spikes installed at the same angle for safe construction.
Use a chain saw for rough-hewn timbers or railroad ties. Wear safety glasses and gloves for this sort of cut. You’ll measure out your cuts the same, but leave the timber on the ground for cutting.
An eight-by-eight full-sawn landscape timber — 8 feet long — is really 9 inches deep, 7 inches wide and 102 inches long, so it’s close to standard railroad tie size. Landscape timbers come in a variety of sizes other than the original railroad tie size.
Sanding pressure-treated wood is actually contraindicated because, as Sand & Stain warns, you’ll end up partially removing the protective coating created by the pressure treatment, and the wood will look terrible.
Why is some treated wood green? The green color you see on treated wood is caused by chemical reactions that take place between the preservative components and the wood. Copper is still the most widely used element in wood preservatives and creates a green color on the wood.
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