Retaining Wall

[gamecoder.nz]

Hi everyone,

I'm building a timber retaining wall around the edge of my layout and two of the corners are angled like this but I'm not sure how I would go about building them

 

[GAP]

Cut the diagonal board longer than the 2 side boards so it overlaps them.
Sit it on top of the 2 side boards mark the angle then cut the side board ends at the angle.
Drop the angle board down and mark the length using the side boards as a guide for the angle, then trim it.
When all boards are trimmed drive some "batten" screws board into the upright posts to secure them.
You can also drive some "batten" screws through the angle board into the side boards to give extra strength.
Use batten crews about 30% longer than the timber to make sure you go all the way through and get a good purchase in the upright posts.
Dig the uprights at least 300mm into the ground and use rapid set concrete to stop them moving. The hole depth depend on how high you ares going with the wall.

 

[maxi-model]

My instincts would be to use the boards at the sides as a means of retaining the board in the centre. I.E. your centre board is cut long at the back tapering to a narrower front with the side boards "clasping", so to speak, this center board. Certainly use, as stout as practical, support posts cemented into the ground with "postcreate". The facing boards need to be pretty thick as earth, even on level ground will compress and cause these to bulge if not thick enough. My local garden works specialist spec'ed 4" thick stained oak "sleepers" for my retaining walls and 3" square support posts. Screw fixings same as sugggested by GAP. My walls though meet at 90° or are free standing at one end. They have been up 10 years and not failed yet. Some old concrete sloped paths, capping debris and hardcore, were removed to create the flat and permeable, 20mm green granite surfaced, area in front. Retaining walls are 30" tall. Max

Basic works before track laying. Note "rice crispy" pads put in to level and support points & crossings

90° Butt jointed corner. Note cossing beam that supports one side of turning triangle (Y)

Free standing end, this part just has free standing waste concrete "rocks" acting as capping.

View out the kitchen window now. Those little trees and plants have grown. The little folk have moved in and built a town too