Help with retaining wall lumber size ?
I am planning to replace a railroad tie wall with landscape timbers. Quotes I have gotten indicate 6X6X8 is the size to use. Any reason I could not use 4X4X8 instead? I can get a better price on this size, comparatively. I just don't know if there is a particular reason to use the larger size.
The wall will be 6-8 ft. tall. -- approximately 1500 square ft. total.
Any advice or help is appreciated.