Help with retaining wall lumber size ?

cimmarynFebruary 6, 2009

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.

K

Thank you for reporting this comment. Undo
laag(z6CapeCod)

4x4 is not strong enough. In fact, 6x6 is only strong enough if designed properly for the application.

Walls over 4' high are required by state law (I believe every state) to have a structural engineer involved. Yes, people build them over 4' without an engineer and get away with it. It is only a problem when it fails and wrecks property or injures or kills someone. Then you are in really big trouble as well as well as having to deal with the loss.

    Bookmark   February 7, 2009 at 9:09AM
Thank you for reporting this comment. Undo
gardengal48

You will also need a building permit as well and unless the permit application reflects a correctly structurally designed wall that meets code, it won't be issued. Attempting to short circuit these procedures could result in your needing to dismantle and rebuild the wall correctly, which would be a huge and unnecessary expense.

    Bookmark   February 7, 2009 at 9:56AM
Thank you for reporting this comment. Undo
cimmaryn

Thank you for the input. If I hire a structural engineer, is there any reason I cannot build the wall to his specifications myself?

Would I be better off using railroad ties, instead of landscaping timbers?

Thanks!

    Bookmark   February 7, 2009 at 11:51AM
Thank you for reporting this comment. Undo
laag(z6CapeCod)

Yes, you could build it yourself. Design the layout and heights of the wall before you get involved with the engineer no matter what quality of drafting you have. That can reduce the amount of time it takes for the engineer to understand what you want at minimum and save a lot of design time if you have better developed plans.

    Bookmark   February 7, 2009 at 3:52PM
Thank you for reporting this comment. Undo
cimmaryn

Thank you!

K

    Bookmark   February 7, 2009 at 9:31PM
Thank you for reporting this comment. Undo
sanandnaren_gmail_com

Hi there!
If you need any kind of drafting assistance, just drop a mail, I assure you a high quality of drafting with an economical base.

    Bookmark   February 16, 2011 at 12:58AM
Thank you for reporting this comment. Undo
laag(z6CapeCod)

Two years ago.

    Bookmark   February 16, 2011 at 9:26PM
Sign Up to comment
More Discussions
Need tips to make garden spiral
so this is kind of embarrassing but I don't know how...
violetwest
Please need help 100% blank slate both front and back
Hi guys glad I found this forum been reading alot of...
lexysdad04
Huge commercial project behind me
Hi, all. The Deathstar has arrived-- that is, the 60,000...
demeron
Landscaping front yard, zone 5. HELP!!!! :)
We have recently done some work to our front yard (tearing...
midwestmelissa
Ditched my landscaper - yellow pine choice
Going to my local Camellia expert's nursery and just...
Bama_Joe
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™