I beam depth for sleeper wall

[jason61c]

Hi all.

I've 22M of retaining wall do build, 1.2m above ground level.

I looked at blockwork, then rendered but wasn't keen on the look.

So i'm going to go for untreated hardwood railway sleepers, 2.6m x240x150. Supported with I beams. I was going to do them vertical, however would a 5deg towards the garden be a better idea?

How much beam should go into concrete? 600mm? Has anyone got any other ideas or thoughts?

Thanks in advance.

 

[mac42]

With that much to do I wouldn't accept the advice of anyone on this forum with a finger-in-the-air estimate. Find a structural engineer. It won't cost more than a few hundreds and it may save you money overall by avoiding over-engineering.

 

[liam86]

Have a look at this:
http://www.pavingexpert.com/featur08.htm
Should Help.