×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Timber retaining wall with tieback and deadman

Timber retaining wall with tieback and deadman

Timber retaining wall with tieback and deadman

(OP)
Does anybody know how to design a timber retaining wall with tieback and deadman? Can I get reference anywhere? My wall height is approximately 4.5 feet.

thanks

RE: Timber retaining wall with tieback and deadman

At only 4.5 feet high, why would you need deadmen? I [laced [4X posts at 5 foot centers, buried 2 feet in the ground and cast concrete around them and they are still intact after 25 years. No deadmen needed.

Mike McCann
MMC Engineering

RE: Timber retaining wall with tieback and deadman

Usually no one does a design. However there are some pretty good ideas on the Internet, such as "this old house video" on U-Tube for general ideas. That particular video by the landscaper obviously is not engineered, but roughly OK. I'd try to consider the zone of earth that is within the wall height x that width back as needing retaining. So any dead man should go beyond that zone. Sloping back the wall some does a significant job in making it more stable.

RE: Timber retaining wall with tieback and deadman

The problem is finding suitable cadavers that will not degrade with time.

Mike McCann
MMC Engineering

RE: Timber retaining wall with tieback and deadman

I should add, no design usually for low height walls. Sometimes commercial suppliers of wall materials will have recommended practices, etc.

RE: Timber retaining wall with tieback and deadman

Do yourself (owner) a favor. Use a segmental retaining wall instead.

EIT
www.HowToEngineer.com

RE: Timber retaining wall with tieback and deadman

(OP)
RFreund,

I prefer segmental walls. But, some builders want to save money. I don't know how much they can save. The answer I commonly get from the builders is that the timber walls being constructed for long time and they can stand several years. I believe there may be some way to design these walls. Anyhow, thanks for your input.

PEinc,

Thank you for the paper. I think some of the pages are missing in that paper.

Thanks

RE: Timber retaining wall with tieback and deadman

Fargo - I hear you but the timber wall will last how long? Where as the block should last much longer. The whole tieback method to me is very suspect. I mean you you have all these 'hinges' along the wall face where the timbers are nailed together. I mean sure you can calc the required deadman but how do you justify the pressure on the facing? I mean what is the lagging spanning between? I have only once seen drawings but no calcs.

Anyway, good luck. I'd be interested to know what you find.

EIT
www.HowToEngineer.com

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources