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!

*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.

Jobs

Typical range of depths for wooden piles in coastal/beach residential construction?
3

Typical range of depths for wooden piles in coastal/beach residential construction?

Typical range of depths for wooden piles in coastal/beach residential construction?

(OP)
Not doing a design, just working out preliminary concept pricing for a client. Presume the client is anticipating hurricane loads in a coastal V zone. Granular sandy soils.

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com

RE: Typical range of depths for wooden piles in coastal/beach residential construction?

Edit shown in red. Typical timber pile embeddment for the South Carolina coast, with "granular sandy soil" per the OP's question. Few residences are built the V zone; most are in the A zones. Reasons for this:
1. The State owns all beaches up to the high tide line.
2. State law (SC Beachfront Management Act) establishes additional "set back" distances based on specific, local erosion rates.


From 10' to 20' embeddment, for for the A zone. See FEMA Home Builders Guide to Coastal Construction - Pile Design & Installation

www.SlideRuleEra.net idea
www.VacuumTubeEra.net r2d2

RE: Typical range of depths for wooden piles in coastal/beach residential construction?

the building should be above the flood level including waves and the piles below the scour depth. if so, the scour could easily be 10 - 20 feet deep and the piles would need to go well below that to anchor the structure.

RE: Typical range of depths for wooden piles in coastal/beach residential construction?

You need piles longer than 10 to 20 feet along the Florida panhandle. It also has alot to do with subsurface conditions. Our coastal residential projects typically involve piles embedded from 20 to 35 feet below existing grade. Most contractors jet the piles to within 5 to 10 ft of the designed tip elevation then drive the remaining distance. So you lose about 50% of your shaft resistance in the jetted zone.

cvg is right. You need to check scour depth as that is what typically governs the depth of piles along the coast.

RE: Typical range of depths for wooden piles in coastal/beach residential construction?

during inundation and scouring, you cant count on any of that first 20 feet to provide any uplift capacity anyway, so jetting is the way to go It should be easy installation through beach sand, unless you hit debris or bedrock

RE: Typical range of depths for wooden piles in coastal/beach residential construction?

(OP)
Thanks guys. Pink stars all around.

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.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


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close