×
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

Residential Dock Piling Design

Residential Dock Piling Design

Residential Dock Piling Design

(OP)
I am building an 8ft x 16ft Residential fixed dock and plan to use pressure treated 4x6 posts embedded in concrete for the vertical supports (placed on 4ft-8in centers). The dock is on a freshwater lake. The dock will be in a no wake area so I will not have that much force on the dock.

The water level is dropped about 6 feet during the winter to prevent damage from ice. The posts will be 3ft above the water line in the winter. I plan to dig the post holes by hand this winter, set the 4 x 6 posts and pour the concrete. I plan to use an 18 inch dia tube for the concrete forms.

My questions are:

1) How deep should I dig the holes?  The frost line is 20 inches in my region.  Is 24in depth sufficient?

2) Do I need to add some rebar to the concrete?

3) Is it OK to embedd the treated post in the concrete or is it better to have concrete extend to the waterline and then use treated posts above the waterline?  (I am looking for 10 years service).

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