×
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

Pulling Cable in Trench

Pulling Cable in Trench

Pulling Cable in Trench

(OP)
Could anyone share info on the coefficient of friction for pulling PVC jacketed cable on sand.  I've had no success with the resources available to myself.

Thank You,
Gord

RE: Pulling Cable in Trench

Are you proposing to pull a cable into a trench instead of laying it in?

RE: Pulling Cable in Trench

(OP)
Yes, if I want to change standard operating procedure here I'm going to need the numbers to prove it.

RE: Pulling Cable in Trench

I am sure that the number exist if you keep looking long enough.  
Why not get a chunk of the cable just drag it trough some sand?  Put a scale on it and drage it through dry and wet sand.  I  would drag a couple of lengths at different speeds to see variations of tensions with length.
Check the static and dynamic friction.  

I don't think you'll get a friction factor in the classic sense.  It's going to be a rolling resistance of sand grains to sand grain and will vary with the type and size of sand.  It will also vary with the wetness of the sand.
 
You may have to schedule a field trip to the beach.  

I would think sand would have a low friction and be easy to pull through----but then there was that 40 yard sand crawl our DI liked us to do so much. It looked easy until the first time I did it.

RE: Pulling Cable in Trench

(OP)
I probably would if it wasn't under 3 feet of snow.  Thank you though, point well taken.

RE: Pulling Cable in Trench

Field Trip!!
Lots of places with sand and no snow.
Florida, Hawaii,  Aruba,   Virgin Islands
See you travel agent.

RE: Pulling Cable in Trench

Why not avoid the problem and use cable rollers, makes life much easier..
Jb

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