×
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

Core drill/insert spacing

Core drill/insert spacing

Core drill/insert spacing

(OP)
Hello all, that includes you Casseopeia,

I will ask the structural on this project this question, but thought it would be good to get this forum's input.

I have a situation where I will be penetrating a poured in place basement wall with a large quantity of conduit.  These will mostly be 4" conduit, but I also have some 6" conduit and a few smaller ones.  In one location for instance I have 16-6" conduit entering a basement from an on-site manhole.  I intend to penetrate the wall either with core-drilled holes or by using a cast-in-place pvc insert.  The 6" rigid steel conduit requires a 10" opening to allow the installatio of the link-seal assembly.  I have given a sketch to the structural engineer indicting these penetrations in a 2 wide x 8 high configuration.  So he will frame out a 10'-6" h x 2'-6" wide 'window' without rebar for the penetrations if I core drill, or we will cast the inserts in place.

OK, my question is this.  I have indicated a 6" space horizontally and vertically between each 10" penetration.  I assumed that this would be sufficient to allow working space to tighten the link-seals and prevent spauling of the openings if cored.  What would your recommended minimum spacing between core-drilled openings be?  Would that change if we used cast in place inserts?

Thank you for your patience, regards,

EEJaime

 

RE: Core drill/insert spacing

I would first see what the general spacing of the reinforcing is in the vertical and horizontal direction and try to accommodate that such that you would have a bar between each opening.

 

RE: Core drill/insert spacing

In any case for most basement walls/mats at these hole sizes no particular problem should develop; how less if acting with care and attention to detail. So continue in consultation with the director of the structural works and go ahead.

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