×
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

New Door Entrance in Existing Building

New Door Entrance in Existing Building

New Door Entrance in Existing Building

(OP)
An Architect wants to place a new door in an existing building that has an earth berm with a foundation just under the existing floor. I pointed out to him that this could get expensive with the cost of underpinning down to frost for the existing footing. Another aspect that makes it interesting is that we are in granular material.

We talked about using insulation but I am not totally convinced that the insulation will cover all paths of frost potentially getting below the footing.

Another thought was to install helical anchors down to below frost level but it still may be possible for frost to push up on the bottom of the footing unless it was underpinned.

Any other ideas?

RE: New Door Entrance in Existing Building

The force caused by freezing can be extreme... you might be better served by examining the use of insulation...

dik

RE: New Door Entrance in Existing Building

If the immediate interior is heated, I agree with insulating as a possible solution.
Truly granular material which extends from your footings and well beyond frost depth may reduce frost heave potential. Silts or clays which are less permeable will "perch" a melt for subsequent freezing in place. Granular material may reduce perching of water and thus reduce frost heave.

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