×
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

Cribbing Shoring Jacking - Residential

Cribbing Shoring Jacking - Residential

Cribbing Shoring Jacking - Residential

(OP)
Does anyone know of good design examples and/or references for cribbing to temporarily shore a home?

RE: Cribbing Shoring Jacking - Residential

For cribbing design I have always tried to look at available mobile home details. Since they are almost always supported on cribbing. Might be a place to start.

RE: Cribbing Shoring Jacking - Residential


You might want to check out the web sites of building movers for some ideas. Does it have a full basement or just a crawl space?

Ralph
Structures Consulting
Northeast USA

RE: Cribbing Shoring Jacking - Residential

Take a look at the CSA - Z240.10.1 standard for Site Preparation, foundation and anchorage of manufactured homes. This standard has some cribbing details for permanent foundations, which could be adapted.

House lifters and mover quite often have the stockpile of cribbing material and use their own tried and true methods for the temporary support of houses.

RE: Cribbing Shoring Jacking - Residential


I worked with a building mover on a university classroom building to temporarily shore up a 3 story concrete-framed building so that 8 columns could be removed and the crawl space excavated to provide a full-height basement. They were far more prepared to set up the required cribbing and beams than my client would have been. It went much faster than planned and my client was very happy with the results.

I guess it all depends on the whole story - which you haven't really described. Why are you temporarily shoring the house? Are you replacing the foundation?

Ralph
Structures Consulting
Northeast USA

RE: Cribbing Shoring Jacking - Residential

DSKENGR:
The bldg. mover or the G.C. kinda do this stuff by the seat of their pants, with considerable judgement and experience under their belts, plus paid-up liability insur. premiums. And, they (many of them) seem pretty successful at it for the most part. I’ve seen some pretty large structures lifted and/or moved. They don’t have/use some grand bldg. code with an exact factor of safety of 1.6667 or 2.0000 against everything or anything. We as Structural Engineers have to approach these problems from a sort-of reverse engineering standpoint. Codes aren’t much help, but it has to be safe and sufficient, and good engineering judgement is required. We know the bldg. is standing and being supported by columns, beams, bearing walls, exterior walls. We should normally jack and crib at or near these locations, but initially these elements must stay in place. You must study how this load shifting will be taken by immediately adjacent structure. How can you distribute the loads so this can happen? Generally, you have some control over the live loads which are a significant portion of the total loads on the structure. You may well need some temporary support beams btwn. the actual primary structure and your jacking and cribbing. All of this is different in layout for each different structure. While mobile homes may have some cribbing as part of their support system, its location is also well defined by the nature of the structure.

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