×
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

Cutting an opening in a CMU wall

Cutting an opening in a CMU wall

Cutting an opening in a CMU wall

(OP)
We are doing a remodel at our church that consists of cutting a large opening in a CMU load bearing wall. My question is in regards to supporting the bricks above the opening during demo before we set in our steel supporting beam and column.

Bricks are 6 1/8" wide and the wall is about 10' high. We would like the opening to be 7.5' tall x 16' wide.

What, if any, is the best way to support the bricks above the opening during demo?

Thanks

RE: Cutting an opening in a CMU wall

It's a load-bearing wall. What has your contractor/engineer said about the "load" that needs to supported. It sounds like you're only asking about the bricks (the masonry) falling down into the new opening as if they were the problem.

Or are you describing the problem as if the entire wall might fail because the load remains, but the masonry are being removed?

RE: Cutting an opening in a CMU wall

Needle beams are one popular alternative. DIY church renovations are notorious for falling down during construction. Please do ensure that you have competent design and construction help if any of this is outside of your normal area of practice.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Cutting an opening in a CMU wall

(OP)
@racookpe1978: As far as the load goes, we will be able to support it because we have access to the joists. So my questions is definitely in regards to the masonry falling/collapsing from it's own weight as we demo the wall.

@KootK: Thanks for the comment about the church renovation fails! We are definitely discussing contracting this out to take care of this issue.

We've looked at and brainstormed quite a few options just wanted to have some more eyes on it.

Thanks

RE: Cutting an opening in a CMU wall

hi first time post here you will need the structural eng calcs for the doads in KN this will allow you to design the tempoary works i would not space your needles any greater than 750mm apart but be aware acro props are only good for about 12 KN AND IF ANY THING WAS TO GO AMISS IF YOU DONT HAVE A DESINED TEMPOARY WORK AND INSUREANCE YOU ARE TAKEING A BIG RISK aslo i would lace an brace the props with scafold tubes fingers crossed and a prayer to god wont cut it lol oh and fit temp wooden boards between the steel needles to stop any loose brickwork falling down between the needles good luck mixgas

RE: Cutting an opening in a CMU wall

Note to self: never post drunk with caps lock engaged.

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! Already a Member? Login


Resources

White Paper - How ESI is Helping Move New Medical Device Product to Market Quicker & More Cost Effic
Early Supplier Involvement has long been a strategy employed by manufacturers to produce innovative products. Now, it almost seems like a necessity. Because decisions made in the design phase can positively affect product quality and costs, this can help add value to OEM bottom lines. This white paper will discuss many facets of ESI, including why it’s so valuable today, what challenges limit the benefits of ESI, how cost is impacted, and more. Download Now
White Paper - Moving to a Driverless Future
This white paper describes what we see as the best practices to support a sustainable engineering process for autonomous vehicle design. It exposes how to use simulation and testing in common frameworks to enable design exploration, verification and validation for the development of autonomous cars at a system, software and full-vehicle level to drive a mature product development process for automated driving. Download Now
Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now

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