Existing CMU Shear Wall - Remodeling - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Remodeling


Thread Tools Display Modes
Old 03-22-2008, 02:23 PM   #1
Join Date: Mar 2008
Posts: 1
Rewards Points: 10

existing CMU Shear Wall

Can anyone give me an idea of what the process would be for cutting an opening for a door in a CMU Shear wall? How would the loss of structure be compensated for?



g8rdd is offline   Reply With Quote
Old 03-22-2008, 02:40 PM   #2
Lic. Builder/GC/Remodeler
AtlanticWBConst.'s Avatar
Join Date: May 2006
Location: New England
Posts: 7,556
Rewards Points: 2,000

Structural Steel Lintel, or steel beam.

If it is a commercial wall, you may need to get some documentation as to the weight baring capabilities of the lintels/beam spec per opening dimensions.

Contact a local steel supply company.


- Build Well -

Last edited by AtlanticWBConst.; 03-22-2008 at 03:39 PM.
AtlanticWBConst. is offline   Reply With Quote
Old 03-22-2008, 04:08 PM   #3
concretemasonry's Avatar
Join Date: Oct 2006
Location: Minneapolis/St. Paul, Minnesota - Latitude 45.057 Longitude -93.074
Posts: 4,076
Rewards Points: 2,642

What makes you think it is a shear wall? If it is not a shear wall you may be making a mountain out of a mole hill.

What kind of structure? What is the wall height? What puts the shear load into the wall? What is the floor system above? Are you in a seismic or hurricane area?

For a block wall in a wood frame structure, the vertical loads are not inportant because the masonry is many times (10X?) stronger than a wood frame wall. You just have to span over the opeing you created for vertical support.

Once you cut a door-size opening in a real SHEAR wall, you dramatically decrease the shear strength of the building. Beams and lintels do little for SHEAR, but they are necessary to span over openings and possibly necessary if you have to tie the two sections together and do not have a rigid diaphragm floor above.

Find out if it is really a shear wall and what the shear on it is. The two shortened sections of the wall that are left may be adequate, but who knows now without any information.

concretemasonry is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Raising Doorway Height (load bearing?) treefrog Building & Construction 6 02-25-2008 09:11 PM
Adding large windows and a door to existing wall cpused Remodeling 7 02-23-2008 10:07 AM
corner bead on existing wall stallinc Building & Construction 12 01-30-2008 07:38 AM
Marrying a sloping stone wall to a cinder block wall. mrdol Landscaping & Lawn Care 1 11-09-2007 04:08 PM
Atlantic-need your opinion on markd's comments about my vapor barrier? yummy mummy Building & Construction 11 03-07-2007 09:47 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1