Maximum CMU Wall Height - Concrete, Stone & Masonry - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Concrete, Stone & Masonry


CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 01-09-2017, 11:26 PM   #1
Member
 
Join Date: Mar 2011
Location: NE Oklahoma
Posts: 655
Rewards Points: 1,225
Default

Maximum CMU wall height


I'm just curious. I know there's a lot of engineering and incomplete information but, just generally speaking, can you build a house with a basement and two floors using 8x8x16 CMUs? I assume you'd have to fill all of the holes with concrete and lots of rebar but has anyone ever done such a thing and have it hold up?

Advertisement

dalepres is offline   Reply With Quote
Old 01-10-2017, 06:04 AM   #2
Member
 
concretemasonry's Avatar
 
Join Date: Oct 2006
Location: Minneapolis/St. Paul, Minnesota - Latitude 45.057 Longitude -93.074
Posts: 4,059
Rewards Points: 2,608
Default

Re: Maximum CMU wall height


You can build a 2 two story home with a basement using 8x8x16 CMUs.

Depending on the soil type retained, it there would be reinforcement is some of the cores, but filling the cores without a rebar is a total waste of time and money and adds little strength or no lateral strength. The vertical strength is rarely a problem.

Concrete masonry units have great compressive strength as shown in the many high rise buildings that are partially reinforced even for 8x8x16 CMU on buildings up to 22 stories. The strength of the mortar is rarely a factor in the strength of load bearing masonry, since the block can be made in any strength for large projects (A typical block is more than 35% above the minimums just because of the manufacturing process because the ASTM strength standards/requirements happen to be too low. - I actually costs more to make a low strength block.

Dick

Advertisement

concretemasonry is offline   Reply With Quote
The Following User Says Thank You to concretemasonry For This Useful Post:
dalepres (01-11-2017)
Old 01-22-2017, 07:56 PM   #3
Member
 
Join Date: Mar 2011
Location: NE Oklahoma
Posts: 655
Rewards Points: 1,225
Default

Re: Maximum CMU wall height


I'm giving this some more thought. I've searched the Internet for hours upon hours and find plenty of instructions for making block retaining walls and a few industry sites with some block details but still the amount of instruction on engineering or designing block homes is limited.

Can you recommend any sites or books with details on block construction? I'm not adverse to spending a few years as an apprentice and learning the hard way but I'm 61 years old and I'm pretty sure I'd never get such a job

Specific areas I am looking for information on that I have not been able to find much, if anything, on include:
  • details on attaching perpendicular walls/shear walls - I've seen instructions for sort of weaving the perpendicular wall in and I've seen instructions that say never, ever, do that - always use metal brackets to attach the sheer wall.
  • how long can a wall be (I know - depends on my area - NE Oklahoma. ) without shear walls. Would pilasters be enough? Wind zone is 80 mph and seismic zone is 2a but with the increase in seismic activity in Oklahoma I would want to build to 2b or even 3.
  • how to frame/support/attach poured concrete floors at the first and second floor.
  • assorted flashing details for door and window openings, etc.
  • insulation/moisture-proofing. Foamboard on the outside or inside, etc.?

I'm considering a couple of small buildings this spring. I need a generator/battery building for power backup and might build another small building. These certainly don't need to be block but it will give me some practice and opportunity to make mistakes in less demanding buildings and possibly convince me how foolish this idea is in the first place.
dalepres is offline   Reply With Quote
Reply


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
Updating Timber & Balloon Framed Home (LONG POST) Pittsville Building & Construction 13 05-29-2013 12:15 PM
Wall damage below bathroom quaker87 Plumbing 8 02-28-2013 04:56 PM
How to Square a Wall or Layout for a Foundation BigJim How To Guides 2 01-31-2013 09:48 PM
Adding wall with door opening - sloped ceiling and no joist for top plate Jebross Remodeling 11 01-11-2012 09:34 AM
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