Something mesmerizing about this CMU video
Something mesmerizing about this CMU video
2
JAE (Structural)
(OP)
For those of us who specify concrete block masonry - this is almost a theraputic video of a good mason.
Even though I'm on the design side (i.e. draw pretty pictures) I've always held a lot of respect for the skilled masons, steel workers, etc. that
actually build what are minds dream up.
Enjoy: Mason video
Even though I'm on the design side (i.e. draw pretty pictures) I've always held a lot of respect for the skilled masons, steel workers, etc. that
actually build what are minds dream up.
Enjoy: Mason video






RE: Something mesmerizing about this CMU video
He also had a very good tender that stocked the block with the tops up. That allows a "one-handed" mason to easily pick up the block much easier by saving movements and makes the top mortar bed area a wider surface to minimize mortar droppings in the cores.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.
RE: Something mesmerizing about this CMU video
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RE: Something mesmerizing about this CMU video
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: Something mesmerizing about this CMU video
Not sure why a knock-out block got thrown in there unless sequential filled cells.
RE: Something mesmerizing about this CMU video
RE: Something mesmerizing about this CMU video
RE: Something mesmerizing about this CMU video
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.
RE: Something mesmerizing about this CMU video
RE: Something mesmerizing about this CMU video
RE: Something mesmerizing about this CMU video
I used to go to bed tired and with a real sense of accomplishment and sleep well; now I go to bed spun out and can't sleep.
Funny how much different your body reacts to being physically tired and mentally tired.
For me personally, I don't feel like I can truly rest well without being physically tired.
RE: Something mesmerizing about this CMU video
RE: Something mesmerizing about this CMU video
RE: Something mesmerizing about this CMU video
The block are probably 12" nlock because of the height or spacing of lateral supports because an 8' high wall would usually built out of 6" block or 8" block irregardless of the vertical load.
Many contractors prefer the "eye and pintel" system over the cheaper, much longer welded tabs on the joint reinforcement because the fixed projections slow up the brick work.
Dick
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.
RE: Something mesmerizing about this CMU video
Looks like some of the photos on these:
http://www.cement.org/masonry/faq_ties.asp
http://www.masonryconstruction.com/industry-news.a...
RE: Something mesmerizing about this CMU video
This wall looked like an exterior wall to me with what I saw on the ground below. As I am in a high earthquake zone, I was very surprised to see none of the webs in the 8 to 10 block length of wall get any grout. The only vertical "reinforcing" I saw was just a metal guide joining two blocks about 3/4 of the way through the video or so. If there was any horizontal reinforcing in the wall, it was just not present at that level.
This means the only shear value in the wall is at the periphery of each block, reducing the available shear area between courses by about 17% or so.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Something mesmerizing about this CMU video
The vertical "reinforcement you saw was a probably a preformed stiff rubber section common used for control joints.
I also did not see and horizontal reinforcement, but assumed it was "DuroWal" ladder type (or equal) with the cross wires properly aligned at the location of the block cross webs. Usually, the "eyes" are not attached at the location of the cross wires to maintain an even thickness since the cross web lap welding increases the effective joint reinforcement unless butt joints are required. - Any variations vertically increase the cost and problems to maintain vertical height wall control and many engineers avoid extra heavy, galvanized joint reinforcement unless absolutely necessary.
I also did not see any vertical reinforcement on the section in the clip and assumed the wall section was not required to be reinforced vertically. I could not pick up any bottom clean-outs/observation sites for high lift grouting, but it may have been low lift grouting (only 4 courses shown) and lapped reinforcement may have been permitted based on the engineer and inspectors approval and past performance. I have seen numerous 10-20 story 6" partially reinforced load-bearing buildings constructed without any of the detrimental clean-outs and no site sampling of units or prisms made because of early engineering involvement with inspection and the contractors that were known in advance. - Unfortunately that is a rare opportunity in the U.S. and Canada.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.
RE: Something mesmerizing about this CMU video
I have a lot of respect for tradesman who are artists at what they do, like a good drywall mudder can do the job in a 1/4 of the time it takes me, with 1/4 the mud, 1/4 the mess, and it looks 5x better.