Blockwork Wall with 3 Tonne object hanging from side of wall
Blockwork Wall with 3 Tonne object hanging from side of wall
(OP)
Hi Guys,
Ive got a blockwork wall 4 meters in height and its supported a 3 tonne object bolted into the side of the wall at half its height. I'm guessing this will place quite a large concentrated moment onto the wall. I'm not 100% sure about how to go about designing this wall to deal with this moment. I'd say that im going to need quite a bit of load on the wall in order to generate enough friction force for the mortar to stop bricks from locally getting pulled out. Any help/guidance on this would be much appreciated.
Ive got a blockwork wall 4 meters in height and its supported a 3 tonne object bolted into the side of the wall at half its height. I'm guessing this will place quite a large concentrated moment onto the wall. I'm not 100% sure about how to go about designing this wall to deal with this moment. I'd say that im going to need quite a bit of load on the wall in order to generate enough friction force for the mortar to stop bricks from locally getting pulled out. Any help/guidance on this would be much appreciated.






RE: Blockwork Wall with 3 Tonne object hanging from side of wall
Make sure you know the center of gravity of the object to calculate the moment.
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
BA
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
Designing the wall for flexure, shear, and axial load is important but designing the connection to the wall will probably be critical, as you rightly anticipated. And yes, whether or not you pull a block out of the wall, or yank a cone out of a block, will be very important. I'd recommend posting a sketch of your proposed connection detail so that we can provide meaningful help with that.
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: Blockwork Wall with 3 Tonne object hanging from side of wall
Aside from the moment and the connection of the new equipment mentioned by others, everything should be checked. I suggest you talk to a mentor or senior engineer at your office. Often times, an experienced engineer can look at many aspects and deem it OK by inspection. Without that experience, every aspect of the wall design needs to be checked as well as the foundation below and any connection to the structure above.
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
It's all good advice above regarding the bending capacity of the wall and its attachments. I'll also suggest that the support assembly for the object be designed to keep the vertical distance between connection points as large as is practical, so that the pull-out on the upper connection is minimized.
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
Well at least his design would be conservative as these only weight about 700 lbs.
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
I think more information is needed. A sketch might help.
BA
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
I'm on the road at the moment so won't be able to provide a sketch. However, what I've got is an EXISTING 390mm x 190mm Unit Concrete block wall. The owner wants to essentially bolt a rack of powerlifting weights (see picture below). I want to design the wall assuming that it is unreinforced ( apologies I should have mentioned this in my first post). I guess my main concern is pulling out a block due to the tension force. How do I check this? I've checked the moment capacity of the wall, shear etc.
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
The bracket shown, as noted, does not appear to be anywhere adequate.
Dik
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
I'm not sure how he is getting 3 tons, however. That rack looks only capable of holding 6 or so 45 lb. plates on each pipe.
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
Dik
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
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: Blockwork Wall with 3 Tonne object hanging from side of wall
Dik
RE: Blockwork Wall with 3 Tonne object hanging from side of wall
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: Blockwork Wall with 3 Tonne object hanging from side of wall
Dik