If an existing column has limited shear reinforcement which methods can be used to repair it?
102598
If possible, replace it, if not reinforce or add another column. Add K braces. Encase in a new Shear-Wall.
1036736
Since the 'alterations' you want to make will have little impact on the aesthetics of the structure and also is a responsible thing to do from an environmental standpoint, I would try going to a meeting of the HOA and plead my case in person to the people who make the decisions. Perhaps they will see the merits of your plan and agree to change their by-laws to allow certain alterations when there is a compelling reason to do so. Then if the still don't acquiesce, that's when I would start planning to destroy them.
1081083
1) Fix\n\n2) Clear.\n\n3) Embed.\n\n4) Section.\n\n5) Mount.
402913
well, I don't know about the testing, but for design, you use 0.4Fy as your shear strength. If you have 36 ksi steel, then you need 14.5 ksi to create a shear failure. Don't know if that works forpunching holes; it's probably less. Good question.
265221
Punching shear is the exactly what it sounds like - it's the total shear measured around an item that sits on or is supporting a slab.  Picture a concrete slab supported by a concrete column.  Now put a million elephants on that slab - if the slab sheared off around the top of the column - leaving the slab (and elephants) on the ground and the column still standing . . . that would be punching shear failure.
894768
A patch can help make it stronger. Good Luck!
11060
You may want to consult the manufacturer.
814300
Some of the techniques are: active and passive damping; minimiization of masonry in tension (such as avoidance of overhangs and use of ring collars); reinforcement of structures at high-stress areas; cross-bracing; deliberately flexible design; base sliders or rollers to accommodate ground motion. See the refs. below.
594108
Here's the article how to fix it.
260924
You need to have a set of plans showing the dimensions and location of the foundation and the columns. Columns are made of concrete or steel and they need to be built in a very precise manner, because the steel beams that will be mounted on the columns are designed to fit precisely, and if they do not fit properly, the building will be unsafe and could even collapse.\n\nIt requires very precise measurements, made using high precision scientific instruments, to do the job successfully. Trying to do it cheaply, with inferior equipment, such as a measuring tape, is not likely to produce good results, and could create problems that may be very expensive to fix. Therefore, its not something you should try to do yourself. I recommend that you hire an experienced construction surveyor, or a contractor with personnel who have been trained to perform construction field engineering. If you hire a professional, and something goes wrong, they will bear the liability, but if you try to do it yourself, and you make a mistake, you will be stuck with paying to fix the problem.
1153708
Try a small piece of linoleum or formica or paneling.  \n\nHope that helps.
1144376
if its somewhat large, or near something very important, i would recommend going to a local geotechnical/ civil engineer.  \n\na few hundred bucks may be worth it not falling over, and then you are out the wall and the money.  better safe than sorry.\n\nan engineer will review site and soil conditions to give you a quality end product, and a guarantee
790914
Ideally, nothing ☺\nBut if it's been rebuilt, the ways are reasonable straight and parallel, the bed is flat, and the spindle doesn't wobble, I'd guess around $5K or $6K depending on how many mills, tools, collets, etc. are getting thrown in with it.\n\n\nDoug
1157385
I would suggest puchasing a new one as well, you may be able to repair that, but the structure itself may have been compromised and I wouldn't want to risk having it break entirely.
607374
I don't know if this really answers your question, but they are currently doing a seismic retrofit to the bridge wherein they are pretty much replacing the whole bridge piece by piece while it is still in use.  So I guess the answer right now is no, but hopefully yes when they are done.
488987
A piece of 3/4 plywood might be a good place to start. Use bolts, u-bolts or dowels to hold the tubes in place long enough to tack the joints. You may be able to use something like B-line also. I used spare pieces of B-line (slotted angle steel) for a few bicycle choppers and sissy bars. Good Luck!
1040933
I think this will be a try it and see answer.  Much of it will depend on your technique.  I have never not seen at least minimal mixing in a mixed bed column that did not have a physical separation.