Is there a simpler, less costly method to provide additional external support to existing concrete structures?
Yes, this non-proprietary procedure is a related to steel plate bonding and is commonly called rebar stitching. It may often be an efficient alternative to glass or carbon fabric wrapping, but since no company is actively marketing it, often the structural engineer doesn’t even consider it. The repair is often fast, inexpensive and requires no special tools. Installation is straightforward. First, it is critical to know the depth of coverage of the existing steel so that the old reinforcement is not damaged. The engineer calculates a requirement for increased strength, estimates a safety factor and then creates a pattern of steel or FRP reinforcing bar to be installed. The contractor saw cuts channels at specified depths in the concrete surface, ties the bar together at intersections, then fills the channel with a structural grade epoxy adhesive. If the channel lies on a horizontal deck, the filling is by gravity, otherwise the channel may need to be sealed with a temporary overlying f
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