KS Series leapfrog leapfrog joints joints KS Series is the latest development of a new type of expansion joint products, it only deck pavement layer thickness can be achieved by a reliable anchor for bridge design and construction units provide a great convenience. At the same time it is a good waterproof, shock absorption, reasonable force, to the end of the beam gap construction error is not sensitive to long life, clean up the seam automatic garbage, less maintenance, and low cost. So this product available that have been widely praised in bridge design and construction units.