There are some important tips and advice’s that will help you better understand and use the trick to tie reinforcement bar with binding wire.

Do not tie reinforcing bars at each intersection because tying does not affect the strength of the finished structure. It would be better to tie every fourth or fifth intersection.
The distance of ties should be controlled with the bar size while assembling reinforcing bars in position for slab reinforcing. When you are assembling wall reinforcing bars in position, there should be done adequate gapping for ties to resist shifting of the bars as concrete is being arranged.
Toward preassembled mats, the adequate number of bar intersections must be tied so that the mats become inflexible enough for handling.

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