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Placement is due to the Neutral Axis. Here is the line wherever the forces transform from rigidity to compression. Concrete is quite stong in compression and very weak in tension. The stress power of concrete isn't even accounted for in concrete structure. The placement of rebar should be in http://codyjctjy.blogerus.com/21590562/the-basic-principles-of-concrete-spacer-in-knee


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