Hey everyone, I am installing a 6' vinyl fence around my pool after I pour new concrete around the pool area. I will be digging the holes to insert the treated 4x4's to accept the the vinyl post sleeves. My question is, would it reduce the possibility of the concrete cracking if I were to bend 3/8" rebar into 6" squares and place them around the 4x4 treated posts prior to pouring the concrete? I have heard that concrete has a tendancy to crack when pouring around a post. {from the post to the edge of the concrete} I will have a dstance of 6 to 12 in. from the post to the edge.