Keep in mind that concrete is very strong in compression but weak in tension. Steel reinforcements are added to concrete to carry the tension loads and prevent the concrete from pulling apart. Look where the concrete is most likely to pull apart and add steel to those locations, (most likely where it is bending in tension and around the perimeters).
A pier will likely be carrying a vertical compression load pushing it down into the ground rather than any vertical tension trying to pull it out of the ground. So there should be little need for vertical reinforcement, mostly for horizontal reinforcements and just enough vertical supports to keep the horizontal rings in position during concrete pouring.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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