I have a contractor that wants to use a two piece stirrup for a grade beam wall. The approach they want to use is to place U-bars with double 135 degree hooks on both ends. For the top cap they want to use a bar with one 135 degree hook and one 90 degree hook. Their hook lengths are...
My company has some older concrete secondary containment structures for oily water tanks located in the Northwest. The concrete has shrinkage cracks that have been expanded do to freeze thaw cycles. The cracks are still relative thin but we want to take corrective actions before they get worse...
