Profile: 3A Technologies is specialized in designing and manufacturing of spring hangers, pipe supports & their accessories. We offer a wide range of pipe hangers and their accessories. Variable load effort spring support (type F) is designed to support the piping upward, i.e. from below, directly from the base/floor, or supporting steel. An adjustment in height is available by turning the load column, and for fastening four holes are drilled at the base plate. Type G is generally formed by welding two standard variable spring supports back to back at the ends of a pair of channels.