Here is an EzyStrut Stainless Steel U Bolt being used to clamp down a large diameter pipe onto an I-Beam. In this case, Hex Nuts are used both above and below the hole in the beam, to help prevent any movement in the bolt. It is possible to use these bolts to either clamp down or hang pipes in a saddle type fashion, depending on your project's needs. You can also combine them with other types of beam clamp if needed.
U Bolts for pipes can be supplied in either hot dip galvanised or stainless steel, and normally to suit pipe diameters from 21mm, through to 630mm, however, larger bolts can also be arranged if needed.