Under bridge hangers should be placed every how many feet?

Study for the BICSI OSP Design Test. Prepare using multiple choice questions, with hints and explanations to enhance understanding. Succeed in your exam journey!

The main idea is to keep the cable adequately supported so it doesn’t sag too much between attachments. When a cable runs under a bridge, hangers provide intermediate support to limit sag, maintain the required clearance from the bridge and road, and reduce movement from wind or vibrations. Placing hangers about eight feet apart strikes a balance: it keeps sag within safe limits and maintains clearance without adding excessive hardware or labor. If you spaced them closer, you'd raise cost with little practical benefit; if you spaced them farther apart, the cable could sag more than allowed, potentially contact the bridge or impair clearance and serviceability. In practice, eight feet is the standard spacing, though exact spacing can be adjusted for cable weight, allowable sag, temperature effects, and bridge geometry.