Where must riser clamps be placed in relation to offsets in the standpipe?

Riser clamps serve a vital function in ensuring the stability and support of riser pipes, particularly in systems with offsets. The correct placement of riser clamps is essential for effective load distribution and preventing stress on the pipes, which can lead to failures.

Placing riser clamps on both sides of the bend is important because it provides support at both points where the direction of the pipe changes. This helps to distribute any forces acting on the pipe uniformly, preventing excessive movement or vibration at the offset, which can otherwise lead to damage over time. By securing the pipe on both sides of the bend, you are ensuring that the integrity of the piping system is maintained and that there is no undue strain on any particular section of the riser.

The other options do not provide the necessary support to the entire offset area, which can lead to structural issues if not properly managed. For example, placing clamps only above or below the offset doesn’t provide balanced support for the change in direction, leaving the pipe vulnerable to bending or flexing at the offset. Only placing clamps above and below every floor also doesn't specifically address the points of change in direction at the offset itself.

Thus, the requirement to place riser clamps on both sides of the bend promotes a robust and