Piping systems shall be substantially supported and protected against physical damage and excessive stresses arising from settlement, vibration, expansion, contraction or exposure to fire. The supports shall be protected against exposure to fire by one of the following:
- Draining liquid away from the piping system at a minimum slope of not less than 1 percent.
- Providing protection with a fire-resistance rating of not less than 2 hours.
- Other approved methods.