B-1.1, r. 2 - Construction Code

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8.112. Aboveground piping must be installed in such manner as to reduce vibrations and stress to a minimum and not come directly into contact with the ground.
The use of expansion shields to suspend aboveground piping is prohibited in lightweight concrete or gypsum assemblies.
Aboveground piping must also be protected by barriers in areas subject to vehicle impact.
O.C. 220-2007, s. 1.