Trench drains used in chemical or corrosive conditions shall be made of ___________________.

Trench drains that are utilized in chemical or corrosive environments must be made of stainless steel due to its remarkable resistance to corrosion and chemicals. Stainless steel is ideal for such applications because it maintains its structural integrity and does not degrade when exposed to harsh substances, which is paramount in settings like laboratories, manufacturing plants, or areas dealing with hazardous materials.

The properties of stainless steel ensure that it can withstand aggressive cleaning agents, acids, and other corrosive compounds without rusting or losing functionality, making it a reliable choice for long-term use. Additionally, stainless steel is strong enough to handle the physical stresses that trench drains may encounter, such as weight loads from vehicles or heavy equipment.

In contrast, materials like cast iron and concrete can corrode or become damaged in harsh chemical environments, and while plastic might resist certain chemicals, it may not be strong enough or durable enough to handle heavy loads typically associated with trench drains. Thus, the choice of stainless steel is aligned with both durability and safety in corrosive applications.