ASTM C32 is the ASTM standard specification for sewer and manhole brick made from clay or shale. It provides a technical basis for identifying brick intended for below-grade sewer and manhole construction, where durable masonry units are important for long-term service. By defining the product category and associated requirements, the standard helps buyers, engineers, and suppliers communicate clearly about material expectations and suitability for this type of work.

What is ASTM C32?

ASTM C32 is a product specification focused on sewer and manhole brick manufactured from clay or shale. Its purpose is to establish a common reference for the brick used in these utility structures, supporting consistent product selection and evaluation. As an ASTM standard, it is used to align material expectations during procurement, quality control, and compliance review. In practice, ASTM C32 helps define the technical context for brick intended for sewer-related masonry applications.

Where is ASTM C32 used?

This standard is commonly used in the specification and purchase of brick for sewer structures and manholes built with clay- or shale-based masonry units. It is relevant to contractors, utility owners, manufacturers, inspectors, and specifiers working on underground infrastructure. ASTM C32 is typically referenced when describing the brick requirements for these installations, helping ensure the selected units match the intended application and construction documents.

Why is ASTM C32 important?

ASTM C32 matters because it supports consistent expectations for a specialized brick product used in demanding underground conditions. A clear standard can reduce ambiguity in procurement, improve quality control, and help verify that supplied brick meets the intended specification. For projects involving sewer and manhole construction, this kind of reference is useful for compliance review, product comparison, and risk reduction. ASTM C32 also helps streamline communication between specifiers and suppliers.

• Sewer and manhole brick specification
• Clay or shale masonry units
• Material selection and procurement reference
• Quality control and compliance support