ASTM E661

ASTM E661 is the ASTM standard for evaluating the performance of wood and wood-based floor and roof sheathing under concentrated static and impact loads. It is used to help assess how these materials respond when force is applied at specific points, which is important for understanding structural behavior in service. By focusing on both static and impact loading, the standard supports more consistent product comparison, testing, and performance-based decision-making.

Purpose of ASTM E661

The purpose of ASTM E661 is to provide a standardized test method for measuring how wood and wood-based sheathing performs when subjected to concentrated loads. That makes it useful for checking how a panel or sheathing product may respond to localized forces rather than uniform loading. The standard gives manufacturers, laboratories, and specifiers a common technical basis for evaluating floor and roof sheathing materials in a consistent, repeatable way.

Common use cases of ASTM E661

ASTM E661 is commonly used in product testing, quality control, and compliance-related evaluations for wood and wood-based sheathing intended for floor and roof applications. It may be applied during development of structural panel products, comparison of competing materials, or verification of performance characteristics before market release. The standard is also useful in laboratory settings where concentrated static and impact response needs to be measured under controlled conditions.

Why ASTM E661 matters

ASTM E661 matters because concentrated loads can reveal performance characteristics that broader tests may not capture. Using a recognized ASTM standard helps improve consistency across testing programs and supports clearer product evaluation for procurement, engineering review, and compliance documentation. For wood and wood-based sheathing, that consistency can reduce uncertainty when comparing materials or checking whether a product meets expected performance for floor and roof use.

• Wood and wood-based sheathing performance
• Concentrated static load evaluation
• Impact load response assessment
• Floor and roof sheathing applications
• Repeatable laboratory testing