ICC-ES AC257
Full Name
ICC-ES AC257 – Acceptance Criteria for Corrosion-resistant Fasteners and Evaluation of Corrosion Effects of Wood Treatments
Scope
ICC-ES AC257 outlines the criteria for assessing the corrosion resistance of fasteners when exposed to treated wood, weather, and salt.
The scope of AC257 includes:
- Types of fasteners: it covers various types of fasteners, including nails, screws, bolts, washers, and anchors, made from different materials such as stainless steel, carbon steel with protective coatings, and other corrosion-resistant materials.
- Performance requirements: it defines the minimum performance requirements for corrosion resistance based on the specific exposure conditions and the type of wood treatment used.
- Test methods: it specifies the test methods for evaluating the corrosion resistance of fasteners under various corrosive environments, including accelerated laboratory tests and field exposure tests.
- Evaluation criteria: it provides guidelines for interpreting test results and determining the suitability of fasteners for use with specific types of treated wood and environmental conditions.
The primary purpose of AC257 is to ensure that fasteners used with treated wood can withstand the corrosive effects of the treatment chemicals, weather, and salt without degrading prematurely. This helps maintain the structural integrity and lifespan of constructions using treated wood.
Resources
Keywords
corrosion; fasteners; wood treatments; acceptance criteria; evaluation; corrosion resistance; test methods; stainless steel; carbon steel; protective coatings; exposure conditions; salt; weather