ICC-ES AC223
Full Name
ICC-ES AC223 – Acceptance Criteria for Two-part Polyurethane Adhesives Used to Attach Gypsum Board to Wood Framing
Scope
ICC-ES AC223 outlines the acceptance criteria for evaluating two-part polyurethane adhesives specifically designed for attaching gypsum board to wood framing in construction. The criteria focus on ensuring the adhesive’s performance, durability, and safety in this application.
Key areas covered by AC223 include:
- Material properties: defining the acceptable chemical composition and physical properties of the two-part polyurethane adhesive components, ensuring they meet specific requirements for bonding strength, curing time, and flexibility.
- Performance testing: outlining standardized testing methods to evaluate the adhesive’s performance under various conditions, including:
- Bond strength: assessing the adhesive’s ability to resist separation between the gypsum board and wood framing under different loads and environmental conditions.
- Shear strength: evaluating the adhesive’s resistance to lateral forces that could cause the gypsum board to slide along the wood framing.
- Durability: testing the adhesive’s long-term performance under exposure to moisture, temperature fluctuations, and other environmental factors.
- Application requirements: specifying the recommended procedures for preparing the wood framing and gypsum board surfaces, mixing the adhesive components, and applying the adhesive to ensure proper bonding.
- Safety considerations: addressing any potential health and safety hazards associated with the adhesive’s use, including recommended precautions during handling and application.
By adhering to AC223, manufacturers can demonstrate that their two-part polyurethane adhesives meet the necessary performance and safety standards for attaching gypsum board to wood framing. This provides confidence to building officials, contractors, and homeowners that the adhesive will create a strong and durable bond, contributing to the overall structural integrity and longevity of the building.
Resources
Keywords
two-part polyurethane adhesives; gypsum board; wood framing; acceptance criteria; bond strength; shear strength; durability; moisture resistance; temperature fluctuations; application; surface preparation; mixing; health and safety