The CertainTeed 1 1/2" Drywall Suspension System offers a superior solution for drywall suspension systems Knurled face for easier screw installation. Expanded cross tee offering facilitates integration with Types F & G light fixtures. Covered by CertainTeed Suspension Systems 10-Year Limited Warranty. Web is stitched for added strength. Double web design for durability and strength. Cross tees feature staked-on end tabs for optimal tightness and ease of installation. Heavy duty load-bearing capabilities. Stepped-end design featured on cross tees. Utilizes G-40 hot-dipped galvanized construction for superior corrosion resistance (G-90 available) . Suitable for use in the following UL/ULC Fire Resistive Assemblies: D501, D502, D503, G041, G523, G524, G526, G527, G528, G529, G553, L502, L508, L513, L515, L525, L526, L529, P506, P508, P509, P510, P513, P514, P560 Metric Sizes available for integration with Gyptone BIG Boards.`