GB/T 47056-2026 Bamboo winding utility tunnel

GB/T 1447-2005 Fiber-reinforced plastics composites—Determination of tensile properties GB/T 1448-2005 Fiber-reinforced plastics composites—Determination of compressive properties GB/T 1463-2005 Test methods for density and relative density of fiber reinforced plastics GB/T 4380-2004 Assessment of departure from roundness—Two-and three-point methods GB/T 5352-1985 Test method for external loading properties of fiber-reinforced thermosetting plastic pipe by parallel-plate loading GB/T 5352-2005 Fiber-reinforced thermosetting plastic composites pipe—Determination for external loading properties by parallel-plate loading GB 8624-1997 Classification on burning behaviors for building materials GB 8624-2006 Classification for burning behavior of building materials and products GB 8624-2012 Classification for burning behavior of building materials and products GB 8624-2025 Classification for burning behavior of building materials and products GB/T 8626-1988 Test method of flammability for building materials GB/T 8626-2007 Test method of flammability for building materials GB/T 9978.1-2008 Fire-resistance tests—Elements of building construction—Part 1:General requirements GB 50838-2015 Technical code for urban utility tunnel engineering GB/T 8626-2026 Test method of flammability for building materials