... Composition: Core materials: cement, EPS, and fly ash core Surface materials: fiber reinforced calcium silicone board or cement calcium silicone board2. ... X 610mm X (50, 75, 100, 120,150,180mm) fiber cement board on both sides: 5mm, 6mm, 8mm 3. Usage: ... seismic and impact resistance Largest span and height thin webbed wall Most civilized, environmental, high efficiency construction. Best regards ...