Filter Blankets for Rock Channel Protection. 3 ASTM D 4533. 5 ASTM D 4751. 6 ASTM D 4491. 7 ASTM D 4355.
All minimum strengths shown are average roll minimum values in the weakest principal direction.
The fabric shall be free of any treatment which might significantly alter its physical properties. During the shipment and storage, the fabric shall be wrapped in a heavy-duty protective covering to protect it from direct sunlight, dirt, dust and other debris. For fabric Types A, B and C, the manufacturer shall submit a certification with each shipment of material stating that it meets specification requirements. For Type D material, the manufacturer shall submit certified test data to cover each shipment of material. 712.10 Prefabricated Edge Drain .