It is suitable for impact puncture test of asphalt and polymer roofing waterproof membrane.

GB/T 328.24-2007 Test Method for Waterproof Building Rolls Part 24: Impact Resistance of Asphalt and Polymer Waterproof Rolls.

1. Vertical drop height of drop hammer: (600+5)

2. Weight of drop hammer assembly: (1000+10)g

3. Puncture tool diameter (and counterweight ring):

10_ (7.5_weight ring) and 20_ (6_weight ring) respectively.

30_ (thick 4_counterweight ring), 40_ (none)

4. Pressure ring size and mass: inner diameter Φ 200mm, (5000 ± 50) g

5. Size of stainless steel plate: 300_x 300_x 10_

6. Size of polystyrene board: 300_x 300_x 50_