| 摘要 |
A floor for a portable containment berm has an intermediate layer of flexible puncture-resistant material sandwiched between lower and upper sheets of flexible impervious material and at least one puncture-resistant and wear-resistant tread pad fixed to the top surface of the upper sheet of flexible impervious material. In one embodiment, the layer of puncture-resistant material and the sheets of impervious material are substantially coextensive and are welded in laminar relationship along their peripheries. In another embodiment, the intermediate layer of flexible puncture-resistant material includes at least two belts of flexible puncture-resistant material with the lower and upper sheets welded in laminar relationship along their peripheries and between each adjacent pair of belts. In either embodiment, the tread pads are welded to the top surface of the upper sheet of flexible impervious material in a configuration suitable to receive the wheels of a vehicle traversing the floor of the berm. |
