What term describes materials that can be crumbled or pulverized with hand pressure when dry?

The term that describes materials that can be crumbled or pulverized with hand pressure when dry is "friable." This characteristic is significant in the context of asbestos as friable materials, such as certain types of asbestos insulation, pose a greater risk of releasing harmful fibers into the air when disturbed. This easily crumbled nature means that even minor activities, like maintenance or demolition, can lead to exposure if the materials are not properly managed.

The understanding of friability is crucial for asbestos handlers because it informs the safety precautions that need to be taken during removal or remediation efforts. Knowing whether a material is friable helps dictate the necessary protective measures to minimize the risk of airborne contaminants, thereby ensuring a safer work environment.