Enclosures must be what?

Enclosures must be mechanically fastened to the substrate to ensure they provide a secure and effective barrier against lead dust and chips. This method of fastening guarantees stability and minimizes the risk of the enclosure becoming dislodged or damaged, which could expose occupants to hazardous lead conditions.

Mechanical fastening also ensures that the enclosure performs its intended function properly by preventing gaps or openings that could allow lead particles to escape. A well-secured enclosure is crucial in lead hazard control and helps in maintaining a safe environment for occupants.

Temporary installations or loose attachments can lead to potential safety hazards as they may not provide adequate protection over time. Additionally, painting over the enclosure could potentially mask any underlying issues with lead hazards rather than addressing them directly. Therefore, the requirement for enclosures to be mechanically fastened reflects the necessity for long-term safety and effectiveness in lead hazard management.