There are two types of slopes that exist on roofs and special attention should be taken:
Require emergency stop switches at the operator station or the motor
At heights greater than 10 feet, the fall protection requirement for workers on scaffolds is different from the general construction requirement at 6 feet or greater. 29CFR1926.451(g)(1). See the following video (1:28) for more.
OSHA requires a signal person when:
Each power tool has its own set of requirements for use, and some come with safeguards. For most PV systems, workers will use electric power tools, air-filled tools, hydraulic tools, and tools that require liquids such as gasoline. Good understanding of the hazards associated with the power source will reduce the number of potential incidents and injuries.
Personal protective equipment (PPE) protects worker dangers, such as falling items, unsecured materials, and loud noises, that can cause injury. Examples of PPE include:
Links
[1] https://www.osha.gov/video/shipyard_accidents/shipyard_accidents_video_transcript.html#v1_6