PrintDifferent slopes for rooftop PV and fall protection
There are two types of slopes that exist on roofs, and special attention should be taken:
- Steep-slope roof = a roof having a slope greater than 4’ in 12’ (vertical to horizontal)
- Low-slope roof = a roof having a slope less than or equal to 4’ in 12’ (vertical to horizontal)
Conveyors and hoists
Require emergency stop switches at the operator station or the motor
Scaffolding
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, as mentioned in section 29CFR1926.451(g)(1). See the following video for more.
Video: Scaffolding Collapse, Welder Falls (1:27)
A welder was erecting scaffolding inside a vessel that was under construction. The welder attached the scaffolding to the bulkhead using brackets clips that are temporarily tack welded in place. The welder was trained and certified to install and weld these type of clips. After he finished assembling the scaffold structure with temporary welds, the welder walked out onto the scaffold boards. One of the bracket clips failed, causing him to fall 18 feet to the deck below. He died from massive injuries. (MUSIC)
What went wrong?
The bracket clips which require full welds were only tack welded. The welder should not have climbed onto the scaffolding with tack welded clips. Welds must be inspected before a scaffolding structure is placed into use. The welder was wearing a body harness, but did not tie off. Always wear a full body harness and tie off at heights of five feet or more. When accessing scaffolds, ladders should extend three feet above scaffold boards. (MUSIC)
Signal Persons
OSHA requires a signal person when:
- Point of operation (load travel or load placement) is not in full view of operator
- During crane travel, the direction of travel is obstructed
- The operator or person handling the load determines that it is needed because of site specific safety concern s
Hand and power tools
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)
Personal protective equipment (PPE) protects worker dangers, such as falling items, unsecured materials, and loud noises, that can cause injury. Examples of PPE include:
- Safety glasses
- Face shields for eye and face safety
- Hard hats for head protection
- Steel-toed safety shoes for foot protection
- Armor for hands and arms, such as gloves
- Hearing protection devices, such as earplugs or earmuffs