Scaffolds between 4 to 10 feet high with a minimum horizontal dimension of less than how many inches must have standard guardrails?

The requirement for scaffolds between 4 to 10 feet in height with a minimum horizontal dimension is that they must have standard guardrails if the horizontal dimension is less than 45 inches. This safety regulation is in place to prevent falls, which can result in serious injuries or fatalities in construction and other work environments where scaffolds are used. Guardrails act as a protective barrier that can help to keep workers safe by providing a physical structure that prevents them from falling off the edge of the scaffold.

The provision specifically targeting a horizontal dimension of less than 45 inches is due to the increased risk presented by narrower scaffolds, where individuals might be more likely to lose their balance or slip. The establishment of a height range (4 to 10 feet) also corresponds with common situations in construction where work is performed at elevated levels. The guardrails must be installed properly to meet safety standards and should be constructed to withstand certain forces that might occur during regular use.

This focus on building safety standards helps promote a culture of safety within the industry, ensuring that workers are protected while performing their duties.