At what maximum height should scaffolds not exceed the specified base width ratio?

The maximum height of scaffolds in relation to their base width is determined to ensure stability and safety while working at height. A ratio of 4:1 means that for every four units of height, there must be one unit of base width.

This ratio is significant because it helps prevent tipping and ensures that the scaffolding can withstand the forces applied to it, such as wind, load from workers and materials, and dynamic movements. As scaffolds exceed this height-to-width ratio, the likelihood of instability increases, which can lead to accidents and injuries.

Understanding this ratio is crucial for contractors and workers in maintaining safety standards on job sites, as well as for compliance with OSHA regulations that govern scaffolding. The other ratios, being larger, imply the scaffold could potentially reach unsafe heights relative to their base width, necessitating careful adherence to the 4:1 standard for safe operations.