End ladder treads must be spaced to coincide with side ladder treads with a variation of how many inches?

The correct answer is that end ladder treads must be spaced to coincide with side ladder treads with a variation of 2 inches. This requirement is important for maintaining safety and consistency when using ladders.

When end treads are aligned with side treads, it helps ensure that users can ascend and descend the ladder safely without experiencing a misstep due to inconsistent spacing. Adjustable spacing between the treads is tolerated up to this 2-inch variation to account for any manufacturing discrepancies or alignment issues that might occur during installation.

This standard guarantees a safer working environment, as uneven rungs or treads can lead to falls or accidents. Therefore, adhering to the 2-inch variation is critical for compliance with safety regulations and best practices in ladder design and maintenance.