While my knowledge base doesn't contain specific documentation on A-frame ladder safety, I can provide general safety guidance based on industry best practices.

To ensure safety when using A-frame ladders, focus on proper setup, safe climbing practices, and regular maintenance:

• Setup: Place the ladder on a stable, level surface. Ensure the ladder is fully opened and the spreaders are locked. Never set up a ladder on an unstable base.
• Climbing: Maintain three points of contact at all times (two hands and one foot, or two feet and one hand). Do not climb higher than the second step from the top. Avoid overreaching; instead, reposition the ladder.
• Maintenance: Regularly inspect the ladder for damage, such as loose or missing rungs, damaged side rails, or worn feet. Clean the ladder to remove any slippery substances. Remove damaged ladders from service.
• An employer shall ensure that a portable ladder is maintained in a safe condition and inspected before each use by a competent person to ensure it is safe to use.

[1] Following these precautions can significantly reduce the risk of falls and injuries when using A-frame ladders.