Give me 3 key safety reminders for using a-frame ladders

Here are three key safety reminders for using A-frame ladders:

1. Inspect Before Use: Always inspect the ladder before each use for any visible defects such as broken or missing rungs, split rails, or corrosion 2, 5. If defects are found, immediately tag the ladder as "Dangerous: Do Not Use" and remove it from service until it is repaired or replaced 2, 5.
2. Maintain Three-Point Contact: When climbing or descending, always face the ladder and maintain three points of contact (two hands and one foot, or two feet and one hand) to ensure stability 7, 9, 15. Avoid carrying objects that could cause you to lose balance 5, 11.
3. Proper Placement and Angle: Ensure the ladder is placed on a stable and level surface 10, 11. For non-self-supporting ladders, use an angle where the horizontal distance from the top support to the foot of the ladder is approximately one-quarter of the working length of the ladder [1]. If the ladder is placed in an area where it could be displaced by traffic or workplace activities, secure it to prevent accidental movement or use a barricade 10, 11.