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 to identify any visible defects that could cause injury [1]. Look for issues like broken or missing rungs, split rails, or corrosion [2].
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) 7, 9.
3. Proper Placement and Angle: Ensure the ladder is placed on a stable and level surface [3]. 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 [3].