The guardian fall protection parapet clamp guardrail is an economical and easy to use system. An often overlooked option in the world of fall protection, guardrails and warning lines function to block workers from exposure to fall hazards, often entirely eliminating the need for other types of fall protection equipment. Each clamp is provided with a corresponding guardrail post, which is compatible with 2x4 in boards. This system can fit any parapet from 4 to 24 inches in width, and an entire system can be easily installed by one person, frequently without the need for ladders or scaffolding.