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Purchase all 192 videos in the Essentials of Fire Fighting, 6th Edition Skills Video Series: https://www.ifsta.org/shop/essentials... Purchase the Essentials of Fire Fighting, 6th Edition Skill Sheet Handbook: https://www.ifsta.org/shop/essentials... This skill video demonstrates how to ventilate using a power saw. NOTE: Firefighters must note the wind direction prior to ventilation. 1. While on the ground, confirm the saw is working to ensure proper operation. CAUTION: The saw should NOT be running while ascending to roof. 2. Sound roof with tool. 3. Locate rafters/floor joists and check roof/floor for integrity. 4. Start saw and make the following cuts. a. First cut: Lengthwise away from firefighter, cutting from top to bottom b. Second cut: Horizontal, top working toward firefighter c. Third cut: Lengthwise closer to firefighter, cutting from top to bottom d. Fourth cut: Horizontal, bottom working toward firefighter 5. Maintain secure footing while cutting. 6. Lock off saw or use chain brake. 7. Use tool to open ventilation hole. 8. Ensure effectiveness of ventilation.