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Commercial Vent

Commercial Vent. Commercial Vent. Engine Company Commercial Vent Training Objectives Understand why an inspection hole is important. Understand the purpose of smoke indicator holes. How to utilize the 5 cut center rafter cut method.

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Commercial Vent

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  1. Commercial Vent

  2. Commercial Vent • Engine Company Commercial Vent Training • Objectives • Understand why an inspection hole is important. • Understand the purpose of smoke indicator holes. • How to utilize the 5 cut center rafter cut method. • This class is a basic overview to prepare for the hands on portion of this training.

  3. Commercial Vent • Engine Company Commercial Vent Training • Will utilize 1 saw. • Minimum of two personnel but three is preferred. • Officer (required) • Sawyer (required) • Lookout/Safety (optional but recommended)

  4. Commercial Vent • 5 Points of Inspection Hole • Determine the roof covering • Determine the roof decking • Determine the rafter direction • Determine conditions directly underneath • Establish the type of operations that will be accomplished

  5. Commercial Vent • Inspection Hole • This is a triangular cut with each side approximately 12”. • The first cut is 45 degrees to an outside wall.

  6. Commercial Vent Inspection hole

  7. Commercial Vent • Smoke Indicator Hole • Determine smoke and heat conditions underneath the vent team • Assists in determining the location of heat hole • Only large enough to fit handle of rubbish hook into

  8. Commercial Vent • 5 Cut Center Rafter Cut (5 Cut) • Simple to use and remember. • Identifies the structural members and allows for the maximum size of opening between members for heat hole/strip cut • The louvers do not fall into the ventilation opening.

  9. Commercial Vent • A single ventilation hole is a 5 cut. • When several 5 cuts are put together they are considered “with construction” or “against construction” “With Construction” “Against Construction”

  10. Commercial VentAgainst Construction

  11. Commercial VentWith Construction

  12. Commercial Vent • Vertically ventilating a commercial roof can be a very complex task. Utilizing Truck Companies is recommended when roof operations are needed on commercial roofs. • This training provides Engine Companies the knowledge and skills to vertically vent a commercial roof when no Truck resources are available or are delayed.

  13. Commercial Vent • Hands on training: • Chalk saw station • Rafter rolling, smoke indicator, and inspection hole station. • Full start to finish evolutions that bring it all together. • Questions? Contact: • Jason Konieczka Jason.Konieczka@TukwilaWA.gov • Ben Hayman Ben.Hayman@TukwilaWA.gov • Jimmy Webb Jwebb@kentfirerfa.org

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