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Intermediate SFFMA Objectives: 8-02.01 8-02.05 8Hrs received Slide 2 SFFMA Objectives Covered 8-02.01 Trainee shall demonstrate the use of different types of power saws and jack hammers. 8-02.02 Trainee shall identify the different types of roofs, demonstrate the techniques used to ventilate each type, and identify the necessary precautions 8-02.03 Trainee shall identify the size and location of an opening for ventilation, and the precautions to be taken during ventilation 8-02.04 Trainee shall demonstrate the removal of skylights, scuttle covers, and other covers on rooftops. 8-02.05 Trainee shall demonstrate the types of equipment used for forced mechanical ventilation. Slide 3 Selecting Place to Ventilate Ideal situation one with as much information as possible about fire, building, occupancy Many factors have bearing on where to ventilate Firefighter I113 (Continued) Slide 4 Selecting Place to Ventilate Many considerations before ventilating building Firefighter I114 Slide 5 DISCUSSION QUESTION Why is it important for ventilation to be coordinated with other operations such as fire attack? Firefighter I115 Slide 6 Vertical Ventilation Opening roof/existing roof openings for allowing heated gases, smoke to escape Firefighters must understand basic types, designs of roofs Firefighter I116 (Continued) Slide 7 Vertical Ventilation Firefighters must know how roofs in the response areas are constructed Firefighter I117 (Continued) Slide 8 Vertical Ventilation Preincident Inspections Identify New construction projects Existing construction Use of lightweight building materials Information that can alert firefighters Firefighter I118 Slide 9 Likelihood of Roof Collapse During Vertical Ventilation Based on Volume of fire How long fire has been burning Type of construction Level of protection Load on roof Firefighter I119 Slide 10 Responsibilities During Vertical Ventilation Officer in Charge Determine it can be done safely, effectively Consider age, type of construction Consider location, duration, extent of fire Observe safety precautions Firefighter I1110 (Continued) Slide 11 Responsibilities During Vertical Ventilation Officer in Charge Identify escape routes Select place to ventilate Move personnel, tools to roof Firefighter I1111 Slide 12 Responsibilities During Vertical Ventilation Leader on Roof Ensure roof safe to operate on Ensure only required openings made Direct efforts to minimize secondary damage Coordinate crews efforts with firefighters inside building Firefighter I1112 (Continued) Slide 13 Responsibilities During Vertical Ventilation Leader on Roof Ensure safety of all personnel Ensure team leaves roof as soon as assignment completed Firefighter I1113 Slide 14 Safety Precautions During Vertical Ventilation Check wind direction with relation to exposures Work with wind at back/side to provide protection while cutting Note existence of roof obstructions/ excessive weight on roof Firefighter I1114 (Continued) Slide 15 Safety Precautions During Vertical Ventilation Provide secondary means of escape for crews Firefighter I1115 (Continued) Slide 16 Safety Precautions During Vertical Ventilation Ensure main structural components not cut while creating opening Guard opening to prevent personnel falling into it Evacuate roof promptly when ventilation complete Firefighter I1116 (Continued) Slide 17 Safety Precautions During Vertical Ventilation Use lifelines, roof ladders, other means to prevent sliding/falling Make sure roof ladder (if used) firmly secured over roofs peak Exercise caution when working around electric, guy wires Firefighter I1117 (Continued) Slide 18 Safety Precautions During Vertical Ventilation Ensure all personnel on roof wear full PPE including SCBA Keep other firefighters out of range of those swinging axes, operating saws Caution axe users to be aware of overhead obstructions Firefighter I1118 (Continued) Slide 19 Safety Precautions During Vertical Ventilation Start power tools on ground to ensure operation; shut off before hoisting/ carrying to roof Extend ladders 3-5 rungs above roof line, secure ladder When operating from aerial ladder platforms, floor of platform even with/ slightly above roof level Firefighter I1119 (Continued) Slide 20 Safety Precautions During Vertical Ventilation Check roof for structural integrity before stepping on, continue sounding throughout operation Firefighter I1120 (Continued) Slide 21 Safety Precautions During Vertical Ventilation Always walk on bearing walls, strongest points of roof structure Ensure ceilings punched through to enhance ventilation Firefighter I1121 Slide 22 Unsafe Roof Warning Signs Melting asphalt Spongy Roof Smoke coming from roof Fire coming from roof Firefighter I1122 Slide 23 DISCUSSION QUESTION What should you do if you are assigned to ventilate a roof and find warning signs present? Firefighter I1123 Slide 24 Roof Coverings Part of roof exposed to weather Types Some susceptible to ignition from sparks, burning embers; others not Some have coating of insulating material Firefighter I1124 Slide 25 Existing Roof Openings Sometimes used for vertical ventilation Rarely in best location/large enough Usually supplement cut holes Firefighter I1125 (Continued) Slide 26 Existing Roof Openings Scuttle hatches Skylights Monitors Ventilating shafts Penthouse/bulkhead doors Firefighter I1126 Slide 27 General Ventilation Considerations for Roofs Square/rectangular opening easier to cut, easier to repair One large opening better than several small Firefighter I1127 Slide 28 Flat Roofs Commonly found on commercial, industrial, apartment buildings Common on many single- family residences Firefighter I1128 (Continued) Slide 29 Flat Roofs May/may not have slight slope for drainage Frequently penetrated by chimneys, vent pipes, etc. May be surrounded and/or divided by parapets Firefighter I1129 (Continued) Slide 30 Flat Roofs May support water tanks, HVAC equipment, etc. Structural part Decking Construction materials determine equipment necessary to ventilate Firefighter I1130 Slide 31 Pitched Roofs Among most common are those elevated in center along ridge with roof deck sloping down to eaves along roof edges Firefighter I1131 (Continued) Slide 32 Pitched Roofs Shed roofs Pitched along one edge with deck sloping down to eaves at opposite edge Most involve rafters/trusses Have more pronounced downward slope than flat; may be steep Firefighter I1132 (Continued) Slide 33 Pitched Roofs Procedures for opening similar to flat roofs; precautions must be taken to prevent slipping Some types may require different opening techniques Firefighter I1133 Slide 34 Arched Roofs Can span large open areas unsupported by pillars/posts One type uses bowstring trusses Firefighter I1134 (Continued) Slide 35 Arched Roofs Lamella or trussless arched roofs Firefighter I1135 (Continued) Slide 36 Arched Roofs Procedures for cutting ventilation openings same as flat/pitched except no ridge to hook roof ladders; curvature of roof prevents roof ladders from lying flat Firefighter I1136 Slide 37 Precast Concrete Roofs Can be fabricated off-site Available in many shapes, sizes, designs Some use lightweight material Firefighter I1137 (Continued) Slide 38 Precast Concrete Roofs Lightweight usually finished with roofing felt and mopping of hot tar Extremely difficult to break through Existing openings should be used for ventilation on heavy roofs Firefighter I1138 Slide 39 Poured-In Place Concrete Roofs Some lightweight concrete roof decks poured in place over permanent form boards, steel roof decking, paper-backed mesh, or metal rib lath Firefighter I1139 (Continued) Slide 40 Poured-In Place Concrete Roofs Relatively easy to penetrate Some can be penetrated with hammer-head pick or power saw with concrete blade Heavier roofs require jackhammer/ diamond-tipped chain saw Firefighter I1140 Slide 41 Metal Roofs Made from several different kinds of metal; constructed in many styles Firefighter I1141 (Continued) Slide 42 Metal Roofs Light-gauge steel roof decks can be supported on steel frameworks/laid over existing roof Light-gauge cold-formed steel sheets used primarily for industrial buildings Firefighter I1142 (Continued) Slide 43 Metal Roofs Except when covered with lightweight concrete, seldom covered with roofing material Metal cutting tools/power saws with metal cutting blades must be used to open Firefighter I1143 (Continued) Slide 44 Metal Roofs Often penetrated by roof openings Older buildings may have roofs made of large pieces of sheet metal laid over skip sheathing Firefighter I1144 Slide 45 DISCUSSION QUESTION What are some examples of occupancies in your area? How would these occupancies need to be addressed when ventilating the building? Firefighter I1145 Slide 46 Trench Ventilation (Strip Ventilation) Used to stop spread of fire in long, narrow structure Firefighter I1146 (Continued) Slide 47 Trench Ventilation (Strip Ventilation) Performed by cutting large opening at least 4 feet (1.2 m) wide extending from one exterior wall to opposite exterior wall Often, large ventilation opening is cut between trench cut and fire Firefighter I1147 Slide 48 Mechanical Ventilation Forced ventilation is accomplished using mechanical ventilation Tools to complete mechanical ventilation: Fans Gas Fans Electric Fans Blowers