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Many fire departments use only the 2-inch handline; some use smaller lines as well. These make-ups are normally appliance stored in a tray or racking. This is a pre-93 building with a 65 psi standpipe residual pressure. The Cleveland/Carmel make-up is by far the best for high rise, limited space, deployment. The primary restriction is the water supply. The Los Angeles (CA) Fire Department (a highly respected department that has had its share of high-rise fires) uses a high-rise attack line made up of lightweight 2-inch hose with a fixed-gallonage combination nozzle, and has been very successful with that combination. Remember, the 65-psi number is based on a 500-gpm flow. The stowage system and make-up can have a bearing on the speed of deployment. Type 3 A 183-gpm flow with a 92-psi residual pressure was enough to develop a workable fire suppressing stream with plenty left over. It offers superb flow characteristics but is heavy when fully charged and extremely difficult to manoeuver. Pic:Highrisefirefighting.co.uk A common denominator in all of these tests was the fact that most of the tips that allowed higher flows also took higher standpipe pressures to create the minimum 30-psi nozzle pressures. : Flaked (zig-zaged) Dutch rolled 45mm Hose: Is the normal hose taken inside a building. FDC Tandem Pumping: High-Rise Building Fire Pumping Operations, Improper Staging Can Set a High-Rise Operation Up for Failure, Standpipe Systems: Stretching from the Street. It is up to each department to decide what to use. Carmel (or Cleveland pack) is an evolution of an American 'wildfire' hose deployment technique. Example: The Fitzgerald hotel in Las Vegas is a 36-story building and has a system pressure of 250 psi based on NFPA codes. Carmel (or Cleveland pack) is an evolution of an American 'wildfire' hose deployment technique. There are those who think that combination nozzles are not good for high-rise applications because of the potential for debris from the standpipe system to clog the nozzle. I am not sure if this number reflects a certain size handline, but the bottom line is that 35 psi more is now available to deliver more water. When the fire department pumping apparatus take over the system, they continue pumping the system at the system pressure; however, unlike the building pump, the fire department units have the ability to maintain the pressure with throttle control whereas the building pumps do not. Photo :Glen Ellman These make-ups are normally appliance stored in a tray or racking. demanding, and many participants perform at the elite level. Of course, it also has the option of bringing up 2-inch if needed. An optimal nozzle pressure of 50 psi works well; a slightly lower or slightly higher nozzle pressure produced from a system pressure may also work. It is important to note that when there is any restriction placed on the supply to any 45mm hose (which is to be expected at High rise incidents) its flow characteristics, especially its high levels of frictional loss, will count against it. It is frequently used at Forestry, Marine and Ship fires. Our tests were done with specific makes of hose and nozzles. Secondary to this, the hose should be able to be deployed and used as efficiently as possible. It is a fixed-gallonage, 150-gpm at 50-psi combination nozzle used with a break-apart nozzle valve in conjunction with a 15/16-inch tip. These tests are as close to realistic as it gets when demonstrating what a specific standpipe pressure can deliver without actually using a high-rise system itself. Now, look at the 100 psi/500 gpm stats. Developing better responses to fires in tower bocks and high-rise buildings. Photo: Greg Stone Engine Company Operations: Analyzing the High-Rise Handline, Spartan Recalls Select Emergency Rescue Transport Vehicles Equipped with Electronic Stability Control, Two-Alarm Fire Hits Famous Philadelphia (PA) Cheesesteak Restaurant, One Hospitalized in CO Apartment Fire, Gas Leak, Firefighter, Civilian Treated for Smoke Inhalation after Walla Walla (WA) House Fire, Exploding Liquid Oxygen Tanks Shuts Down Seattle (WA) Highways, Watch: Detroit (MI) Firefighters Dig Out Firefighter Trapped in House Fire Collapse, Building Suffers Partial Collapse After Early Morning Fire in Tulsa (OK), Video Shows Moment Los Angeles County Firefighters Rescue Member from YMCA Fire, UT Firefighter/Paramedic Dies in Off-Duty Fall, Huntsville (AL) Fire Cadet Dies after Training Exercise, More Flooding, Rescues in Area Around St. Louis (MO). Know your buildings. Hose make-up (how its laid ) prior to deployment is an import consideration. Photo: NZFS training Program Therefore, if you flow less than 500 gpm, which you would have with the 2-inch handline, the residual pressure will be higher because the pump will not adjust to the lower flow. The code states that a minimum hydrostatic pressure test of 200 psi must be obtained for systems with system pressures up to 150 psi. The time needed to actually get water on the fire is delayed because of the logistics of getting people to the fire floor. All others were various lengths. Type 1 hoses have no external treatments applied. Longer hose lines consisting of purely 45mm hose will lead to very significant restrictions in flow rates. Some departments, however, have successfully fought high-rise fires with combination nozzles; therefore, this test will include one. with a rope, hit a 165-pound steel beam 5 feet with an 8lb sledgehammer, pick up a pressurised hose, carry it 30 feet and hit a target Hampshire (USA), the test used to be as follows: The test is conducted wearing a fire coat, helmet, gloves, air The only pressure limitations in an operation are the maximum allowed pressures of the hose and water-delivery equipment, which is set by the manufacturers themselves. These problems can be there whether the system is supplied directly from a municipal or a property water system or indirectly from city water to an in-house pump and then through the standpipe system. To verify these engine company flow tests, the same tests were done on a 65 psi/500 gpm building system. All streams had adequate performance capable of suppressing fire. Four common methods are : A 30-psi nozzle pressure was considered to be the minimum to create a minimum workable stream. Remember, the purpose of this article is to show several choices. Your tests should involve any equipment that you feel should be evaluated. Photo: NZFS training Program The following nozzle combinations were used: You should not be surprised to see the flows increase significantly with the 2-inch for obvious reasons. This equates to a 265 gallons-per-minute (gpm) flow, thus the 65-psi standpipe residual pressure. Some manufacturers have increased the size while still calling it 1 -inch hose. Three In common use in the UK is 45mm (1 3/4 inch) and (notionally) 70mm (actually 64mm 2 1/2 inch). The flow tests revealed that most streams had at least a minimum interior attack flow for a room or small square footage-type fire (note that I said minimum); however, almost half lacked sufficient reach and velocity to be very effective. He has been in the fire service since 1981 and is author of Layin the Big Lines and produced the first in a series of videos on large-flow water delivery. The one exception to this rule was the large bore tip nozzle used with the 2-inch line. Example: Lets use the pre-1993/65-psi residual pressure for this example. This link will take you away from www.highrisefire.co.uk Please be aware that we do not necessarily endorse or support the views, opinions or expressions of this site. Just remember, safety comes first. Recent trials of some lightweight type 2 hose (HFRS / GMFRS 2010) have proven that the specific hose used was not durable enough for the expected internal fire environment (suffering significant wear and tear). This hose offers the optimum performance given the restricted environment it needs to work in. : This is not necessarily a bad thing. The low-pressure nozzles can be smooth bore or combination. In tests and trials it has proven extremely beneficial both on terms of hose management and deployment speed. But remember, the trade-off is heavier hose. There are other factors besides the plumbed fire protection system to consider for the flow requirements needed from the handline. Rolled make-up systems have a proven record, but its short-coming is that it has to be deployed (Hand rolled). Dutch rolled, where the hose is double back on itself and then rolled towards the two couplings is a quick and convenient hose make up & deployment but it requires conciderable space to deploy (it is thrown) making it less than ideal foir high rise corridors and lobbies. See the 40yrd dash page for an idea of a 51mm hose offers a good balance of hydraulic performance (frictional loss). The stowage system and make-up can have a bearing on the speed of deployment. Besides the low-system pressure potential, other restrictions can include elevation loss, plumbing friction loss, pressure-regulating devices, pressure-reducing valves, and pressure-restricting devices. Repeated tests and trials in the high-rise environment have directed UK-FRS to 51/52mm hose. Its 30-psi nozzle pressure started at 40-psi standpipe pressure. Recent research in the UK has identified that the prefered deployment for hose is Cleveland/Carmel carried over the shoulder (in the American style). conditions. tank and ankle weights and to "pass" all the elements must be completed non-stop in 11.5 minutes. I encourage fire departments to do similar tests. This link will take you away from www.highrisefire.co.uk Please be aware that we do not necessarily endorse or support the views, opinions or expressions of this site. A single 25m length of 45mm hose, at a tactical flow rate of 500l/m can experience a frictional loss of 1.5 Bar. Recent innovation has lead to the creation of hose pack holders to assist with quick and effective deployment. The British standard details 3 Types (categories) of fire hose: A high-rise water delivery operation, because of the restrictions in the building system itself, can significantly increase the required pressures needed just to get to the handline evolution to create a sufficient fire stream. (4-5) An assortment of gauges as well as a flow meter assured test accuracy. with the water jet, stair or hill work - equivalent to 5/6 stories, pulling up a 45-pound coil of fire hose hand over hand with a The 2-inch hose was indeed in 50-foot sections. //-->. The cutoff point for the 30 psi nozzle pressure averaged around the 60- to 70-psi standpipe pressure. Unfortunately most have not been assessed to BS 6391, Photo: Niedner. Using an engine company instead of a building system was considered to be accurate enough to prove the theory. This requires space, which can be a serious restriction in high rise corridors and lobbies. 45mm Hose: Is the normal hose taken inside a building. What about developing flows inside a structure using its building fire protection system for a part of the water-delivery evolution? This usually consisted of 2 lengths of 45mm hose, flaked in a tray in the pump (rear) locker, and a pre-connected branch. In tests and trials it has proven extremely beneficial both on terms of hose management and deployment speed. The commonest make-up methods on UK appliances is one of the rolled methods; either conventionally rolled (over the female coupling) or dutch rolled (where the hose is double back on itself and then rolled towards the two couplings). These nozzles were chosen because of their low-pressure operation characteristics and the ability to flush debris. Rolled make-up systems have a proven record, but its short-coming is that it has to be deployed (Hand rolled). The "instantaneous" couplings on each end (one male, one female) are also to a British Standard, BS336. Restricted space tests have been carried out and this method seems to provide the simplest and quickest deployment in areas such as corridors, stairwells and lobbies. The worst-case scenario was the 65 psi/500 gpm system using the 1.88-inch hose. The USA/Canadian Fire Fighting Physical is a series of tests that firemen and firewomen must undertake to join the firefighting service. 38mm Hose: Is a narrow bore hose that is light and very maneuverable. This link will take you away from www.highrisefire.co.uk Please be aware that we do not necessarily endorse or support the views, opinions and expressions of this site ! Although not right on the money, the engine company tests were close enough to illustrate the residual pressure potential that a high-rise system has to flow water. Carmel / Cleveland lay (Often called Roundabout hose load or Carmel lay or a part of a Cleveland load, which includes a branch) This mode allows fire crews to adapt to situations where a standard hallway extension is not desirable. Internationally there are many Hose manufactures that are making lightweight and ultra durable hose, ideal for High rise fire fighting. The hose extension is made by grasping the extension flag which is located midpoint on the hose line and extending the hose line away from the hose cabinet. Starting life as long strips of leather sown or riveted together, it has evolved into the efficient and effective high-tech hose now used by modern Fire service's Ensure that the selected method of make-up is approved by the hose manufacturer and that it places no undue loads or stresses on it . The first flow tests used the discharge of an engine to simulate a standpipe outlet and have been done in many of the classes that teach high-rise handlines. The flow tests showed the capabilities of a 2-inch handline using 800 hose 150-foot-long hose in the low pressure range, 30 to 100 psi, as well as the higher 100 to 150 range that you expect to see in newer systems and systems properly pumped by fire department apparatus. These are not best suited to high rise deployment. Together with usability and flexibility within manual handling (crews need to be able to safely advance and retreat. Photo : HoseEco UK Ltd. The key to moving adequate water in a high-rise/low-pressure system is to have a handline that offers the required water in an effective firefighting stream with the least amount of pressure lossin other words, low-pressure nozzles and hose with low friction-loss characteristics. Please be aware that we do not necessarily endorse or support the views, opinions or expressions of any other site. training program. Although using lightweight hoses is very beneficial, the hose does need to be able to perform its primary function and withstand the riggers of the high rise fire enviroment. This should give a ballpark indication on the standpipe residual pressure of the building system and the pressure requirements of the handline itself. Although using lightweight hoses is very beneficial, the hose does need to be able to perform its primary function and withstand the riggers of the high rise fire enviroment. He has authored numerous articles for fire trade magazines. These make-ups are normally appliance stored in a tray or racking. This requires space, which can be a serious restriction in high rise corridors and lobbies. (2) Fire department pumping apparatus can increase the pressure in the systems, sometimes significantly. Restricted space tests have been carried out and this method seems to provide the simplest and quickest deployment in areas such as corridors, stairwells and lobbies. Together with usability and flexibility within manual handling (crews need to be able to safely advance and retreat. Dutch rolled Longer hose lines consisting of purely 45mm hose will lead to very significant restrictions in flow rates. hoses have an external elastomeric coating or has a covering applied to, or been incorporated in, the reinforcement to give the hoses very low absorption of liquids and high resistance to abrasion and heat. 2-Inch Hose. To ensure the accuracy of these tests, calibrated inline and pitot pressure gauges were used to measure the standpipe, nozzle base pressure, and exit or nozzle pressures. 20 lbs Hose Selection /* Link Bottom Left */ STAIRWAY EXTENSION: In the stairway evolution the hose plays out from the pack while the firefighter walks from the water source up to the fire floor. Remember, the AHJ can be you! 1.88-inch and 2-inch Hose. TWO WAY EXTENSION: This evolution is used to advance hose simultaneously in two different directions.