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Posted: May 18, 2017

Auxiliary Braking: Picking the Best of All Goods

FAMA Forum   By Roger Lackore

So many times in life we are forced to pick the “least of all evils.” So, it is nice when we at the Fire Apparatus Manufacturers’ Association (FAMA) can discuss a topic where you can choose the best from a list of “all goods.” This is the case when it comes to selecting an auxiliary braking system for your next fire apparatus.

National Fire Protection Association (NFPA) 1901, Standard for Automotive Fire Apparatus, requires that any apparatus with a greater than 33,000-pound gross vehicle weight rating (GVWR) must be equipped with an auxiliary braking system. This means a system that assists in stopping the apparatus above and beyond the action of the service brakes located at the wheel ends. Auxiliary braking can be accomplished through the action of the engine, the transmission, or other means acting on the apparatus drivetrain.

Overview

Modern fire apparatus, like every other heavy on-road vehicle, are equipped with a service braking system that uses friction to slow the vehicle. This friction comes from physical contact between a consumable material (brake pads or shoes) and a mechanical device (brake drums or rotors). The contact force is created by either hydraulic force (smaller vehicles) or compressed air (heavy vehicles). The air pressure in heavy vehicles is produced by a compressor driven by the engine.

The downside of friction braking systems is that they create heat that must be dissipated. The heavier the vehicle and the faster the stop, the more heat is created. In heavy braking situations, this heat can cause the brakes to fade or lose their braking power. This can occur if the brakes are used frequently or consistently down long grades. In extreme braking situations, the components can get hot enough to damage the brakes.

Auxiliary braking systems supplement the service brakes, increasing the stopping power and reducing the likelihood that the service brakes will overheat. The NFPA Apparatus Committee felt strongly that this capability was important in fire apparatus, which are more likely to brake hard and brake frequently. This is the reason it began requiring auxiliary braking systems on large fire apparatus. In addition to these safety benefits, appropriate use of an auxiliary braking system will extend the life of the service brakes, reducing cost and frequency of maintenance.

Common Systems

Commercially available auxiliary braking systems all use some method other than mechanical friction to help slow a vehicle. They also all work by creating a braking force on the vehicle driveline, which in turn transfers force to the tires and then to the road. They all generate heat, but they all control the dissipation of that heat. There are four categories of auxiliary braking systems currently available on fire apparatus:

  • Electromagnetic retarders.
  • Exhaust brakes.
  • Engine compression brakes.
  • Transmission retarders.

Electromagnetic Retarders

Electromagnetic retarders create their stopping power using the force that can be generated by a magnetic field. You can experience this force if you bring the north or south poles of two magnets together. In vehicle applications, the magnetic fields are created by electricity flowing through a set of coils. The initial electric power to generate the field comes from the vehicle batteries and i

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Posted: May 18, 2017

Quick-Attack Pumpers Continue to Enjoy Resurgence in Popularity

By Alan M. Petrillo

1 Summit Fire Apparatus built this quick-attack truck for the Western Holmes (OH) Fire Department on a Ford F-550 chassis. (Photos 1 and 2 courtesy of Summit Fire Apparatus.)
1 Summit Fire Apparatus built this quick-attack truck for the Western Holmes (OH) Fire Department on a Ford F-550 chassis. (Photos 1 and 2 courtesy of Summit Fire Apparatus.)

They go by different names - fast-attack units, mini pumpers, quick-attack pumpers - but they share similar features and missions.

Typically, these vehicles have short wheelbases; have gross vehicle weight ratings (GVWR) under 20,000 pounds; carry a modest-sized pump, around 300 gallons of water, and perhaps some foam; and are charged with fire knockdown duties and sometimes even rescue operations.

Mini and Midi Pumpers

2 The Jacksonville (MD) Fire Department went to Summit Fire Apparatus for this fast-attack/brush truck built on a Ford F-550 chassis and adapted to Super Single tires and rims
2 The Jacksonville (MD) Fire Department went to Summit Fire Apparatus for this fast-attack/brush truck built on a Ford F-550 chassis and adapted to Super Single tires and rims.

Joe Messmer, president of Summit Fire Apparatus, says that departments coming to Summit say they want smaller pumpers with the ability to get into and out of areas where larger vehicles might have trouble. “They want vehicles that are able to get in quicker, and their firefighters often don’t want to drive large trucks,” Messmer says. “They tell us they want a vehicle that’s more agile and able to get around better in tighter areas.”

Summit recently built a quick-attack mini pumper for the Reedy (WV) Fire Department, Messmer notes, on a Ford F-550 4x4 chassis with a Powerstroke 6.7-liter V8 turbo diesel engine, seating for six firefighters, a Waterous 1,250-gallon-per-minute (gpm) power takeoff (PTO) pump, and a 300-gallon polypropylene water tank with an integral 30-gallon foam tank. Summit also built a mini pumper for the South New Berlin (OH) Fire Department on a Ford F-550 that seats six firefighters and carries a Hale 1,000-gpm pump and a 250-gallon water tank. Both rigs have Robinson roll-up doors and a transverse compartment behind the crew cab.

3 Midwest Fire Equipment built this fast-attack pumper for the Whiteford Township (MI) Fire Department on a Ford F-550 crew cab chassis with Super Single rims and tires and a four-inch lift kit. (Photos 3 and 4 courtesy of Midwest Fire Equipment.)
3 Midwest Fire Equipment built this fast-attack pumper for the Whiteford Township (MI) Fire Department on a Ford F-550 crew cab chassis with Super Single rims and tires and a four-inch lift kit. (Photos 3 and 4 courtesy of Midwest Fire Equipment.)

As a slight step up from the typical mini pumper, Messmer says Summit built a “midi pumper” for the Clinton Warren (OH) Fire Department on a GM 5500 four-door chassis with an emergency medical services (EMS) compartment in the crew cab. The rig has a Hale 1,000-gpm midship pump, a 300-gallon UPF Poly water tank, a Hale 2.1A FoamLogix foam system, al

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Posted: May 18, 2017

Quick-Attack Pumpers Continue to Enjoy Resurgence in Popularity

By Alan M. Petrillo

1 Summit Fire Apparatus built this quick-attack truck for the Western Holmes (OH) Fire Department on a Ford F-550 chassis. (Photos 1 and 2 courtesy of Summit Fire Apparatus.)
1 Summit Fire Apparatus built this quick-attack truck for the Western Holmes (OH) Fire Department on a Ford F-550 chassis. (Photos 1 and 2 courtesy of Summit Fire Apparatus.)

They go by different names - fast-attack units, mini pumpers, quick-attack pumpers - but they share similar features and missions.

Typically, these vehicles have short wheelbases; have gross vehicle weight ratings (GVWR) under 20,000 pounds; carry a modest-sized pump, around 300 gallons of water, and perhaps some foam; and are charged with fire knockdown duties and sometimes even rescue operations.

Mini and Midi Pumpers

2 The Jacksonville (MD) Fire Department went to Summit Fire Apparatus for this fast-attack/brush truck built on a Ford F-550 chassis and adapted to Super Single tires and rims
2 The Jacksonville (MD) Fire Department went to Summit Fire Apparatus for this fast-attack/brush truck built on a Ford F-550 chassis and adapted to Super Single tires and rims.

Joe Messmer, president of Summit Fire Apparatus, says that departments coming to Summit say they want smaller pumpers with the ability to get into and out of areas where larger vehicles might have trouble. “They want vehicles that are able to get in quicker, and their firefighters often don’t want to drive large trucks,” Messmer says. “They tell us they want a vehicle that’s more agile and able to get around better in tighter areas.”

Summit recently built a quick-attack mini pumper for the Reedy (WV) Fire Department, Messmer notes, on a Ford F-550 4x4 chassis with a Powerstroke 6.7-liter V8 turbo diesel engine, seating for six firefighters, a Waterous 1,250-gallon-per-minute (gpm) power takeoff (PTO) pump, and a 300-gallon polypropylene water tank with an integral 30-gallon foam tank. Summit also built a mini pumper for the South New Berlin (OH) Fire Department on a Ford F-550 that seats six firefighters and carries a Hale 1,000-gpm pump and a 250-gallon water tank. Both rigs have Robinson roll-up doors and a transverse compartment behind the crew cab.

3 Midwest Fire Equipment built this fast-attack pumper for the Whiteford Township (MI) Fire Department on a Ford F-550 crew cab chassis with Super Single rims and tires and a four-inch lift kit. (Photos 3 and 4 courtesy of Midwest Fire Equipment.)
3 Midwest Fire Equipment built this fast-attack pumper for the Whiteford Township (MI) Fire Department on a Ford F-550 crew cab chassis with Super Single rims and tires and a four-inch lift kit. (Photos 3 and 4 courtesy of Midwest Fire Equipment.)

As a slight step up from the typical mini pumper, Messmer says Summit built a “midi pumper” for the Clinton Warren (OH) Fire Department on a GM 5500 four-door chassis with an emergency medical services (EMS) compartment in the crew cab. The rig has a Hale 1,000-gpm midship pump, a 300-gallon UPF Poly water tank, a Hale 2.1A FoamLogix foam system, al

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Posted: May 18, 2017

Quick-Attack Pumpers Continue to Enjoy Resurgence in Popularity

By Alan M. Petrillo

1 Summit Fire Apparatus built this quick-attack truck for the Western Holmes (OH) Fire Department on a Ford F-550 chassis. (Photos 1 and 2 courtesy of Summit Fire Apparatus.)
1 Summit Fire Apparatus built this quick-attack truck for the Western Holmes (OH) Fire Department on a Ford F-550 chassis. (Photos 1 and 2 courtesy of Summit Fire Apparatus.)

They go by different names - fast-attack units, mini pumpers, quick-attack pumpers - but they share similar features and missions.

Typically, these vehicles have short wheelbases; have gross vehicle weight ratings (GVWR) under 20,000 pounds; carry a modest-sized pump, around 300 gallons of water, and perhaps some foam; and are charged with fire knockdown duties and sometimes even rescue operations.

Mini and Midi Pumpers

2 The Jacksonville (MD) Fire Department went to Summit Fire Apparatus for this fast-attack/brush truck built on a Ford F-550 chassis and adapted to Super Single tires and rims
2 The Jacksonville (MD) Fire Department went to Summit Fire Apparatus for this fast-attack/brush truck built on a Ford F-550 chassis and adapted to Super Single tires and rims.

Joe Messmer, president of Summit Fire Apparatus, says that departments coming to Summit say they want smaller pumpers with the ability to get into and out of areas where larger vehicles might have trouble. “They want vehicles that are able to get in quicker, and their firefighters often don’t want to drive large trucks,” Messmer says. “They tell us they want a vehicle that’s more agile and able to get around better in tighter areas.”

Summit recently built a quick-attack mini pumper for the Reedy (WV) Fire Department, Messmer notes, on a Ford F-550 4x4 chassis with a Powerstroke 6.7-liter V8 turbo diesel engine, seating for six firefighters, a Waterous 1,250-gallon-per-minute (gpm) power takeoff (PTO) pump, and a 300-gallon polypropylene water tank with an integral 30-gallon foam tank. Summit also built a mini pumper for the South New Berlin (OH) Fire Department on a Ford F-550 that seats six firefighters and carries a Hale 1,000-gpm pump and a 250-gallon water tank. Both rigs have Robinson roll-up doors and a transverse compartment behind the crew cab.

3 Midwest Fire Equipment built this fast-attack pumper for the Whiteford Township (MI) Fire Department on a Ford F-550 crew cab chassis with Super Single rims and tires and a four-inch lift kit. (Photos 3 and 4 courtesy of Midwest Fire Equipment.)
3 Midwest Fire Equipment built this fast-attack pumper for the Whiteford Township (MI) Fire Department on a Ford F-550 crew cab chassis with Super Single rims and tires and a four-inch lift kit. (Photos 3 and 4 courtesy of Midwest Fire Equipment.)

As a slight step up from the typical mini pumper, Messmer says Summit built a “midi pumper” for the Clinton Warren (OH) Fire Department on a GM 5500 four-door chassis with an emergency medical services (EMS) compartment in the crew cab. The rig has a Hale 1,000-gpm midship pump, a 300-gallon UPF Poly water tank, a Hale 2.1A FoamLogix foam system, al

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Posted: May 18, 2017

Keep an Eye on Hoods

Chris Mc Loone   Chris Mc Loone

I often like to look back on the way things were when I joined the fire company in 1993 and the way they are now.

Sometimes I get crotchety and lament the changes that have occurred over the years, and other times I am impressed by our consistency and stability over time. One thing that hasn’t changed is the fire company’s commitment to outfitting its firefighters with personal protective equipment (PPE) that is compliant with the most current National Fire Protection Association (NFPA) standards. Looking back, I was only in “loaner” gear for a relatively short period of time before being upgraded to brand new gear. You could always tell who the Weldon rookies were back then because we all had black gear while the rest of the fire company had tan turnout gear. Today, a required part of our PPE ensemble when going to Firefigher I is a Nomex hood. Back then though, helmet ear flaps were considered sufficient protection. I learned all about letting your ears warn you of an impending flashover. Back then, our hoods were there to protect us from burns. They covered areas we couldn’t cover with helmet ear flaps or putting up our collars. They’ve remained relatively unchanged through the years. That began to change last year.

As PPE manufacturers have continued to innovate our turnout gear, Nomex hood design has remained the same for the most part. Coverage areas might be different from hood to hood. And, what were once only one color are now available in a variety of colors. But, we began to see an evolution in these hoods last year at FDIC International 2016 when new hoods, then coined “barrier hoods,” came to the market. These hoods not only protect wearers from burns, but now they are also filtering out harmful carcinogenic particulates. The number of companies offering these types of hoods increased this year.

I recently returned from the Fire Industry Education Research Organization (F.I.E.R.O.) PPE Symposium, and these hoods dominated much of the conversation. Discussion regarding putting some sort of barrier in the hood to repel carcinogens began in 2013. Development for these new types of hoods was rapid, with prototypes designed and ultimately products brought to the market. This year, the NFPA gets into the hood arena with the newest edition of NFPA 1971, Standard on Protective Ensembles for Structural Fire Fighting and Proximity Fire Fighting. Contained therein will be criteria for barrier hoods, or particulate blocking hoods. With the 2018 edition of NPFA 1971 expected to be issued this month, new test methods and criteria will be used to define a particulate blocking hood. Keep in mind, particulate blocking hoods are optional components of the overall PPE ensemble. That said, if your department does choose to invest in these hoods, the hoods must still meet ordinary hood requirements.

So, what can we expect this month with the new version and what is yet to come? These hoods are in their infancy. NFPA 1971 (2018 ed.) will establish requirements for particulate blocking hoods to be compliant with the standard. There is still much work and research to be done on these hoods to ensure their barrier properties do not impact a firefighter’s thermal awareness. Additionally, questions remain about the durability of the barriers as well as how effectively the hoods can be cleaned. With NFPA 1971 being released this month, expect compliant hoods to be available within three to six months.

Although particulate barrier blocking hoods were discussed at length during the symposium, they were but a s

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