Menu

Welcome

The Finest Supporting the Bravest!

The purpose of the Fire Mechanics Section is to promote standardization of fire apparatus and equipment preventative maintenance, improve safety standards and practices, promote workshops, conferences, and seminars related to the purposes of this Section, and to promote cost savings through standardization of building and equipment purchasing and maintenance.

RECENT FIRE MECHANIC NEWS

Posted: May 4, 2015

Staffing and Water Delivery

Richard Marinucci   Richard Marinucci

As I write this column, Spring Training is in full swing (pun intended). When you read this column, Major League Baseball will be a month or so into its regular season.

You are probably wondering what this has to do with moving water. Well, when I go to a major league ballgame, I notice that about halfway through the game the grounds crew races out onto the field with a hose. The purpose is to reset the infield for the rest of the game and minimize dust and such. There are between six and 10 people moving the hose onto the field and into position. They go quickly so that the game is not unduly delayed.

Water Delivery

Wouldn't it be nice if you had six to 10 people to move the hose around on a fire scene? Good luck with that one. But if we look at the example above, we can understand the reason for that number of people. The hose is heavy, and they have to be in a hurry so as to not impact the flow of the game. A cynical question might be to ask why that is more important than deploying hose during a true emergency. We know the answer to that, but maybe there are some things we can learn to better understand the challenges of delivering water under fire conditions.

Based on my rough calculations, there are approximately 5,887 cubic inches of water in 100 feet of 2½-inch hose. This translates to approximately 25 gallons of water. The weight of one gallon of water is about 8.33 pounds. That means that there are more than 200 pounds of water in the 100 feet of hose. This does not include the weight of the hose. So a 200-foot length of hose would be more than 400 pounds. That is a lot of mass to move in ideal conditions.

How often do you have ideal conditions? For the past few months, the cold and snow have added to the workload of deploying hose. Walking through a few feet of snow to get a line to the C side takes a lot of effort. Even without snow, the friction on the ground adds to the force required to move the line after it is filled with water. So to maneuver 200 feet of 2½-inch hose when it is charged requires whatever personnel you have to work with who have to move well more than 400 pounds plus additional friction from the ground or whatever may be adding to the challenge.

Though this background information may seem trivial to many, it offers some information to consider when selecting tactics and strategy. If water is your choice for extinguishment (as opposed to removing the oxygen or fuel), then the objective is to get the water to the base of the fire. It does no good to squirt smoke or pour water onto shingles or bricks. The water must reach the fire. This can happen by properly deploying the streams or waiting for the fire to reach stationary lines.

I have heard the axiom many times that if you have a big fire you need big water. This would be hard to dispute. But I would offer a couple of points for you to consider before you automatically or arbitrarily employ this tactic. First and foremost, train your personnel to recognize what truly is a big fire requiring the big guns. This is challenging for those who do not go to a lot of "big ones." It requires study of the trade and learning from others. It requires understanding the properties of water, fire flow, fire load, and building construction. It requires learning as much as possible from recent research conducted by the National Institute of Standards and Technology (NIST) and Underwriters Laboratories (UL). A review of the basics of fire science (physics and chemis

Read more
Posted: May 4, 2015

Nozzle Choices for Handlines

By Alan M. Petrillo

 

Equipment manufacturers have expanded their lines of handline nozzles, allowing firefighters more control over flow, pressure, and stream type.

Firefighters must get water on a fire as quickly and efficiently as possible. Manufacturers aim to accomplish that mission with a wide selection of nozzles.

Where Is the Bail?

Rod Carringer, chief marketing officer for Task Force Tips (TFT), says, "Everyone has a different opinion on operational procedures for fire flow," which means his company has developed a huge number of nozzles to meet firefighter needs. "Our catalog has nearly 2,000 handheld nozzle combinations that we produce," Carringer points out, "and the possible combinations run into 10,000 when we consider international standards, although 85 percent of our business is from the United States market."

Carringer says TFT introduced a new nozzle, the Impulse, at FDIC International 2015 last month that integrates a new valve control into its existing nozzle lines. "We've removed the traditional bail handle off the top of the nozzle and are using a trigger-style mechanism to control the valve," Carringer says. "We're integrating the ability to hang onto the nozzle at the pistol grip and trigger the stream with the same hand."

Task Force Tips has developed the Impulse, a nozzle that does away with the traditional bail handle and replaces it with a trigger-type mechanism to control the valve. (Photo courtesy of Task Force Tips
Task Force Tips has developed the Impulse, a nozzle that does away with the traditional bail handle and replaces it with a trigger-type mechanism to control the valve. (Photo courtesy of Task Force Tips.)

The Impulse currently is in prototype stage and field trials of the nozzle are progressing, Carringer says. Impulse will be available in automatic, fixed-gallonage, and selectable-gallonage nozzles, he adds.

Dual-pressure and low-pressure nozzles are the latest trends in handline nozzles, Carringer says. "A lot of departments are moving toward low-pressure nozzles, mostly to reduce the reaction the firefighter feels at the tip," he says. "In a straight stream, the difference in nozzle reaction at 100 pounds per square inch (psi) vs. 75 psi is a 13 percent reduction for the firefighter. It makes a difference over time if he's working on a ladder or by himself in a hallway."

There's a downside in dropping to 75 psi, though. "You give up reach and penetration," Carringer says. "It's the same volume of water coming out, but it's coming out slower. When you go down to 50 psi, you have a high volume of water but lose the punch of that stream to get to the back wall or the second floor of a structure."

Akron Brass Co. makes the HydroFX that can be used with its nozzles to detect inlet pressure at the nozzle and tie it into the flow rate, allowing the firefighter to have a visual indication of the flow. (Photo courtesy of Akron Brass Co
Akron Brass Co. makes the HydroFX that can be used with its nozzles to detect inlet pressure at the nozzle and tie it into the flow rate, allowing the firefighter to have a visual indication of the flow. (Photo courtesy of Akron Brass Co.)

Flow Indicator

Read more

Posted: May 4, 2015

Are You Ready for Highwater/Swiftwater Season?

Chris Mc Loone   Carl J. Haddon

Now that the seemingly endless snows of winter have ended, it appears that spring may have actually sprung. With the spring thaw comes runoff. With runoff comes a rise in creek, river, and lake levels.

Often the aforementioned are accompanied by flooding, which in many areas of the country (including my own) causes tones to drop for water rescue calls. As many of us know, moving water is a force of nature that rarely loses its battles.

I am still amazed by the number of firefighters I meet around the country who do not know how to swim. The ability to swim is rarely a condition of hire for a fire department. I am also astounded at the number of fire departments I encounter around the country that do not carry life jackets or personal flotation devices (PFDs) as part of their personal protective equipment (PPE) cadre. Many of us still rely on the ability to draft water for firefighting purposes. Whether we are drafting water from a pond, a lake, a creek, a river, or even a swimming pool, shouldn't we have some sort of PFD to help prevent the unthinkable should we accidently fall in, especially if we are in turnout gear?

Do you know what the average depth of running water needs to be for it to be able to wash your vehicle away and carry it downstream? The answer is 12 inches. Did you know that it takes less than 12 inches of running water to sweep you off of your feet and carry you downstream? I know this from personal experience, as I almost drowned on a call in 18 inches of cold rushing Rocky Mountain creek water some years ago. At the time, I didn't think a life jacket was called for. I do now.

TYPES OF LIFE JACKETS

When you think of a life jacket or PFD, you picture an orange inflatable jacket with white straps that you are required to wear when you rent a fishing boat or that sits beneath the seats of the harbor cruise boats when you are on vacation. Yes, those are typically U.S. Coast Guard-approved Type II Square Top Yoke standard duty life jackets. Are these life jackets good enough for use by on-duty rescue or emergency services personnel? No, they are not.

The U.S. Coast Guard recognizes four classifications of PFDs:

  • Type II: described above.
  • Type III: typically worn by water skiers, personal water craft pilots and passengers, and for paddle sports such as canoeing.
  • Type IV: throwable, such as handled seat cushions.
  • Type V: designed and rated for swiftwater and whitewater activities; also the classification for life jackets designed for swiftwater rescue work. They typically come with a number of features not found in recreational life jackets. Some of these features include a place to affix a blunt tipped rescue knife, zippered pockets for essential gear, and an emergency whistle. Some of the newer, better models include an integral web belt strap with a heavy duty D-ring on the back for tying rescuers off to rescue lines. These straps/belts always include a quick-release, high-strength buckle that allows rescuers to activate and jettison the connection should they become entangled or otherwise need to immediately disconnect from the rescue line in an emergency situation.

Do you know what type of PFDs you have in your department? I ask for the obvious reason but also because I recently came upon some new whitewater rescue kits (donated to our team by local la

Read more
Posted: May 4, 2015

Tanker Designs Reflect Expanding Roles

Tankers (tenders) are quickly taking on additional roles in fire operations, many of them being not only capable of supplying and shuttling large quantities of water, but also serving in the roles of pumpers and rescues.

Manufacturers report they are building more tankers that can be classified as multipurpose vehicles, and departments are using these multirole tankers to handle situations traditionally dealt with by other types of apparatus.

Increased Pump Sizes

Ken Sebo, pumper product manager for Pierce Manufacturing Inc., says in his 26 years with Pierce he's seen tankers evolve from vehicles for shuttling water-featuring large tanks, small pumps, and low side compartments-to rigs carrying similar-sized water tanks but much larger pumps, hand-line crosslays, hydraulic ladder racks, hydraulic folding tank racks, and high side compartment space that might include hydraulic rescue gear.

"We are seeing pump sizes of 1,500 to 2,000 gallons per minute (gpm)," Sebo says, "and they are going on both single-axle and tandem-axle tankers. The pump house on a tanker is getting to be the same as on a pumper, and now we are putting foam systems on about 75 percent of the tankers we build, with many of them being our Husky 12 foam system for Class A and B foams."

Ryan Slane, product manager for the pumper-tanker group at KME, agrees with Sebo's assessment of the increase in pump sizes on tankers. "The old-school tanker usually had a 500- or 750-gpm pump on it, usually to move water," Slane says, "but with the larger pump sizes of 1,500 gpm to 2,000 gpm, the tanker can take on the role of a pumper if the pumper is out of service. Essentially, a tanker outfitted like that would be a sort of reserve pumper, complete with all the preconnects on a traditional pumper."


The Waunakee (WI) Fire Department went to Pierce Manufacturing for this dry-side pumper-tanker on an International Navistar chassis, carrying a 500-gpm Waterous power takeoff pump and 1,800 gallons of water. The vehicle also has low crosslays, a Husky 12 foam system, and a Hercules CAFS. (Photo courtesy of Pierce Manufacturing Inc.)
The Waunakee (WI) Fire Department went to Pierce Manufacturing for this dry-side pumper-tanker on an International Navistar chassis, carrying a 500-gpm Waterous power takeoff pump and 1,800 gallons of water. The vehicle also has low crosslays, a Husky 12 foam system, and a Hercules CAFS. (Photo courtesy of Pierce Manufacturing Inc.)

The Ocean City (MD) Fire Department recently had KME build a pumper-tanker that would complement its four KME pumpers. Chris M. Shaffer, assistant chief of the career division at Ocean City, says the pumper-tanker carries 2,500 gallons of water, 25 gallons of Class A foam, 100 gallons of Class B foam, a Waterous Advantus 6 foam system, and a 2,000-gpm pump. Shaffer says the department replaced a 1985 pumper with a 750-gallon water tank and a refurbished 2,650-gallon tanker with the new KME pumper-tanker.

"We wanted more water but the same pump module and cab configuration as on our pumpers," Shaffer says. "So the pumper-tanker has five discharges in the hosebed with 200 feet of 2½-inch hose, 150 feet of two-inch, 200 feet of 2½-inch preconnected, and two preconnected 1¾-inch hoselines of 200 feet each."

Shaffer adds that the pumper-tanker carries 1,800 feet of five-inch large-diameter hose (LDH) in its low hosebed-68 inches off the ground-which

Read more
RSS
First45834584458545864588459045914592Last

Theme picker

Upcoming Events

Theme picker

Sponsors

Fire Mechanics Section Board

Chair

Posted: Oct 21, 2015

Chair

Elliot Courage
North Whatcom Fire & Rescue
Read more

Vice Chair

Posted: Oct 21, 2015

Vice Chair

Mike Smith 
Pierce County Fire District #5
Read more

Secretary

Posted: Oct 21, 2015

Secretary

Greg Bach
South Snohomish County Fire & Rescue
Read more

Director #1

Posted: Oct 21, 2015

Director #1

Doug Jones
South Kitsap Fire & Rescue
Read more

Director #2

Posted: Oct 21, 2015

Director #2

Paul Spencer 
Fire Fleet Maintenance LLC
Read more

Director #3

Posted: Oct 21, 2015

Director #3

Jim Morris
Mountain View Fire Department
Read more

Director #4

Posted: Oct 21, 2015

Director #4

Arnie Kuchta

Clark County Fire District 6

Read more

Director #6

Posted: Oct 21, 2015

Director #6

Brett Annear
Kitsap County Fire District 18
Read more

Director #5

Posted: Oct 21, 2015

Director #5

Jay Jacks
Camano Island Fire & Rescue
Read more

Legislative Representative

Posted: Oct 21, 2015

Legislative Representative

TBD
TBD
Read more

Immediate Past Chair

Posted: Oct 20, 2015

Immediate Past Chair

Brian Fortner
Graham Fire & Rescue

Read more
RSS

Theme picker

2020 CAR SHOW