Christopher Naum

Structural Anatomy of Buildingsonfire - Chris Naum's blog examines the role of building construction and fire behavior in the stability of structures where firefighters battle fires and rescue occupants

  • Residential Pre-Arrival: What are your Considerations?

    by Christopher Naum - Thursday November 24, 2011
    A video clip of a structure fire occurring in a single family residential occupancy shows, in the first few frames a back draft occurring per-arrival of fire services. It’s apparent there is a developing and progressing fire in the Charlie division which may have originated in the, or vicinity of the detached garage (B-C) which had a breezeway connected to the main house. The large volume...
  • Checking Your Compass

    by Christopher Naum - Thursday November 24, 2011
    How much thought and efforts do you place on looking beyond the suggested "routiness" of your response operations? You know, the redundancy, routiness and frequency of typical calls you run, the types of fire you engage in and the manner in which your company interfaces with the balance of the alarm response when working a job or multiple alarm operation. We talk about nothing being routine, yet...
  • Reported Structure Fire with Trapped Occupants: Are YOU Combat Ready?

    by Christopher Naum - Saturday November 12, 2011
    Just another day… On any given day, at any given time in the streets, buildings and occupancies that comprise the fabric of our communities and ultimately our response district and first-due areas; the citizens we protect go about their daily lives and activities as we go about ours. On any given day, at any given time the typical radio transmissions are intervened with a...
  • Commercials - Got Fire; Anticipate Collapse

    by Christopher Naum - Friday November 11, 2011
    A recent video clip making its way around the cyber fireground clearly depicted a very close-call and resulting near miss event to four firefighters at a four alarm fire involving a commercial building that housed an established insulation manufacturer and installation contractor. The video shows within a very compressed time frame, the progression of rapidly deteriorating interior conditions...
  • Remembering Hackensack and Gloucester

    by Christopher Naum - Friday November 4, 2011
    As we approach the July 4th holiday period, two significant LODD incidents previously occurred during this time frame that hold a number of lessons learned related to command management, operations, building construction principles and building performance, fire behavior and the ever present dangers of the job.   Take the opportunity to learn more about these events, and expand your...
  • Remembering Hackensack and Gloucester

    by Christopher Naum - Friday July 1, 2011
    As we approach the July 4th holiday period, two significant LODD incidents previously occurred during this time frame that hold a number of lessons learned related to command management, operations, building construction principles and building performance, fire behavior and the ever present dangers of the job.   Take the opportunity to learn more about these events, and expand your...
  • National Firefighter Near-Miss Reporting System; Untapped Resource

    by Christopher Naum - Friday July 1, 2011
    Have you heard about the National Firefighter Near-Miss Reporting System (NMRS)? Have you used the NMRS Reports , or submitted a near miss event? Did you know there is a wealth of resources available on the NMRS web site or that there is a Report of the week that is published weekly?   If not, this is a great opportunity to learn about this national fire service program...
  • What's on Your Radar Screen?

    by Christopher Naum - Friday May 6, 2011
    The following list is but a modest cross section of pertinent information or focus areas today’s Firefighter, Company or Command Officer MUST be knowledgeable in, have insights and proficiency based technical skills to function with a level of competencies demanded in  today’s  fire service. If these are not on your radar screen or you haven’t got a blip of a clue what they’re about...
  • Prince William County (VA) Fire Rescue Kyle Wilson LODD 2007; Is This on Your Radar Screen?

    by Christopher Naum - Sunday April 17, 2011
    The Prince William County (VA) Department of Fire and Rescue published a comprehensive line of duty death report for Technician I Kyle R. Wilson on Saturday, January 26, 2008. Have your read it? Technician I Wilson was the first line of duty death in the Department’s 41-year history. The Department shared the LODD Investigative Report to honor Kyle, and in an effort to reduce and prevent...
  • Analytical Study Reveals Patterns in U.S Firefighter Fatalities

    by Christopher Naum - Sunday April 17, 2011
    While the number of structural fires in the United States continues to decline, firefighter line of duty deaths (LODD) do not exhibit the same rate of proportion decline. A review of both NFPA and USFA Firefighter LODD annual reports, statistics and retrospective studies and analysis suggest a noted change in the adverse trends noted for a number of previous years, but we are lagging in...
  • Chesapeake (VA) Auto Parts Store Roof Collapse Double LODD 1996

    by Christopher Naum - Saturday March 19, 2011
    Fifteen years ago, on March 18, 1996, two firefighters were killed in Chesapeake, Virginia when they became trapped by a rapidly spreading fire in an auto parts store and a pre-engineered wood truss roof assembly collapsed on them. The cause of the fire was an electrical short created when a power company truck working in the rear of the building drove away with its boom in an elevated...
  • The Ides of March

    by Christopher Naum - Wednesday March 9, 2011
    Here are five (5) NIOSH Firefighter LODD Event report summaries for incidents that occurred in the March 4th through the 8th time frame in the years 1998, 2001, 2002, 2008. Take the time to look over the event summaries, discuss and comment on the factors that lead to the events and the recommendations formulated from the subsequent investigations. Take the opportunity to identify the common...
  • Engineered Floor I-Joists and Firefighter Safety: Basic Insights

    by Christopher Naum - Saturday February 26, 2011
                    The following videos provide some Basic insights on Engineered Floor I-Joists and Firefighter Safety. The first two video reports are a few years old, but provide some good visual and narrative insights into the current building construction trends, operational limitations and fireground tactical safety considerations.   Take the time to review...
  • Multiple Alarm Operations with Wind Driven Fire: Are you prepared?

    by Christopher Naum - Tuesday February 22, 2011
    The five alarm fire that ran through a seven story multiple occupancy (MO) apartment building in the Flatbush Section in the Borough of Brooklyn (NYC) this past weekend considerably challenged operating companies of the FDNY as the fire was fueled and spread in rapid success due to significant wind conditions compounded by news reports that a door to the fire compartment was left open, thus...
  • Gypsum Board Ceiling Systems and Firefigher Safety

    by Christopher Naum - Saturday February 19, 2011
    The recent events in Los Angeles and the line of duty death of veteran LAFD Firefighter Glenn Allen who died Friday from injuries he sustained when a ceiling collapsed on him in a house fire late Wednesday night in the Hollywood Hills again gives us pause to reflect on the demands and hazards present at all fire suppression operations in buildings on fire. The past two months have borne...
  • Modular Construction and Operational Impacts

    by Christopher Naum - Friday January 28, 2011
    Modular homes are built using an engineered approach to produce buildings in a more efficient and cost effect method that can deliver lower home prices per square foot. Instead of the traditional stick-built, on-site construction methods, most of the work is pre-fabricated at an off-site climate controlled factory. As each sub-section is finished it is transported to the building site and...
  • Remembering FDNY Black Sunday 2005

    by Christopher Naum - Sunday January 23, 2011
    Take the time to read both NIOSH reports and remember the sacrafice… Three veteran FDNY firefighters died in the LODD in Brooklyn, New York and the Bronx on Sunday January 23, 2005, a day that has become known as “Black Sunday” and called one of the saddest in fire department history. Two firefighters were killed and four others were badly hurt when they were forced to jump from a...
  • Chicago: Anatomy of a Building and its Collapse

    by Christopher Naum - Tuesday December 28, 2010
    The tragic events in the City of Chicago on Wednesday December 22, 2010, when Chicago Firefighter Edward J. Stringer – Engine Co.63 and Firefighter/EMT Corey D. Ankum, Truck Co.34 were killed in the line of duty while operating at a structure fire in an abandoned one-story brick building in the 1700 block of East 75th Street on the City’s South side, exemplifies the demands, challenges...
  • Remembering Brackenridge 1991 Floor Collapse and LODD

    by Christopher Naum - Tuesday December 21, 2010
    Remembering Brackenridge, Pennsylvania December 20, 1991: Four Firefighters Killed, Trapped by Floor Collapse Four volunteer firefighters died when they were trapped by a partial floor collapse during a structure fire in Brackenridge, Pennsylvania, on the morning of December 20, 1991. All four were members of a mutual aid truck company that had responded to the early morning incident and were...
  • Tactical Patience and the New Considerations of Ventilation on Fire Behavior in Legacy and Contemporary Residential Construction

    by Christopher Naum - Sunday December 19, 2010
    Impact of Ventilation on Fire Behavior in Legacy and Contemporary Residential Construction For many of you that have been following my writings and perspectives on building construction, firefighting, command risk management and operational excellence for firefighter safety have long recognized that I have been promoting and advocating the fact the fireground is changining, our stratgies and...
  • Near-Misses, Maydays and Floor Collapses

    by Christopher Naum - Friday December 17, 2010
    If you’ve been paying attention to the latest news and on the job reports these past few days, you may have noticed there’s been an emerging trend evident in near miss, close-calls resulting in maydays, RIT deployments and self-rescue resulting from floor compromise and floor collapse.  As I was doing some research and posting links related to the first one or two events on Buildingsonfire...
  • Ordinary and Heavy Timber Constructed Occupancies Training Download

    by Christopher Naum - Saturday December 4, 2010
    Operational Safety Considerations at Ordinary and Heavy Timber Constructed Occupancies  Building Construction Type III and IV Training Materials for the Fire Service In support of the anniversary of the Worcester Cold Storage Warehouse Fire, I'm posting a resource download that can be used for awareness training on Building Construction Type III and IV occupancies. This program was...
  • Operational Integrity and Command Fortitude

    by Christopher Naum - Friday December 3, 2010
    Today December 3, 2010 marks the 11th anniversary of the Worcester Cold Storage Warehouse fire that resulted in the line of duty death of six courages brother firefighters.     For those of you who remember this event, take the time to reflect and honor the sacrifice made this day; to those of you who have not heard about the fire before- take the time to learn about the incident, the...
  • Occupancy Performance and Tactical Patience

    by Christopher Naum - Friday October 22, 2010
    Today’s incident demands on the fireground are unlike those of the recent past, requiring incident commanders and commanding officers to have increased technical knowledge of building construction with a heightened sensitivity to fire behavior, a focus on operational structural stability and considerations related to occupancy risk versus the occupancy type. There is an immediate need for...
  • Rules of Engagement 2010

    by Christopher Naum - Thursday September 2, 2010
    Rules of Engagement Project; Increasing Firefighter Survival Developed by the Safety, Health and Survival Section International Association of Fire Chiefs The International Association of Fire Chiefs (IAFC) is committed to reducing firefighter fatalities and injuries.  As part of that effort the nearly 1,000 member Safety, Health and Survival Section of the IAFC has developed the...
  • Remembrance FDNY; Brooklyn Box 3300 August 2, 1978

    by Christopher Naum - Sunday August 1, 2010
    Waldbaum’s Supermarket Fire and Collapse FDNY 1978   The Waldbaum Super market fire, Brooklyn, New York occurred on August 2, 1978, thirty two years ago. Six firefighters died in the line of duty when the roof of a burning Brooklyn supermarket collapsed, plunging 12 firefighters into the flames. The fire began in a hallway near the compressor room as crews were renovating the store, and...
  • 3*4*3 Reports

    by Christopher Naum - Saturday July 31, 2010
    I recently posted an article on CommandSafety.com that addressed a series of Major Influencing Fire Service Reports, Issues and Focus areas that should be on your radar screen . This was also the theme at the premiere of Taking it to the Streets on Fire Fighter Netcast.com . As an emerging, practicing or upward mobile fire officer, commander or leader; those are but a few key...
  • In Search of Tactical Patience

    by Christopher Naum - Friday June 18, 2010
    Today commemorates the anniversary of the Sofa Superstore fire in Charleston, South Carolina, in which nine firefighters lost their lives while engaged in aggressive interior operations at a commercial building occupied and operating as a furniture store and warehouse. On the evening of June 18, 2007, units from the Charleston Fire Department responded to a fire at the Sofa Super...
  • From Waldbaum’s to Hackensack- Worcester to Charleston; Legacies for Operational Safety

    by Christopher Naum - Friday May 21, 2010
    From Waldbaum’s to Hackensack- Worcester to Charleston; Legacies for Operational Safety I started this article with the title “From Waldbaum’s to Hackensack- Worcester to Charleston; Legacies for Operational Safety”; I still find it surprising during my travels around the country lecturing and presenting programs on building construction, that when the audience was asked, “What do the...
  • The Predictability of Performance In Structures during Suppression Operations

    by Christopher Naum - Wednesday March 17, 2010
    The essence of fire service suppression operations is predicated upon the deployment and application of water as an extinguishing agent, in sufficient quantities, location and duration to extinguish a fire within an enclosed structural compartment. The universal engine company correlation of: “putting the wet stuff on the red stuff” is fundamental to structural fire suppression operations...
  • Risk versus Gain: Operations in Vacant or Abandoned Structures

    by Christopher Naum - Sunday March 14, 2010
    Risk versus Gain: Operations in Vacant or Abandoned Structures Fire Fighter LODD after Being Trapped in a Roof Collapse During Overhaul of a Vacant/Abandoned Building. NIOSH recently published a report on a 2008 LODD that occurred in a vacant/ abandoned building. NIOSH Report F2008-0037. The full report is available HERE. Let’s look at some insights and overviews of that report...
  • What do you know about Building Construction?

    by Christopher Naum - Sunday March 14, 2010
    What do you know about Building Construction? Regardless of your rank or time in your organization or company; what do YOU know about building construction? It’s a loaded question to say the least, since the characteristic replies run the gamete of what one thinks they know versus what they actually know . I had the opportunity to lecture in different regions around the country over the past...
  • RACE: Responsibility, Accountability, Complacency, Expectations

    by Christopher Naum - Monday February 1, 2010
    By now many of you may have seen the reports making their way around the internet circuit relating to the regrettable circumstances in DeKalb County, Georgia.  If you haven’t caught up on the incident particulars then check out these links, HERE , HERE and HERE  for starters. The latest fallout from all of this includes the resignation of the Fire Chief and the termination...
  • Doctrine of Combat Fire Engagement

    by Christopher Naum - Friday January 29, 2010
    Considerations for changing fire flow rates, the sizing of hose line and the adequacies for fire flow demand and application rates, staffing needs for safe operations, considerations for defensive positioning and defensive operating postures must be considered, and it warrants repeating again; Reckless-Aggressive firefighting must be redefined in the built environment and associated with goal...
  • The Routiness of Success?

    by Christopher Naum - Friday January 15, 2010
    “It’s no longer just brute force and sheer physical determination that define structural fire suppression operations. Aggressive firefighting must be redefined and aligned to the built environment and associated with goal oriented tactical operations that are defined by risk assessed and analyzed tasks that are executed under battle plans that promote the best in safety practices and...
  • Twenty Ten

    by Christopher Naum - Thursday December 31, 2009
    As we transition into a new year, and as plans begin to take place that frame and outline the year’s activities, foremost in this planning, preparation, scheduling and outlook should be those activities and commitments that training, education and skill development can be implemented and enhanced. Take the initiative to recognize and identify training and operational gaps and distinguish the...
  • Predicated Building Behavior

    by Christopher Naum - Friday December 18, 2009
    When we look at various buildings and occupancies , past operational experiences; those that were successful, and those that were not, give us experiences that define and determine how we access, react and expect similar structures and occupancies to perform at a given alarm in the future. Naturalistic (or recognition-primed) decision-making forms much of this basis. We predicate certain...
  • The New Lexicon and Challenges

    by Christopher Naum - Tuesday December 8, 2009
    Of the many issues affecting the Fire Service, the prevailing challenge that has a pronounced impact on operational safety is the assimilation of engineered structural systems (ESS) into mainstream building design and construction. The presence of engineered structural systems (ESS) are no longer considered to be an innocuous feature in a given building or occupancy; it is the predominate...
  • That’s all Folks-It’s Not about Entertainment

    by Christopher Naum - Friday December 4, 2009
    When we focus our attention on Building Construction, Command Risk Management and Firefighter Safety and the essence of combat structural fires; Structural firefighting is what it’s all about, is it not ? The fundamental nature and reason we have such veneration for firefighting and the fire service and all it entails, has a lot to do with going into burning buildings and fighting fire. We...
  • The Worcester Six + Ten: Remembrance 1999-2009

    by Christopher Naum - Thursday December 3, 2009
    Today, December 3, 2009 marks the 10th anniversary of the Worcester Cold Storage Warehouse fire that resulted in the line of duty death of six courages brother firefighters. The Worcester Six; Firefighter Paul Brotherton Rescue 1 Firefighter Jeremiah Lucey Rescue 1 Lieutenant Thomas Spencer Ladder 2 Firefighter Timothy Jackson Ladder 2 Firefighter...
  • The Art of the Size-Up and Risk Assessment

    by Christopher Naum - Tuesday December 1, 2009
    Since the early 1950’s and the advent and subsequent development of the incident size-up function, the performance of size-up at an incident scene played an important role and has traditionally been considered to be a crucial element in the overall step-phased approach towards fire suppression operations and methodologies. More recently there’s been a constant hum in the background with...
  • The Wrong Dragon.....Hey, just look over your shoulder!

    by Christopher Naum - Saturday November 28, 2009
    I’ve commented and posted on some various blog sites on the issues related to engineer building construction components and assemblies. I posed some questions related to Engineered Structural Assemblies & Systems ( ESS) and asked if you knew what they represent and how these components, assemblies and systems may affect or influence incident operations? I also presented some information on...
  • It's Occupancy Risk-Not Occupancy Type

    by Christopher Naum - Sunday November 22, 2009
    It’s Occupancy Risk NOT Occupancy Type The traditional attitudes and beliefs of equating aggressive firefighting operations in all occupancy types coupled with correlating, established and pragmatic operational strategies and tactics MUST not only be questioned, they need to be adjusted and modified.   Risk assessment, risk-benefit analysis, safety and survivability profiling...
  • Firefighting in the Built Environment

    by Christopher Naum - Monday November 16, 2009
    If you don't fully understand how a building truly performs or reacts under fire conditions and the variables that can influence its stability and degradation, movement of fire and products of combustion and the resource requirements for fire suppression in terms of staffing, apparatus and required fire flows, then you will be functioning and operating in a reactionary manner. This places higher...
  • Predictability of Performance & Effective Battle Plans

    by Christopher Naum - Friday November 6, 2009
    The following are quotes from Fire Chief Anthony Aiellos (ret) Hackensack (NJ) Fire Department, Fire Chief during the Hackensack Ford Fire, July, 1988... "If you don't fully understand how a building truly performs or reacts under fire conditions and the variables that can influence its stability and degradation, movement of fire and products of combustion and the resource...
  • The Consciences Observer or Activist

    by Christopher Naum - Thursday October 15, 2009
    The Consciences Observer or Activist. So… the operative question today is this: What did you do on your last alarm response related to operational safety and enhanced situational awareness? Do you: participate in, contribute, join in, share, lead, promote, instruct, present, facilitate, help, assist, aid, or neglect, disregard, undermine, abuse, challenge, demoralize, undercut, damage...
  • Firefighting, Firefighter Safety and the Structural Anatomy of Buildingsonfire

    by Christopher Naum - Thursday October 15, 2009
    If you don't fully understand how a building truly performs or reacts under fire conditions and the variables that can influence its stability and degradation, movement of fire and products of combustion and the resource requirements for fire suppression in terms of staffing, apparatus and required fire flows, then you will be functioning and operating in a reactionary manner. This places higher...