Life Safety Code

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Life Safety Code

April 29, 2026
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Today at the usual hour we sort through the NFPA stack for fire safety system aspects during renovation, alteration, or rehabilitation of buildings.  Two sections come to mind:

Chapter 43 (NFPA 101): Building Rehabilitation

 

NFPA 241: Safeguarding Construction, Alteration, and Demolition Operations
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Educational and Day-Care Occupancies (July 23, 2025 Second Draft Transcript)

The Life Safety Code addresses those construction, protection, and occupancy features necessary to minimize danger to life from the effects of fire, including smoke, heat, and toxic gases created during a fire.   It is widely incorporated by reference into public safety statutes; typically coupled with the consensus products of the International Code Council.   It is a mighty document — one of the NFPA’s leading titles — so we deal with it in pieces; consulting it for decisions to be made for the following:

(1) Determination of the occupancy classification in Chapters 12 through 42.

(2) Determination of whether a building or structure is new or existing.

(3) Determination of the occupant load.

(4) Determination of the hazard of contents.

There are emergent issues — such as active shooter response, integration of life and fire safety systems on the internet of small things — and recurrent issues such as excessive rehabilitation and conformity criteria and the ever-expanding requirements for sprinklers and portable fire extinguishers with which to reckon.  It is never easy telling a safety professional paid to make a market for his product or service that it is impossible to be alive and safe.  It is even harder telling the dean of a department how much it will cost to bring the square-footage under his stewardship up to the current code.

The 2021 edition is the current edition and is accessible below:

NFPA 101 Life Safety Code Free Public Access

Public input on the 2027 Revision will be received until June 4, 2024.  Public comment on the Second Draft 2027 Revision will be received until March 31, 2026.

 

Since the Life Safety Code is one of the most “living” of living documents — the International Building Code and the National Electric Code also move continuously — we can start anywhere and anytime and still make meaningful contributions to it.   We have been advocating in this document since the 2003 edition in which we submitted proposals for changes such as:

• A student residence facility life safety crosswalk between NFPA 101 and the International Building Code

• Refinements to Chapters 14 and 15 covering education facilities (with particular attention to door technologies)

• Identification of an ingress path for rescue and recovery personnel toward electric service equipment installations.

• Risk-informed requirement for installation of grab bars in bathing areas

• Modification of the 90-minute emergency lighting requirements rule for small buildings and for fixed interval testing

• Modification of emergency illumination fixed interval testing

• Table 7.3.1 Occupant Load revisions

• Harmonization of egress path width with European building codes

There are others.  It is typically difficult to make changes to stabilized standard though some of the concepts were integrated by the committee into other parts of the NFPA 101 in unexpected, though productive, ways.  Example transcripts of proposed 2023 revisions to the education facility chapter is linked below:

Chapter 14 Public Input Report: New Educational Occupancies

Educational and Day Care Occupancies: Second Draft Public Comments with Responses Report

Since NFPA 101 is so vast in its implications we list a few of the sections we track, and can drill into further, according to client interest:

Chapter 3: Definitions

Chapter 7: Means of Egress

Chapter 12: New Assembly Occupancies

Chapter 13: Existing Assembly Occupancies

Chapter 16 Public Input Report: New Day-Care Facilities

Chapter 17 Public Input Report: Existing Day Care Facilities

Chapter 18 Public Input Report: New Health Care Facilities

Chapter 19 Public Input Report: Existing Health Care Facilities

Chapter 28: Public Input Report: New Hotels and Dormitories

Chapter 29: Public Input Report: Existing Hotels and Dormitories

Chapter 43: Building Rehabilitation

Annex A: Explanatory Material

As always we encourage front-line staff, facility managers, subject matter experts and trade associations to participate directly in the NFPA code development process (CLICK HERE to get started)

NFPA 101 is a cross-cutting title so we maintain it on the agenda of our several colloquia —Housing, Prometheus, Security and Pathways colloquia.  See our CALENDAR for the next online meeting; open to everyone.

 

Issue: [18-90]

Category: Fire Safety, Public Safety

Colleagues: Mike Anthony, Josh Elvove, Joe DeRosier, Marcelo Hirschler

More

ARCHIVE / Life Safety Code 2003 – 2018

 


Fire and Life Safety in Stadiums

Wayfinding

April 29, 2026
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Modelling and Simulation Wayfinding in Unfamiliar Campus Environment

Designing digital signage for better wayfinding performance: New visitors’ navigating campus of university

Wayfinding Behavior Detection by Smartphone

Human Behavior During Emergency Evacuation: Cell Transmission Model

Almawhere 2.0: a pervasive system to facilitate indoor wayfinding

Managing egress of crowd during infrastructure disruption

A Fuzzy-Theory-Based Cellular Automata Model for Pedestrian Evacuation From a Multiple-Exit Room

Emergency exit sign detection system for visually impaired people

Evacuating Routes in Indoor-Fire Scenarios with Selection of Safe Exits on Known and Unknown Buildings Using Machine Learning

Exits choice based on cellular automaton model for pedestrians’ evacuation

Computer aided architectural design: Wayfinding complexity analysis

Using space syntax to understand knowledge acquisition and wayfinding in indoor environments

Wayfinding by auditory cues in virtual environments

Computer Vision Method in Means of Egress Obstruction Detection

Map Displays And Landmark Effects On Wayfinding In Unfamiliar Environments

Informing the design of an automated wayfinding system for individuals with cognitive impairments

Virtual Reality to Study Pedestrian Wayfinding: Motivations and an Experiment on Usability

AR-enabled wayfinding kiosk

Research on the terrain cognition in small-scale environment

A comparison study of stationary and mobile eye tracking on EXITs design in a wayfinding system

CityGuide: A Seamless Indoor-Outdoor Wayfinding System for People With Vision Impairments

Poster: Evaluation of Wayfinding Aid Techniques in Multi-Level Virtual Environments

Automatic Optimization of Wayfinding Design

Implementing game artificial intelligence to decision making of agents in emergency egress

Navigating MazeMap: Indoor human mobility, spatio-logical ties and future potential

Energy conservation from retrofit ‘exit‘ sign in public premises

 

British High Schoolers Try American Fried Chicken, Biscuits & Sausage Gravy

April 28, 2026
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Biscuits and sausage gravy is firmly rooted in Southern American cuisine, which has a rich history influenced by African, Native American, European, and other culinary traditions. The combination of biscuits and sausage gravy reflects the availability of ingredients in the South, where biscuits (similar to a type of British scone) and pork products were common.

The concept of biscuits, similar to what Americans call biscuits, has British origins. Early settlers brought this baking technique with them to the American colonies. However, the American biscuit evolved over time to become lighter and fluffier compared to the denser British biscuit.

Kitchens 300

American Highschoolers try REAL British food for the first time!

Late Night Breakfast | May

April 28, 2026
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Late Night Breakfast (December & May)

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ProPublica: Statement of Financial Position | Capital Master Plan

Creator of Beloved Roger Williams Statue on RWU Campus Dies at Age 87 | Roger Williams University

The greatest crime is not developing your potential. When you do what you do best, you are helping not only yourself, but the world. - Roger Williams

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Severe Weather Preparedness Plan

POLI SCI 425 (Summer) “Political Psychology of Polarization

April 28, 2026
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Power-Limited Circuits

April 28, 2026
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Today at the usual hour we review best practice literature for the design, construction and operation of Power-Limited Circuits in healthcare facilities.  With our previous tenure on Code Panel 15 of the National Electrical Code (which covers healthcare facilities, primarily) and our recent appointment by IEEE to Code Panel 3 (which covers power limited circuits in all occupancy classes) we set ourselves up to respond to the proposals that will shape the 2029 NEC.   Use the login credentials at the upper right of our home page.

vbvbvbvbvb

If one imagines that three-phase hospital power distribution systems as “arteries” then power limited circuits can be imagined as the “capillaries” that drive hundreds of end use clinical equipment and devices. The analogy captures the hierarchical, physiological structure of hospital electrical systems—much like the human circulatory system—where power flows from high-capacity trunks to precision, low-risk endpoints.


Three-Phase Systems: The Arteries and Veins

Three-phase hospital power distribution systems function as the arteries and veins: they are the robust, high-volume “vascular” network. Incoming utility power (or on-site generators) arrives as three-phase medium voltage, stepped down through transformers and switchgear into the Essential Electrical System (EES). This backbone—normal power, life-safety, critical, and equipment branches—delivers bulk kilowatts across the facility to major loads: HVAC, lighting, elevators, imaging suites, and operating-room receptacles. Like arteries, these feeders carry large currents over long distances with minimal loss; like veins, they return current safely while maintaining redundancy and selective coordination to keep the “body” (hospital) alive during outages.

Power-Limited Circuits: The Capillaries

Power-limited circuits (NEC Article 725/724 Class 2 and Class 3) are the capillaries. They are the countless, tiny, energy-restricted final branches that directly “perfuse” end-use clinical devices. These circuits are deliberately power-limited—typically ≤30 V and ≤100 VA—to prevent fire, shock, or interference in patient-care spaces. They supply nurse-call systems, bedside monitors, infusion-pump controls, alarm signaling, data links, and low-voltage sensors. Just as capillaries exchange oxygen and nutrients cell-by-cell without flooding tissue, power-limited circuits deliver only the precise, safe wattage needed by sensitive electronics while isolating them from the high-energy main distribution. Their thin insulation, separation rules, and inherent current-limiting transformers mirror the delicate walls of capillaries.

The comparison illuminates why hospitals cannot rely solely on heavy three-phase feeders: without these microscopic “capillaries,” clinical devices would either lack power or be exposed to dangerous fault energies. The analogy shows how the entire system maintains life—bulk transport for infrastructure, micro-delivery for patient care—while enforcing safety through progressive limitation. In essence, the capillaries make the circulatory system functional at the point of use.

Baked Potato Strips

April 27, 2026
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Recipe Guide

Maine Major Capital School Construction Programs | Maine Farm Safety Programs

Maine Extension Homemakers Newsletter, January-February-March 2025


Radio Machias WUUM 91.1 MHz FM

Maine



Sarah Lawrence College

April 27, 2026
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Homegating

April 27, 2026
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Nitro Cold Brew

April 27, 2026
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Consolidated Financial Statement 2024: $3.541B

Nitro cold brew is bubbling up in coffee shops almost everywhere. The nitrogen-infused beverage became one of the hottest new offerings for coffee lovers looking for something different.   The cold brew — made by steeping coffee grinds in cold water for multiple hours — is dispensed from a stout tap, similar to what you’d find at your local bar.

Image: Chemical & Engineering News

WBUR City Space | Campus Planning & Operations


Howard Zinn taught at Boston University from 1964 to 1988.  His intellectual legacy has not held up well among serious historians.  Zinn presented American history as a simplistic morality play of evil elites versus virtuous “the people.” Scholars across the political spectrum, including left-leaning historians like Michael Kazin and Sam Wineburg, have criticized it as a “polemic disguised as history” and a Manichean fable rather than rigorous scholarship. The book is filled with selective quoting, decontextualized facts, major omissions, and heavy reliance on secondary sources that support his Marxist-tinged narrative. Detailed critiques, such as Mary Grabar’s Debunking Howard Zinn, document numerous factual distortions regarding Columbus, the American Revolution, slavery, WWII, and more.  Zinn openly rejected “disinterested scholarship” in favor of activism, producing advocacy rather than balanced analysis. While influential in activist and popular circles, its methodological flaws and lack of nuance have kept it outside mainstream academic respect. 

 

City Journal (February 6): “The Downfall of Ibram X. Kendi”

Discusses the collapse of Kendi’s Center for Antiracist Research at Boston University, alleging mismanagement of $55 million with minimal research output. Describes Kendi as a “symbol of the BLM era’s destructive passions” and notes his move to Howard University. 

— Christopher F. Rufo

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