ISSN: 1081 - 4140

The Safety Bulletin is Triodyne's second in a series of landmark publications which explore the field of Safety Engineering.

Volume 1 No. 1
Safeguard Evaluation Protocol - A Decision Tree for Standardizing, Optionalizing, Prohibiting, Ignoring, Enhancing or Characterizing Safeguards.

Ralph L. Barnett and Steven R. Schmid

This is a two-page version of Safety Brief V.11 # 2., Safeguard Evaluation Protocol.

Volume 1 No. 2
Risk Analysis..

Peter J. Poczynok and Ralph L. Barnett

The most important system for measuring risk, Accident Frequency Rate (AFR), is discussed here.

Volume 1 No. 3
Strongest Link Principle.

Dennis B. Brickman and Ralph L. Barnett

This is an exerpt from a paper presented at the 1994 International Mechanical Engineering Congress and Exhibition of the American Society of Mechanical Engineers Winter Annual Meeting. The full text of this paper is available at no charge from Triodyne. Inc.

Volume 1 No. 4
Light-Duty Vehicles in Tripped-Rollover Situations.

Kenneth L. d'Entremont

An analysis of research into light-duty vehicle rollover accidents.

Volume 2 No. 1
Friction Sled.

Claudine P. Giebs, Ralph L. Barnett and Peter J. Poczynok

Discussion of the Triodyne Friction Tester.

Volume 2 No. 2
The Drunk, the Child and the Soldier - My, How They Fall.

Ralph L. Barnett

It's better to collapse than to topple over, it's better to be short than tall and it's best not to fall at all.

Volume 2 No. 3
Air Brake System - Field Testing.

Christopher W. Ferrone and Dror Kopernik

It is often necessary to establish the integrity and adjustment of truck brake systems following an accident. A simulator has been developed to diagnose problems experienced during post-accident brake adjustment.

Volume 2 No. 4
Safety Rules of Thumb.

Ralph L. Barnett and Peter J. Poczynok

A discussion of the definitions and history of safety rules of thumb.

Volume 3 No. 1
Extension Ladders - Going Out on a Limb.

Ralph L. Barnett and Andrew H. Tudor

Sawing off a limb in back of you - this image has become cartoon cliche. On the other hand, sawing off a limb in front of you does not conjure up the slightest portent of danger. Nevertheless, when this activity is combined with an extension ladder, it can lead to the telescoping collapse of the ladder.

Volume 3 No. 2
Ride Evaluation - Heavy Trucks and Equipment.

Christopher W. Ferrone and Brian D. King

The full text of this SAE Paper, No. 933049, entitled "An Experimental Method for Determining Occupant Loading in Heavy Trucks and Equipment" is available by contacting Triodyne Inc.

Volume 3 No. 3
Who Ran the Red Light?

Dror Kopernik and John Goebelbecker

Reconstruction of vehicle accidents involves analyzing physical and testimonial evidence. However, physical evidence that remains after a collision in an intersection is independent of signal-light color and can never resolve the question of who ran the red light. Furthermore, drivers often disagree and witnesses may not have observed the lights in question. In these cases, analyzing testimony that correlates the color of any signals in the intersection with accident events may reveal the culprit.

Volume 3 No. 4
Defect Free Medical Devices.

James R. Wingfield

The FDA approval process cannot assure that medical devices are defect free. The major responsibility for safety and efficacy remains with the medical device manufacturer.

Volume 4 No. 1
Fall Protection: Minimum Weight Lanyards for Bowhunters.

Ralph L. Barnett

Bowhunters wear a safety belt for fall protection when climbing to or hunting from a tree stand. This bulletin focuses on the minimum weight design of the safety lanyard.

Volume 4 No. 2
The Grate Debate.

Dennis B. Brickman and Ralph L. Barnett

The full text of this paper was presented at the ASME International Mechanical Engineering Congress and Exposition in November of 1996, and is available at no cost from Triodyne Inc.

Volume 4 No. 3
The Runaway Diesel - External Fuel Ingestion.

Christopher W. Ferrone and Charles Sinkovits

When a diesel engine is exposed to a combustible airborne environment it has a propensity to become a "runaway".

Volume 4 No. 4
Is a Left Turn Right?

John Goebelbecker, Michael A. Dilich and Dror Kopernik

A heavy truck is about to turn left onto a high speed, multi-lane highway. An approaching car in the distance appears far enough away for the truck driver to pull out and start his turn. Seconds later, a collision occurs. What went wrong?

Volume 5 No. 1
Computer Animation and Simulation in Traffic-Accident Reconstruction.

Kenneth L. d'Entremont

A discussion of computer-generated simulation and animation as they relate to vehicle accident reconstruction.

Volume 5 No. 2
Interlocks - Tha Baking Industry Experience.

Steven R. Schmid

The experiences of the baking industry and interlocking of safeguards is summarized here.

Volume 5 No. 3
Minimum Safety Standard - An Oxymoron.

Ralph L. Barnett

Volume 5 No. 4
Standards Opposing Spoliation in Fire & Explosion Investigations.

John A. Campbell

Important information regarding fire and explosion accident investigation.

Volume 6 No. 1
Truck Rollover.

Michael A. Dilich and John M. Goebelbecker

The ability of a heavy truck to successfully negotiate a curve depends upon the vehicle's speed, its loaded stability and the geometry of the curve. When a rollover occurs, evaluation of factors related to the driver, the vehicle, and the roadway is required.

Volume 6 No. 2
Truck Mounted Ladder Racks.

William G. Switalski and Ralph L. Barnett

This bulletin demonstrates the benefit of securely tying ladders before transporting them on roof racks.

Volume 6 No. 3
Engineering Design Process Issues.

Crispin Hales

"It doesn't work." "It keeps on breaking down." "It doesn't produce to specifications." When claims such as these are made against a new product it is often necessary to investigate the engineering design process which gave rise to the product in the first place.

Volume 6 No. 4
Flash Point.

John A. Campbell and Kim R. Mniszewski

An important issue in fire safety is discussed in this bulletin.

Volume 7 No. 1
Falling: The Cook County Illinois Experience.

Claudine P. Giebs Myers, Peter J. Poczynok

An analysis of fall behavior as reported in the Cook County Verdict Reporter from 1991 and 1997.

Volume 7 No. 2
Margin of Safety for Heavy Trucks on Curves.

John M. Goebelbecker and S. Carl Uzgiris

On curves where margins of safety for heavy trucks are small, exceeding the advisory speed by less than 5 mph or performing abrupt steering maneuvers can cause some trucks to roll over.

Volume 7 No. 3
Know As Arcs--In-Line & Wet-Wire Electrical Fires.

John A. Campbell and Scott M. Howell

This bulletin presents information on two electrical ignition sources which are not well covered in the fire investigation literature.

Volume 7 No. 4
Interlocked Barrier Guards: Risk-Taking Philosophy.

Ralph L. Barnett

Interlocking is a safety philosophy; it is not just the use of interlock devices. Interlocks are used almost exclusively as countermeasures against risk-taking. To entertain their universal adoption is nothing short of a societal commitment to extend protection to individuals engaged in determined advertent multiple misuses of technology.

Volume 8 No. 1
Bungee Cord Hook Speed.

Adam Dybek and Dennis B. Brickman

The speed of bungee cord hooks has been measured for various brands of bungee cords with different lengths, diameters and initial elongations.

Volume 8 No. 2
Electronic Control Module - The "Flight Recorder" of Heavy Trucks.

Christopher W. Ferrone and John M. Goebelbecker

A heavy truck manufactured in the mid-1990's is likely to be equipped with an electronic control module (ECM) which has the capability of being the truck's "flight recorder" in a serious accident.

Volume 8 No. 3
Safety Potpourri.

Ralph L. Barnett

An often humorous collection of safety anecdotes.

Volume 8 No. 4
Were His Lights On?

Dror Kopernik and Michael A. Dilich

Sometimes, brake lights or turn signals are accused of not functioning and contributing to accidents. The validity of such claims can often be scientifically determined by examining the manner in which the condition of the subject lamp was changed by the collision.

Volume 9 No. 1
The Washing Machine Flood.

William G. Switalski

This bulletin discusses the primary sources of a washing machine flood.

Volume 9 No. 2
Primary vs. Secondary Protection: Why Interlocks Are Not an Acceptable Alternative to Lockout.

William G. Switalski

Volume 9 No. 3
Analysis of Vehicle Motion Using Aerial Photography.

Dror Kopernik and John Goebelbecker

Volume 9 No. 4
How To Climb An Unsafe Ladder.

Ralph L. Barnett

Weaknesses in a ladder structure are not always self revealing. Furthermore, a momentary loss of foot or hand control or even a patch of ice or grease may compromise a climber's safety. The proposed climbing strategy optimizes the safety profile. On the other hand, climbers must continue to follow the "classical ladder rules" dealing with ladder angle, overreaching, etc.

Volume 10 No. 1
Tautliner Vans Case Study: Safety Philosophy.

Ralph L. Barnett and Christopher Ferrone

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