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Related Concept Videos

Personal Protective Equipment01:20

Personal Protective Equipment

Personal protective equipment (PPE) is unique clothing or equipment worn by an employee to minimize or prevent exposure to infectious agents. PPE creates a barrier between the employee and the infectious materials. PPE must be readily available in the patient care area. PPE includes gloves, gowns and aprons, masks and respirators, goggles, face shields, shoes, and headcovers:
PPE Use in Healthcare Settings I: Donning01:22

PPE Use in Healthcare Settings I: Donning

Donning PPE must be completed before contact with the patient. This process protects from infectious agents. The sequence and action included in each donning are critical, and the steps must be systematic to avoid exposure to pathogens. The institutional policy also needs to be followed while donning PPE. The pre-donning preparations are gathering equipment, inspecting the PPE equipment for tears, holes, or damage, removing jewelry, removing any garments below the elbows, and tying the hair...
Design Consideration01:22

Design Consideration

Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key aspect...
Design Example: Calculating Safe Diameter for Wind-Exposed Disc01:17

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
Transmission Shafts: Problem Solving01:09

Transmission Shafts: Problem Solving

Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...

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Related Experiment Video

Updated: May 13, 2026

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
07:30

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Published on: September 21, 2017

Anthropometric procedures for protective equipment sizing and design.

Hongwei Hsiao1

  • 1Protective Technology Branch, National Institute for Occupational Safety and Health, 1095 Willowdale Rd., Morgantown, WV 26505, USA. hxh4@cdc.gov

Human Factors
|March 23, 2013
PubMed
Summary

This study explored four anthropometric theories to improve protective equipment design, including tractor roll-over protective structures (ROPS) and firefighter gear. Findings led to updated design standards and better equipment fit for diverse users.

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Area of Science:

  • Ergonomics and Human Factors Engineering
  • Anthropometry and Biomechanics
  • Product Design and Safety Engineering

Background:

  • Effective product design relies heavily on anthropometric data, yet designers struggle with data processing and application.
  • Challenges persist in translating anthropometric measurements into functional and safe protective equipment.
  • Existing design standards may not adequately account for the full spectrum of human variability.

Purpose of the Study:

  • To present and evaluate four anthropometric theories for protective equipment design decisions.
  • To demonstrate the application of anthropometric theories in developing improved designs for specific safety equipment.
  • To provide a framework for integrating anthropometric data into the design process for enhanced product efficacy.

Main Methods:

  • Conducted four distinct studies involving diverse user groups: tractor operators, respirator users, firefighters, and civilian workers.
  • Collected anthropometric data and evaluated participant-equipment interfaces for specific protective equipment.
  • Applied univariate, bivariate/probability distribution, multivariate, and shape-based anthropometric methods.

Main Results:

  • Recommended extending vertical clearance for tractor roll-over protective structures (ROPS) based on operator anthropometry.
  • Identified potential exclusion of male firefighters by current respirator test panel standards, suggesting adjustments.
  • Developed principal component analysis-based body models for fire truck cab design and an improved gender-specific fall-arrest harness sizing scheme.

Conclusions:

  • Four anthropometric approaches and a design paradigm were presented for various protective equipment applications.
  • Demonstrated the practical application of anthropometric theories in defining protective equipment fit and sizing.
  • Provided a foundation for advancing anthropometric applications in product design to improve equipment efficacy and user safety.