Hard Hat by jennyyingdi


									Hard Hat
Birth of the Hard Hat
       The steel helmet World War I vet
        Edward Bullard used the steel
        helmet he wore in WWI as the
        inspiration for the hard hat.
       Designed to protect miners from
        falling objects.
       The first hard hat, the “hard-boiled
        hat,” was patented in 1919. It was
        made of canvas and resin.
      Birth of the Hard Hat
   1933- a face shield with a window
    for vision was incorporated to
    meet workplace needs.
   1938- Aluminum hard hats were
    introduced; improving durability
    with less weight
   1940’s- Fiberglass used for hard
    hat construction
   1950’s- Hard hats manufactured
    from thermoplastics
    Personal Protection
Hard hats protect
against against
impacts from falling
objects or debris,
electrical shocks and
burns, penetration
and flammability.
 Personal Protection
Protects your face,
head, neck, and
shoulders against
splashes, spills,
and drips.
    Personal Protection
   The rigid shell of the hard hat
    will resist and deflect an impact
    to the head.
   The suspension system located
    inside the hard hat will absorb
   The suspension should
    suspend the shell 1 1/4” for
    shock absorption and
When to Use a Hard Hat?
   When a person may be struck on the
    head by falling objects.

   If a person could strike their head
    against a fixed or protruding object.
   If contact may be made between the
    head and electrical hazards.

   When it is required
    Types & Classes
   TYPE I - protects the top of the
    head from penetration and impact
    (typical hard hat)
   TYPE II - provides some protection
    for the top of the head and off-
   CLASS C-Used in special services;
    do not provide voltage protection;
    designed for comfort and impact
         Types & Classes
   CLASS E (Previously Class B)- Used for electrical
    work; protects against falling objects as well as
    reduces the dangers involved with exposure to
    high voltage electrical shocks and burns.
   CLASS G (Previously Class A.)- Intended for
    general use; provide protection against falling
    objects and reduce the danger of exposure to low
    voltage electrical conductors.
      Suspension System
   Quick Slide/Pin-Lock (right)- slides to adjust,
    equipped with a locking mechanism

   Ratchet (left)- equipped with ratchet adjusting
    knob to adjust the fit
Hard Hat Accessories
   Face Shields
   Ear Muffs
   Sun Shields
   Neck Shields
   Flashlights
   Safety Light
         Hard Hat Stats.
   Each year there are approximately
    120,000 on-the-job head injuries;
    nearly 1,500 of them fatal.
   A head injury occurs every 15
    seconds in the U.S.
   Head injuries are one of the most
    costly work place accidents,
    averaging more than $135,000 per
    Hard Hats and ANSI
   In 1997, the American National Standards
    Institute revised its performance standards for
    protective hard hats.
   ANSI Personal Protection - Protective Headwear
    for Industrial Workers - Requirements ANSI
    Z89.1-1997. (latest revision)
   All ANSI-compliant hard hats must meet
    flammability criteria.
      Standards & Testing
    Hard hat samples are either cooled to 0。F or heated to
              120。F for two hours before testing

   Type I Impact Test- drop 8-lb steel ball
    from 5 ft; must not transfer no more than
    1,000 lb peak force
   Type I Penetration Test- drop 2.2-lb
    pointed steel penetrator from 8 ft; must
    not make contact with the head form
   Type II Impact and Penetration Test-
    drop helmeted head forms onto steel
    anvils and pointed steel penetrators.
   Standards & Testing
Electrical Conductivity Testing
 Before 1997- hard hats were tested by measuring
  the current in bodies of water inside and outside
  the hard hat
 After 1997- hard hats tested using metal foil on
  opposite surfaces of the shell of the hat
 Hard hat must with-stand 20,000 volts for 3
  minutes leaking less than 9 milliamps of current,
  followed by 30,000 volts without burning through
Standards & Testing
Flammability Test
 Hard hat is exposed to a 1,550。F flame for
  5 seconds.
 Five seconds after removing the test flame
  there must be no visible flame on the hard
Safety is no accident!
When hard hats are required
employees should know:
 Proper hard hat use (how to put on, wear, adjust,
 When it is necessary to use a hard hat
 What kind of hard hats are necessary
 The limitations of hard hats in injury protection
 How to properly clean and maintain hard hat
Hard Hat Maintenance
   Clean with hot water and
    antibacterial soap
   Check for wear in the shell-
    flaking, loss of surface
    gloss, deformation,
    cracking, perforations
   Check suspension systems
    for cracks, tears, fraying, or
    other forms of deterioration
The Future of Hard Hats
   Changing helmet design by
    eliminating the need for sewing
    the suspension straps.
   Discovery of new materials that
    have better design qualities, such
    as higher strength and a greater
    resistance to heat, chemicals, and
    ultraviolet radiation
   Refine manufacturing techniques
    through new and advanced
      Hard Hats

Protection where it matters most.

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