This material is for training purposes only. Its purpose is to inform Oregon employers of best practices in occupational safety and health and general Oregon OSHA compliance requirements. This material is not a substitute for any provision of the Oregon Safety Employment Act or any standards issued by Oregon OSHA. For more information on this online course and other OR-OSHA online training, visit the Online Course Catalog.

MODULE FIVE: HEAD, HAND AND FOOT PROTECTION

Head Protection .
There are primarily two situations when employees must wear protective helmets:
Falling objects
Wherever there is a potential in the workplace for injury to the head from falling objects, the employer must make sure that each affected employee wears a protective helmet.

Some examples of work that might require helmets to protect from falling objects include:

Working below other workers who are using tools and materials which could fall;
Working around or under conveyor belts which are carrying parts or materials; and
Working below machinery or processes which might cause material or objects to fall.

Some examples of occupations for which head protection should be routinely considered are:

carpenters,
electricians,
linemen,
mechanics and repairers,
plumbers and pipe fitters,
assemblers,
packers,
wrappers,

sawyers,
welders,
laborers,
freight handlers,
timber cutting and logging,
stock handlers, and
warehouse laborers

Electrical hazards

Whenever an employee works near exposed electrical conductors which could contact the head, the employer must make sure that a protective helmet designed to reduce electrical shock hazard is worn by the employee.

The employer should also furnish and make sure all employees and contractors engaged in construction and other miscellaneous work use proper head protection. Engineers, inspectors, and visitors at construction sites must also wear protective helmets when hazards from falling or fixed objects, or electrical shock are present.

Criteria for protective helmets.

Protective helmets purchased after July 5, 1994 must comply with ANSI Z89.1-1986 (before July 5, 1994 - Z89.1-196) or must be demonstrated by the employer to be equally effective. Purchasing helmets that meet these standards ensures that appropriate testing has been conducted and that the quality of the materials (webbing and shell)are adequate.

Selection guidelines for head protection

When selecting head protection, knowledge of potential for falling object and electrical hazards is important. When it's determined that these hazards exist, choose the most appropriate helmet from the categories below:

Class A helmets

In addition to impact and penetration resistance, this class of helmet provides electrical protection from low-voltage conductors (they are proof tested to 2,200 volts).

Class B helmets

In addition to impact and penetration resistance, this class of helmet provides electrical protection from high-voltage conductors (they are proof tested to 20,000 volts).

Class C helmets

These helmets provide impact and penetration resistance (they are usually made of aluminum which conducts electricity), and should not be used around electrical hazards. The photo to the left shows what's left of a Class C helmet after an accident. As you can see, the helmet did not provide much impact resistance.

Bump caps

Bump caps/skull guards should be issued and worn for protection against scalp lacerations from contact with sharp objects. However, it's very important to understand that they must not be worn as substitutes for safety caps/hats because they do not provide protection from impact forces or penetration by falling objects.

In 1997 ANSI revised the standard for Industrial Head Protection, ANSI Z89.1-1997. The following facts highlight significant points and changes to the new head protection requirements that are found in the standard and should be considered while evaluating appropriate head protection when conducting a personal protective equipment assessment.

OR-OSHA’s PPE standard (1910.135) specifies that helmets must meet requirements established by ANSI Z89.1-1986. The new ANSI Z89.1997 standard contains additional criteria for helmets. The new requirements are entirely voluntary until 1910.135 is changed to reflect the later standard.

Helmets that are designed and manufactured to the new standard are acceptable for use. The new ANSI Z89.1-1997 establishes guidelines for two different levels of impact protection: Type 1 is intended to reduce the force of impact resulting from a blow to the top of the head. Type 2 is intended to reduce the force of impact resulting from a blow which may be received off center or to the top of the head.

Workers in some occupations who are exposed to falling objects which may hit the helmet off center or on the side may be inadequately protected and at risk of injury since the type 1 hard hat is not designed to take this angle of impact.

Periodic examinations should be made of all protective helmet and, and in particular, those worn or stored in areas exposed to sunlight for long periods. Ultraviolet degradation may first manifest itself in a loss of surface gloss, called chalking or discoloration. Upon further degradation, the surface will craze or flake away, or both. At the first appearance of any of these phenomena, the shell should be replaced.

Hand Protection

Hazards requiring hand protection .

	Most companies use some type of chemicals in their workplaces. Some of these chemicals are hazardous and require PPE to protect them against toxic effects. More than any other part of the body, our hands are most likely to come in contact with these hazardous chemicals. Chemical hazards might expose the employee to the following: Absorption of harmful substances Chemical burns Rashes
	But, hazardous chemicals are not the only worry. Employees may also be exposed to other hazards that could injure their hands. These hazards include: Cuts or lacerations; Abrasions; Punctures; thermal burns; and harmful temperature extremes Consequently, it's crucial that employers select and require employees to use appropriate hand protection when exposed to any of these hazards

Selection

It's important that employers work closely with their PPE supplier to select appropriate hand protection based on an evaluation of the performance characteristics of the hand protection. Specifically the employer needs to look at each of the following:

specific task(s)being performed,
environmental conditions present,
duration of hand protection use while performing the task,
the actual hazards, and
potential hazards

The work activities of the employee should also be studied to determine:

the degree of dexterity required,
the duration the task,
the frequency of the task,
degree of exposure of the hazard, and
the physical stresses that will be applied

Selection guidelines for hand protection

Oregon OSHA is unaware of any gloves that provide protection against all potential hand hazards, and commonly available glove materials provide only limited protection against many chemicals. Therefore, it is important to select the most appropriate glove for a particular application and to determine how long it can be worn, and whether it can be reused.

Chemicals will eventually soak through or "permeate" most glove materials rendering them unsafe. Gloves can be used safely for limited time periods if specific use and other characteristics (i.e., thickness and permeation rate and time) are known. Your PPE supplier can be an excellent expert source to assist in determining the specific type of glove material that should be worn for a particular chemical.

These performance characteristics should be assessed by using standard test procedures. Before purchasing gloves, the employer should request documentation from the manufacturer that the gloves meet the appropriate test standard(s) for the hazard(s) anticipated.

Read instructions and warnings on chemical container labels and MSDSs before working with any chemical. Recommended glove types are often listed in the section for personal protective equipment. However, it's important to check with your PPE supplier to make sure the list is current and accurate.

One more consideration is that as long as the performance characteristics are acceptable, in certain circumstances, it may be more cost effective to regularly replace less expensive gloves than to reuse more expensive types.

When selecting gloves for protection against chemical hazards, consider the following:

The toxic properties of the chemical(s) must be determined; in particular, the ability of the chemical to cause local effects on the skin and/or to pass through the skin and cause systemic effects;
Generally, any "chemical resistant" glove can be used for dry powders;
For mixtures and formulated products (unless specific test data are available), a glove should be selected on the basis of the chemical component with the shortest breakthrough time, since it is possible for solvents to carry active ingredients through polymeric materials; and,
Employees must be able to remove the gloves in such a manner as to prevent skin contamination.

Skin contact is a potential source of exposure to toxic materials; it is important that the proper steps be taken to prevent such contact. Most accidents involving hands and arms can be classified under four main hazard categories: chemicals, abrasions, cutting, and heat. There are gloves available that can protect workers from any of these individual hazards or any combination thereof.

Gloves should be replaced periodically, depending on frequency of use and permeability to the substance(s)handled. Gloves overtly contaminated should be rinsed and then carefully removed after use. With this in mind, there are two important characteristics of gloves to consider:

Permeation rate. The permeation rate measures the length of time it takes a given material (glove) to become saturated by the chemical through absorption.

Breakthrough or Penetration rate. The penetration rate measures the speed with which a given chemical breaks through the layer(s) of the glove to contact the skin.

Gloves should also be worn whenever it is necessary to handle rough or sharp-edged objects, and very hot or very cold materials. The type of glove materials to be used in these situations include leather, welder's gloves, aluminum-backed gloves, and other types of insulated glove materials.

Careful attention must be given to protecting your hands when working with tools and machinery. Power tools and machinery must have guards installed or incorporated into their design that prevent the hands from contacting the point of operation, power train, or other moving parts. To protect hands from injury due to contact with moving parts, it is important to:

Ensure that guards are always in place and used.

Always lock-out machines or tools and disconnect the power before making repairs.

Treat a machine without a guard as inoperative; and

Do not wear gloves around moving machinery or parts, such as drill presses, mills, lathes, and grinders.

The following is a guide to the most common types of protective work gloves and the types of hazards they can guard against:

Disposable Gloves. Disposable gloves, usually made of light-weight plastic, can help guard against mild irritants.

Fabric Gloves. Made of cotton or fabric blends are generally used to improve grip when handling slippery objects. They also help insulate hands from mild heat or cold.

Leather Gloves. These gloves are used to guard against injuries from sparks or scraping against rough surfaces. They are also used in combination with an insulated liner when working with electricity.

Metal Mesh Gloves. These gloves are used to protect hands from accidental cuts and scratches. They are used most commonly by persons working with cutting tools or other sharp instruments.

Aluminized Gloves. Gloves made of aluminized fabric are designed to insulate hands from intense heat. These gloves are most commonly used by persons working molten materials.

Chemical Resistance Gloves. These gloves may be made of rubber, neoprene, polyvinyl alcohol or vinyl, etc. The gloves protect hands from corrosives, oils, and solvents. The glove chart below may serve as a guide to the different types of glove materials and the chemicals they can be used against. When selecting chemical resistance gloves, be sure to consult the manufacturers’ recommendations, especially if the gloved hand will be immersed in the chemical.

Glove Chart

Type	Advantages	Disadvantages	Use Against
Natural rubber	Low cost, good physical properties, dexterity	Poor vs. oils, greases, organics. Frequently imported; may be poor quality	Bases, alcohols, dilute water solutions; fair vs. aldehydes, ketones.
Natural rubber blends	Low cost, dexterity, better chemical resistance than natural rubber vs. some chemicals	Physical properties frequently inferior to natural rubber	Same as natural rubber
Polyvinyl chloride (PVC)	Low cost, very good physical properties, medium cost, medium chemical resistance	Plasticizers can be stripped; frequently imported may be poor quality	Strong acids and bases, salts, other water solutions, alcohols
Neoprene	Medium cost, medium chemical resistance, medium physical properties	NA	Oxidizing acids, anilines, phenol, glycol ethers
Nitrile	Low cost, excellent physical properties, dexterity	Poor vs. benzene, methylene chloride, trichloroethylene, many ketones	Oils, greases, aliphatic chemicals, xylene, perchloroethylene, trichloroethane; fair vs. toluene
Butyl	Specialty glove, polar organics	Expensive, poor vs. hydrocarbons, chlorinated solvents	Glycol ethers, ketones, esters
Polyvinyl alcohol (PVA)	Specialty glove, resists a very broad range of organics, good physical properties	Very expensive, water sensitive, poor vs. light alcohols	Aliphatics, aromatics, chlorinated solvents, ketones (except acetone), esters, ethers
Fluoro- elastomer (Viton)	Specialty glove, organic solvents	Extremely expensive, poor physical properties, poor vs. some ketones, esters, amines	Aromatics, chlorinated solvents, also aliphatics and alcohols
Norfoil (Silver Shield)	Excellent chemical resistance	Poor fit, easily punctures, poor grip, stiff	Use for Hazmat work

Foot protection

The employer must make sure that each affected employee uses protective footwear when working in areas where there is a danger of foot injuries due to:

falling or rolling objects
objects piercing the sole
where feet are exposed to electrical hazards

Criteria for protective footwear .

Protective footwear purchased after July 5, 1994 must comply with ANSI Z41-1991 (before July 5, 1994 - ANSI Z41.1-1967) or must be demonstrated by the employer to be equally effective.

Footwear that meets established safety standards will have an American National Standards Institute (ANSI)label inside each shoe.

Steel-Reinforced Safety Shoes

These shoes are designed to protect feet from common machinery hazards such as falling or rolling objects, cuts, and punctures. The entire toe box and insole are reinforced with steel, and the instep is protected by steel, aluminum, or plastic materials. Safety shoes are also designed to insulate against temperature extremes and may be equipped with special soles to guard against slip, chemicals, and/or electrical hazards.

Safety Boots

Safety boots offer more protection when splash or spark hazards (chemicals, molten materials) are present:

When working with corrosives, caustics, cutting oils, and petroleum products, neoprene or nitrile boots are often required to prevent penetration.
Foundry or "Gaiter" style boots feature quick-release fasteners or elasticized insets to allow speedy removal should any hazardous substances get into the boot itself.
When working with electricity, special electrical hazard boots are available and are designed with no conductive materials other than the steel toe (which is properly insulated).

Selection guidelines for foot protection

Safety shoes and boots which meet the ANSI Z41-1991 Standard provide both impact and compression protection.

Safety shoes or boots with impact protection would be required for carrying or handling materials such as packages, objects, parts or heavy tools, which could be dropped; and, for other activities where objects might fall onto the feet.

Safety shoes or boots with compression protection would be required for work activities involving skid trucks (manual material handling carts) around bulk rolls (such as paper rolls) and around heavy pipes, all of which could potentially roll over an employee's feet.

Safety shoes or boots with puncture protection would be required where sharp objects such as nails, wire, tacks, screws, large staples, scrap metal etc., could be stepped on by employees causing a foot injury.

Last Words

There are many types and styles of protective head, hand and foot gear. It's important to realize that a particular job may require additional protection other than listed here. Well, it's time once again for the review quiz, so let's get to it!

MODULE Quiz

26. Head protection is required only when hazards from falling objects are present.

a. True
b. False

27. Which classification of helmet should not be used around electrical conductors?

a. Class A helmet
b. Class B helmet
c. Class C helmet
d. Class D helmet

28. Why is the Class C helmet a poor choice for head protection while working around falling object hazards.

29. List three hazards hand protective devices can protect against.

30. Employers should select hand protection based on the performance characteristics related to all the following except:

a. Task(s) being performed
b. Environmental conditions present
c. Medical exams
d. Duration of use of hand protection
e. The actual hazards

31. When selecting hand protection, all of the following are important work activities to consider except:

a. The degree of dexterity required
b. The duration of the task
c. The frequency of the task
d. The cost of the hand protection
e. The degree of exposure of the hazard

32. The __________ rate measures the speed with which a given chemical breaks through the layer(s) of the glove to contact the skin.

a. Permeation
b. Penetration
c. Permetration
d. Permenation

33. Foot protection should protect from what three types of hazards?

34. Foot protection providing impact protection would be required for work requiring carrying heavy packages.

a. True
b. False

35. Safety shoes or boots with compression protection are required for work where sharp objects such as nails, wire, tacks, screws, large staples, scrap metal etc., could be stepped on by employees causing a foot injury.

a. True
b. False

Congratulations on completing the this module! You're over the hump! Only two mods to go. Continue on to the next module to learn more about electrical protective equipment and fall protection. If you have any questions or comments, just drop me an email at email.

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