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Health Tips from IMI's "Trowel Trades Safety Manual"

EYE PROTECTION

Excessive dust. splashing liquids. harmful rays, and flying chips and particles may require you to wear safety glasses, goggles or a face shield. You only have one pair of eyes, they cannot be fixed, and construction work has many eye hazards. Therefore, it is very important to wear eye protection.

  1. Wear eye protection to preserve your vision!
  2. Choose eye protection that matches the job. For example wear a face shield when using acid and goggles when working around excessive dust.
  3. Select safety glasses with shatter proof lenses. Make sure glasses fit comfortably and snugly while providing a clear field of vision. Protection must fit over your regular glasses.
  4. Avoid wearing contact lenses when there is a risk of eye injury.

EAR PROTECTION
Exposure to high levels of noise also is a hazard. Noise can cause nervousness, anxiety, or even permanent hearing loss. Most health and safety standards permit workers to be exposed to a noise level of approximately 90 decibels (medium volume mode) for eight hours a day. A decibel is the standard unit used to measure degrees or levels of noise, just as inch and meter are used to measure length.

If the level of noise or length of time is increased above the recommended limits, the worker must wear ear plugs or ear muffs. The following data suggests how long a person can be exposed to noise before damage may occur.

Duration Per Day Sound Level in Decibels
8 hours 90
6 hours 92
4 hours 95
3 hours 97
2 hours 100
1 1/2 hours 102
1 hour 105
1/2 hour 110
1/4 or less 115
Less than I second - impulsive or impact noise 140

Construction equipment makes a great deal of noise. For example, an air drill generates 100-114 decibels while a circular saw generates 100-116 decibels. Masonry saws, drills, Jack hammers and mixers all generate significant amounts of noise. Wet cut saws generate 112-114 decibels and quick cut saws generate 110-116 decibels.

Wear ear protection when you are working in or with equipment that produces loud or sustained noise. Choose ear plugs if levels do not exceed 95 decibels; choose ear muffs if noise exceeds 95 decibels.


DRESS FOR SAFE WORK

The clothing you wear to work is your most important safety equipment. Dressing right for the job gives you all-around protection against the ordinary hazards of construction. The right clothing, boots and hard hat can reduce and/or prevent many minor injuries such as cuts and bruises that are painful and decrease productivity. Further, the hard hat can save your life by protecting you from falling objects.

FOOTWEAR
›  Wear only hard-soled shoes such as boots. Hard soles protect against puncture wounds.
›  Wear work shoes with a higher top than a normal shoe. The extra length provides ankle-long protection and supports your ankle.
›  Wear reinforced-toe boots, if possible. Although they are heavier, reinforced-toe boots protect your feet from objects dropped on them.
›  Wear comfortable shoes with good arch supports. Adequate arch supports reduce fatigue when you work on your feet all day.

HARD HATS
›  Always wear your hard hat -- one that is approved by the Occupational Safety and Health Administration (OSHA).
›  Choose brightly colored, reinforced, non-metallic hats and keep them clean. Fiberglass or polycarbonate do not conduct electricity as readily as metal hats; bright colors are highly visible.
›  Adjust hard hats so that they are slightly raised off your head in order to absorb and cushion blows. No part of the outer shell should touch your head.
›  Adjust the sweatband so it rests on the middle of your forehead and fits snugly enough to remain in position while you work.
›  Adjust the suspension and crown strap so that there is a minimum clearance of 1" to 1 ¼" between the suspension and outer shell.
›  Periodically clean the hat and inspect the outer shell for cracks or abrasions that may cause the hat to shatter.

CLOTHES
›  Wear medium weight, white socks. White socks are cooler and contain no harmful dyes that can penetrate your feet.
›  Wear light-weight, Iight-colored, comfortably loose shirts. The light-weight, light-color, and loose fit will keep you cooler in hot weather. The shirt should not be so baggy as to be a hazard around machinery, however.
›  Wear work gloves when your fingers are sore, in cold weather, or when handling rough materials. Choose gloves that fit snugly and are not stiff. Wear belts or suspenders to prevent pant legs from sagging and catching on objects.
›  Avoid working without a shirt. The materials you are exposed to could injure bare skin. Equally important if you are working outside -- sunburn damage to skin can cause cancer.

 

SKIN RASHES
Perhaps one of the most sensitive and yet overlooked areas of trowel trades is skin protection, those exposed surfaces of the body that are subjected to cement dust, sand, wind, cold and hot temperatures. How can you prevent injury and avoid discomfort or even permanent injury as a result of abuse of the skin?

Many trowel trades craftworkers, have more or less resigned themselves to the fact that their hands will be stiff and leathery as a result of exposure to the materials they use. You can protect yourself.

REACTION TO EXPOSURE
Skin rash, or dermatitis is the most commonly reported occupational disease, it comes in many forms, can be caused by many things, can persist for years and can be very difficult to treat. Dermatitis even can be disfiguring, painful, and disabling.

Usually, a skin rash caused by exposure to chemicals will appear on exposed parts of the body the hands, arms, face and neck.

› 

A rash on the hands and arms is usually caused by handling harsh chemicals.

›  A rash that appears on the face and neck, and around the edges of clothing is usually caused by irritating dusts or mists.

Some skin rashes are caused by the poisonous effects of a chemical that has been inhaled or ingested. These rashes can appear anywhere on the body, not just on exposed skin.

Chemical irritation is caused by the action of a substance directly on the skin. The skin may dry out causing cracked, stiff, or bleeding skin or a rash may develop with blisters, blemishes swelling or redness. The irritation can be treated by stopping the exposure to the chemical and by using a lotion both to protect the skin from further damage and to moisten it. Gasoline, cements, and degreasing solvents can cause chemical irritation.

Chemical sensitization is caused by an allergic reaction the body can develop to many chemicals. This allergy may exist already or may develop following a few days, weeks or even years of exposure. Once a person becomes sensitized, even very small amounts of chemicals can bring out an allergic reaction -- usually a blistering, swelling, itching, reddening or acne-like condition. Cement and epoxy resins can contain substances that cause chemical sensitization.

Mechanical and physical irritation can result in burns, blisters or rashes. Materials like fiberglass, hemp, or other fibrous matter can cause mechanical irritation that can become painful and infected. Heat can cause "prickly heat", where the sweat glands clog up and the skin becomes waterlogged. Sunlight or ultraviolet light can cause burns.

Chloracne is a particularly severe form of dermatitis. It is caused by the toxic action of some very poisonous chemicals as opposed to irritation or sensitization, and is very slow to clear. It is painful and often quite disfiguring.

Folliculitis and acne also can be caused by exposure to chemicals at work. Folliculitis is the clogging of pores around hairs on the head, face, arms, thighs and hands. Industrial acne often occur on any part of the body. Asphalt, tars, pitch or creosote can cause these conditions.

PREVENTION
Dermatitis can be prevented. If a chemical is causing severe problems, a safer chemical often can be found.

Gloves and arm coverings should be provided to help prevent skin problems. They should be carefully selected to make sure they can protect against the chemical being used. No one plastic or rubber glove can protect against all chemicals. Aprons, face shields, and shoe coverings should be used if splashing of the chemical is likely to occur.

Work clothes should be cleaned regularly when chemicals damaging to the skin are used. Clothing contaminated with chemicals damaging to the skin should be placed in closed containers for storage until it can be discarded or until the chemicals can be removed from the clothing. If the clothing is to be cleaned to remove the chemicals, the person performing the operation should be informed of the chemicals' hazardous properties.

If a spill occurs, work clothes should be changed immediately. An emergency shower should be in the immediate vicinity to wash off toxic chemicals.

Creams to clean grease and oils from the hands and arms should be available. DO NOT USE LIQUID SOLVENTS -- they can cause a skin rash and can be absorbed into the body, causing systemic poisoning.

 

READING LABELS CAN SAVE YOUR LIFE
One way to help control your exposure to hazardous and toxic substances is to read and pay attention to labels on material containers (bags, tubes, and so forth). Container labels give the name of the chemical in the container, the name/address of the manufacturer and a hazard warning statement and/or graphic. If you read and obey warnings, labels can help protect you.

Different labeling systems are used by different organizations. Regardless of the type of label, they must follow some rules.

›  Indicate the identity of the hazardous chemical contained in container
›  Show hazard warnings appropriate for employee protection
›  Be written in English
›  Be legible and in plain sight

 

READING A MATERIAL SAFETY DATA SHEET
The Occupational Safety and Health Administration (OSHA) administers a standard called the Hazard Communication Standard (29 CFR 1910.1200). Its purpose is to reduce employee injury and illness caused by exposure to chemicals by providing information about the risk and safe handling procedures to employees. The information is provided on Material Safety Data Sheets (MSDS). In Canada, the Canada-wide Workplace Hazardous Materials Information System (WHMIS) gives workers the right to have information about the materials with which they work.

There is no set format for MSDS, however, they must describe the health and safety hazards of a substance, and must provide directions for its proper handling and use. They must be written in English and must be maintained so that an employee can see them for any hazardous substance on the job.

You must learn to read an MSDS. The information can save your life.

Several terms may help you read an MSDS:
›  Hazardous Material: Substances that are potentially toxic, incompatible with other substances, corrosive, explosive, flammable (or combustible), pose unusual physical hazards such as radioactivity or extreme cold, under normal use conditions and foreseeable emergencies.
›  Toxicity: Basic biological property of a chemical and reflects the chemical's inherent capacity to produce injury or adverse effect as a result of exposure or overexposure.
›  Carcinogen: A chemical capable of causing cancer.
›  Mutagen: Term applied to a chemical which can change the genetic material in a parent's reproductive cells. These changes can be passed to their children and their children's children.
›  Sensitizer: A chemical, which upon first exposure causes little or no reaction, but on subsequent exposure(s) may cause a greater response, not necessarily limited to the site of chemical contact.
›  Permissible Exposure Limit (PEL): A legally allowable average concentration of a substance to which a worker can be exposed for an eight hour workday, 40 hours/week, without suffering adverse health effects. A PEL for a chemical substance is set by the Occupational Safety and Health Administration (OSHA).
›  Threshold Limit Value (TLV): Similar to PEL the TLV is a recommended allowable average concentration of a substance to which a worker can be exposed for an eight hour workday, 40 hours/week, without suffering adverse health effects. The TLV for a chemical is set by the American Conference of Governmental Industrial Hygienists (ACGIH), which is an independent, non-governmental organization.

 

HANDLING LIME SAFELY
Trowel trades craftworkers are exposed to many hazardous substances that are ingredients of masonry building products and procedures. They also can be exposed to substances used by other trades.

Lime is one of these materials. This safety brief is not intended to replace specific material safety data sheets (MSDS) on the use of lime. It is intended to reinforce your knowledge of how to deal with it.

Material Specification:
Also known as calcium oxide; burnt lime; Quicklime; hydrated lime.

Appearance:
White or yellowish grainy powder.

Health Hazard Information:
Very irritating to the skin, eyes, nose and throat.
Can cause burns to any part of the body it contacts. If lime dust gets in the eyes, can cause permanent damage.
Symptoms of overexposure include tearing, coughing and skin irritation.
Pneumonia and bronchitis have been associated with exposure to high levels of lime dust.

Most Likely Exposure
Used as a bonding agent for bricks, mortar, plaster and stucco.

OSHA Permissible Exposure Limit (PEL)
The OSHA PEL for lime is 5 milligrams of lime per cubic meter of air averaged over 8 hours. ACGIH recommends 2 milligrams of lime per cubic meter.

Protect Yourself
›  Wear approved respirator for exposures above the PEL.
›  Wear impervious clothing, gloves, face shields and other protective clothing necessary to prevent skin contact with lime.
›  Wear dust-resistant safety goggles where lime may contact the eyes.
›  Insure availability of showers and eye-wash fountain within immediate work area for emergency use where body or eyes may be exposed to lime.