Tag: safety

What to Look for in Ergonomic Design

You can’t squash a square peg into a round hole. In effect, that’s the idea behind ergonomic design. Instead of trying to contort human bodies to work tasks, ergonomic design seeks to fit products, tasks and environments to the people who use them. The result is increased productivity, decreased expense and greater worker safety. Definitely a win-win scenario for business and workers.

Ergonomics factors the human element into work tasks by taking into consideration physical capabilities such as force, posture and repetition. The psychological aspects of a task may also be considered, including mental loading and decision making. Ergonomic design may call upon the expertise of engineers, safety professionals, industrial hygienists, physical therapists, occupational therapists, nurse practitioners, chiropractors, physicians and the workers themselves.

In creating ergonomically designed equipment, both typical tasks and work sites are evaluated. By identifying potential risk factors and conditions, equipment can be engineered to reduce those risks. Ergonomic design must account not only for a range of work site conditions, but also for an even broader range of potential workers. After all, workers come in all body types. Height, weight, physical condition, physical and mental ability, age and sex must all be considered in designing ergonomic equipment. Ergonomic design generally allows equipment to be adjusted to allow for individual differences. 

DJ Products manufactures quality ergonomically designed electric and motorized carts. On our website, you’ll find a handy Ergonomic Load Calculator you can use to estimate the amount of horizontal force necessary to move loads in your particular business environment. The experienced staff at DJ Products can assist you in selecting ergonomically designed equipment that meets the needs of your business. Contact a DJ Products ergonomic design specialist today.

Michigan Poised to Adopt Ergonomic Standard

A new initiative in Michigan could presage an expected federal push to mandate ergonomic equipment and procedures in business and industry. Last week, Michigan state regulators unanimously voted to advance a proposed state-wide ergonomic standard. Unless blocked by the state legislature, as a similar initiative was in 2006, the new standard could take effect this year.

If implemented, Michigan would follow California, becoming the second state in the U.S. to implement its own ergonomic rules. While the federal government has established ergonomic guidelines for many industries, they are currently voluntary, although that is expected to change. During his campaign, President Obama promised to enact tougher workplace safety standards early in his administration.

With the unanimous support of the state’s General Industry Safety Standards Commission and the Occupational Health Standards Commission, Michigan political analysts believe that, this time around, any efforts to block the proposed state-wide ergonomic standard will fail. Supporters of ergonomic equipment and procedures point to their proven record in reducing preventable injuries that each year cost businesses millions of dollars in medical and insurance costs, worker’s compensation claims, and lost man-hours. According to Michigan’s Worker’s Compensation Bureau, about 40% of worker’s compensation claims paid in 2006 and 2007 were related to preventable ergonomic injuries.

The proven ability of ergonomically-designed material handling equipment to prevent repetitive stress and musculoskeletal injuries and reduce concomitant production and human resources costs is well documented by the U.S. Department of Labor and the Bureau of Worker’s Compensation. While opponents have expressed concern that Michigan’s ergonomic imperative will increase the cost of doing business in a state already struggling to survive economically, statistical and experiential evidence show that return on investment in ergonomic equipment is generally realized in the first year of ownership.

Michigan’s proposed standard would “assess risk factors that may contribute to work-related musculoskeletal disorders and establish a minimal rule for training,” according to the Michigan Department of Energy, Labor and Economic Growth. The standard will only apply to general industry businesses, not construction. Public hearings must now be held by Michigan’s Occupational Safety and Health Administration (MIOSHA) before the rule can be formally adopted, possibly as early as this summer.

Electric Carts Ease Strain of Push-Pull Tasks

Pushing and pulling are the two most required actions in industrial and business settings. Unfortunately, pushing and pulling can place extreme stress on a worker’s body, often resulting in back, groin and other musculoskeletal injuries. Injuries can cost an individual business thousands of dollars each year in medical, insurance, disability and lost man-hour costs. An ergonomically designed electric cart pusher and motorized cart puller eliminates the physical strain of manually pushing and pulling heavy carts and wheeled equipment. An investment in ergonomic equipment is a sound investment in the health and safety of your workforce that can save your business thousands of dollars in unnecessary medical and insurance costs.

In manufacturing and distribution settings, the most common solutions to material handling tasks are:

  • to place products, parts and equipment on pallets for handling or
  • to utilize racks, carts and casters to move materials.

Electric carts come in a variety of shapes, sizes and configurations to fit the demands of the task and the capabilities of your workforce. An ergonomically-designed cart mover reduces the amount of force that must be exerted by the operator to maneuver a load. Various cart and wheel configurations are available to meet the needs of any task.

  • Carts, racks or equipment with casters can be easily turned and maneuvered with a CartCaddy power tug that feature a 5th wheel turning method.
  • Carts, racks or equipment with 4 swiveling casters require a cart with back end control.
  • Specialized CartCaddies and an electric tug have been designed to handle carts or equipment that have straight wheels or are on a rail.

Visit the DJ Products website to view our complete line of ergonomic electric carts, trucks and lifts. We offer ergonomic solutions for material handling applications.

Using Ergonomic Equipment to Reduce Injury Rates

In our last post we talked about the challenges of managing a multicultural workforce in material handling, logistics, warehousing, fulfillment and other businesses. OSHA has reported higher than normal injury and on-the-job death rates for foreign-born Hispanic workers who comprise a growing segment of America’s hourly workforce. While language and cultural differences appear to be at the root of the problem, injury and death rates can be cut by using intuitive, ergonomically-designed, powered equipment to meet your material handling needs.

When communication is an issue, equipment that is easy to operate can improve training speed and reduce potential worker operation errors that can lead to injury. When controls are intuitively designed, communication gaps are narrowed further. What might not be grasped or fully remembered in verbal communication can be intuited by gesture or familiarity with similar equipment. This is not to say that a thorough training and safety program is not necessary, only that easy-to-operate equipment shortens the time between initial training and competent operation. Ergonomically-designed equipment is built around the worker, not the task, making it extremely user-friendly and an excellent choice in multicultural work environments.

Ergonomic material handling equipment that is electric or battery powered can further reduce injury and workplace death rates. In material handling situations, most injuries come from pulling, pushing or lifting loads and are the result of over-stretching or over-straining muscles. Powered equipment removes most of the need for heavy physical exertion from pulling, pushing and lifting tasks. By allowing the equipment to do the heavy lifting, so to speak, fewer situations are presented during the workday that might place workers at risk of injury.

To find out more about ergonomically-designed material handling equipment, visit the DJ Products website.

Congress Debates Increasing Fines for Worker Injury, Death

Congress is being urged to increase financial penalties for workplace injuries and deaths, according to congressional testimony reported by McClatchy Newspapers. In last week’s hearing before the U.S. House Education and Labor Committee, workers’ advocate groups squared off against industry safety experts to debate increasing penalties when employers don’t protect their workers against hazardous conditions.

Workers’ advocates pressured the federal government to drastically increase fines and implement possible criminal prosecution for senior executives when workers are killed or seriously injured on the job. “The thought process has to be, ‘If I keep doing this, and I keep letting this happen. … I could go to jail,'” David Uhlmann of the University of Michigan School of Law and a former U.S. Department of Justice official, told the House Committee.

Speaking for the opposing view, a workplace safety attorney who helps businesses figure out how to respond appropriately to U.S. labor laws, recommended more clearly defined labor safety laws and more stringent enforcement of existing penalties for employers who exhibit a “callous disregard” for workers’ safety. “There needs to be a balance,” Lawrence Halprin, a lawyer with Keller and Heckman, told the House Committee, noting that confusing labor regulations often contribute to the creation of workplace hazards.

Last week’s hearing was one more volley in the Congressional debate that is accompanying preparation of anticipated legislation to overhaul the 39-year-old Occupational Safety and Health Act (OSHA). With the Obama administration’s apparent blessing, House Democrats are preparing to give OSHA a new and sharper set of teeth. New regulations being considered would dramatically increase employers’ penalties, increase business owners’ accountability and protect workers who speak out about workplace violations. OSHA penalties have not been updated since 1990, and financial penalties were never indexed to inflation. Current penalties for the injury or death of a worker often total just a few thousand dollars.

“Penalties must be meaningful,” said Rep. George Miller, a California Democrat and chairman of the House Education and Labor Committee. “They must function to deter violations. They must get people’s attention.”

However, some committee members are concerned that their Congressional peers may be unduly swayed by the many stories of personal tragedy that have peppered the hearings. Rep. Tom Price, a Georgia Republican, noting that workplace fatalities have declined since 1994, said, “Sometimes Congress gets emotional and draws the wrong conclusions and makes the wrong laws.” Time will tell what happens here, but you might want to weigh in with your Congressman and tell him how you feel.

Managing a Multicultural Workforce

America’s workforce is becoming increasingly multicultural. At this year’s MHEDA convention, keynote speaker Steven Little predicted that changing demographics will redefine material handling workers and change the way we do business. As Baby Boomers retire and the U.S. workforce shrinks, industry will need to turn increasingly to foreign and immigrant workers. Within a decade, Little said, Spanish will be the primary language spoken in 20% of U.S. homes. Overcoming the language and cultural barriers presented by a multicultural workforce is expected to present a significant challenge for many industries, including material handling, warehousing and logistics operations.

As they have since the founding of America, immigrants bring with them a wealth of diverse languages, cultural traditions and customs. However, communication, productivity, and worker morale can suffer when differences are not addressed. This problem is already being experienced by businesses in the West and Southwest who employ Hispanic workers. Hispanics are one of the fastest-growing groups in the U.S. workforce. Unusually high injury rates and on-the-job deaths among foreign-born Hispanic workers prompted business owners to ask OSHA for help. In response OSHA is starting to offer classes on the social hierarchy of Latino and Asian cultures, both of which are more highly structured and rigid than American culture.

Accommodating the language, customs and social structure of foreign workers is necessary if immigrant workers are to be effectively integrated into the U.S. workforce. Material handling, logistics and warehousing firms that are proactive in accommodating language and cultural differences into their workplace routine will be able to profit from the increasing diversity of America’s workforce.

Ergonomic Wheel Design Improves Productivity

In our last post we talked about the importance of wheel design in reducing friction. But why is that important? The answer is that any design element that decreases the force that must be exerted by the operator to manipulate a piece of equipment increases efficiency and decreases the risk of potential injury. The result is greater productivity. This is the goal of ergonomic design both in the design of equipment and the environment in which it will be used.

When a wheeled piece of equipment is used, the operator must first overcome inertia and friction. The initial force necessary to start an object in motion is far greater than the sustained force necessary to keep it moving. Once in motion, optimum sustained, or rolling, force is achieved when a steady, constant velocity is achieved. Any need to decrease or increase velocity requires increased force to combat inertia. This is particularly noticeable during turning and maneuvering when significant force must be applied to change direction. Stopping a piece of wheeled equipment requires the same high level of force as starting it. As when accelerating, the operator must overcome high levels of inertia and friction to decelerate.

The four physical elements required to move a piece of wheeled equipment — starting, rolling, turning and stopping — can place tremendous stress on the operator’s musculoskeletal system. If performing these tasks manually, workers frequently overexert and strain muscles while applying the necessary force to start or stop a piece of equipment. Turning and positioning equipment can cause operators to assume asymmetric body postures during exertion which can cause musculoskeletal injury.

Ergonomically designed carts and tugs seek to achieve the optimal wheel size, type, placement and composition to decrease the force an operator must exert to move a piece of equipment.

Pushing vs Pulling Manual Carts

Pushing and pulling are the two most frequent actions workers execute in the course of doing their jobs. So in maneuvering manual carts, which is easier for the worker and creates less risk of injury — pushing or pulling?

Experts say pushing is preferable to pulling for a number of reasons. Research has demonstrated that people are able to exert higher push forces than pull forces. Given that horizontal push force, not the weight of the load or equipment, is the most significant factor in determining the effort required to move a load, that’s a significant consideration in selecting equipment.

Think of what happens to the body when you push something. Your entire body is used to create push force. In pushing an object, your body is more centered which allows you to concentrate force. Limbs are generally held closer to the body, limiting the possibility of extension injuries.

Pulling on the other hand, creates tremendous stress on individual body parts. When you pull an object and you are facing the direction of travel, one arm is stretched behind your body. This places the shoulder and back in awkward postures, increasing the potential for painful injury through overextension or awkward twisting. If you use two hands to pull an object you must have your back to the direction of travel. Walking backwards without a clear view of your path is an invitation to an accident. On an incline momentum can increase unexpectedly and the cart can careen into the worker or “run over” his feet.

There are times when pulling is the only way to maneuver a manual cart into the proper position, but at all other times pulling should be avoided. Pushing is the safer, more ergonomic way to move a manual cart.

Handhold Design Can Improve Worker Efficiency

Most carts have handholds of one sort or another. Handles are such an ordinary part of everyday equipment that it’s easy to ignore their importance in efficient equipment use. But handholds are the link between the operator and the load. Handholds cue the operator on how much force to exert and where to apply it most effectively to move the load. Handhold placement and design on carts can increase or decrease the ease and efficiency with which a worker moves a load.

In evaluating the usefulness of a cart, consider these important elements of handhold design:

  • Handhold Height. Handhold height defines the operator’s posture, and posture determines the amount of force a person is able to generate when moving a cart. Given the difference in human size, no single handhold height will be optimal for all workers. Handholds that cause operators to bend or stoop can lead to musculoskeletal injuries. When handholds are located at the proper height for an individual’s body, he is able to exert maximum force without straining his body. An adjustable handhold system will accommodate workers of various sizes. Other solutions include a continuous vertical handhold system that can be grasped at any point along its length or a series of handholds at varying heights.
  • Handhold Width. Handholds should allow the operator to grip the cart near its outer edge to provide maximum leverage for turning and positioning. However it’s important that hands, fingers or arms not protrude beyond the side of the cart to prevent crushing injuries should the cart come in contact with a wall or other equipment.
  • Handhold Type. The type of handhold can dramatically affect the amount of force an operator is able to exert when maneuvering a cart. Poor coupling, the contact between hands and equipment, can decrease the force an operator can exert by 65%. Handhold shape should not concentrate pressure on any specific area of the hand. There should be no sharp edges or pronounced ridges. Both the palm of the hand and the fingers should be able to contact the handhold which should be wide enough to accommodate the entire hand.
    Note: Pulling tasks require a handhold that can be gripped with the fingers wrapping around the handle. Pushing tasks need only a good surface that provides stable hand/equipment coupling.

Ergonomics Can Significantly Decrease Worker Injuries

Material handlers and laborers suffer more injuries and illnesses than construction workers, truck drivers or, indeed, any other category of workers, according to the U.S. Department of Labor. Material handlers and laborers miss more work days and therefore cost U.S. businesses more money in lost man-hours and higher insurance and healthcare costs than any other worker class.

Numerous studies have proved that ergonomically-designed equipment and systems can significantly decrease worker injury. Many manual tasks necessary during the handling of materials require repetitive motions — pushing, pulling, bending, lifting and carrying — that place undue strain on the human body. These actions can result in sprains, strains, back pain and other musculoskeletal injuries. Back pain is by far the most commonly reported workplace injury in the material handling industry. Treatment is generally lengthy and expensive, gobbling up the lion’s share of healthcare and workers’ compensation costs.

The implementation of an ergonomics program can significantly reduce injuries and their associated costs while improving productivity and worker morale. The Material Handling Industry of America (MHIA) has published a 68-page booklet of tips for improving ergonomics in the material handling industry. Click this link to download MHIA’s free Ergonomic Guidelines for Manual Material Handling. For more information on ergonomically-designed electric and motorized carts, pushers and tuggers, visit the DJ Products website.

Next time we’ll share some of MHIA’s best tips for improving ergonomics in the material handling industry and reducing worker injury and its associated costs.