Ergonomics, the General Duty Clause and the law in the US

Employers have legal duties to protect workers from ergonomic hazards, but the way the law addresses ergonomics differs a great deal between jurisdictions. Some laws contain detailed requirements for assessing and controlling the risk of musculoskeletal injury. Others rely on the general duty to provide a safe workplace, supported by guidelines and standards. This lesson outlines where the requirements come from so you know what applies where you work and where to look for detail.

Who regulates ergonomics in the US

In the US, the Occupational Safety and Health Act of 1970 (OSH Act) covers most private-sector employers. It is enforced by the federal Occupational Safety and Health Administration (OSHA) or by state agencies operating OSHA-approved State Plans, which must be at least as effective as federal OSHA and may adopt stricter rules. About half of the states run State Plans, some covering only public employees. Federal OSHA has no specific ergonomics standard, so ergonomic hazards are addressed mainly through the General Duty Clause, recordkeeping rules, guidelines and a few state laws. Workers' compensation is a separate, state-run system that pays benefits for work-related MSDs.

The General Duty Clause

Section 5(a)(1) of the OSH Act, the General Duty Clause, requires each employer to furnish a place of employment free from recognized hazards that are causing or are likely to cause death or serious physical harm. To cite an employer for an ergonomic hazard under this clause, OSHA must show four elements: that a hazard existed to which employees were exposed; that the hazard was recognized by the employer or the employer's industry; that it was causing or likely to cause death or serious physical harm; and that a feasible and effective means of abatement existed. Because these elements must be proved case by case, often with expert evidence, General Duty Clause ergonomics citations are relatively uncommon and frequently contested, but they remain the main federal enforcement tool. Section 5(a)(2) requires employers to comply with OSHA standards, and section 5(b) requires employees to comply with standards and rules that apply to their own conduct.

The ergonomics standard that was repealed

In November 2000, OSHA published a comprehensive ergonomics program standard (29 CFR 1910.900) that would have required employers to respond to reported MSDs and to establish ergonomics programs for jobs with MSD hazards. In March 2001, before it took effect, Congress repealed it using the Congressional Review Act, which also prevents OSHA from issuing a substantially similar rule without new authorization from Congress. Since then, federal OSHA has followed a strategy built on voluntary industry guidelines, outreach, research, and enforcement under the General Duty Clause. OSHA published ergonomics guidelines for nursing homes, retail grocery stores, poultry processing and shipyards, and it supports the NIOSH research and tools used throughout this course.

Because the federal ergonomics standard was repealed, the most detailed US requirements come from a few states. California's §5110, adopted in 1997, was the first state ergonomics standard; it is narrow, applying only after repetitive motion injuries have been diagnosed in more than one worker doing the same task. Minnesota's 2023 law, in force from January 2024, is broader for the sectors it covers and includes a matching grant program for ergonomic improvements. Other states have addressed specific hazards through safe patient handling laws and warehouse quota laws, which recognize that production quotas can drive unsafe pace and prevent rest breaks.

Recordkeeping and reporting

Under OSHA's recordkeeping rule (29 CFR Part 1904), most employers with more than ten employees in non-exempt industries must record work-related injuries and illnesses on the OSHA 300 log if they result in death, days away from work, restricted work or transfer, medical treatment beyond first aid, loss of consciousness, or a significant diagnosed injury or illness. MSDs are recorded under the same criteria as other injuries; there is no separate MSD column. First aid measures such as non-prescription medication at non-prescription strength, hot or cold therapy, non-rigid supports such as elastic bandages and wraps, and massage are not recordable on their own, while prescription medication, rigid splints and physical therapy are. Certain establishments must submit injury data electronically each year. Section 1904.35 requires a reasonable reporting procedure and prohibits retaliation against employees who report injuries.

Standards and guidelines

Standards are not law unless a regulation references them, but they define good practice and are often used by inspectors, courts and auditors to judge what is reasonable. Key ergonomics standards include:

• ANSI/HFES 100-2007, Human Factors Engineering of Computer Workstations, which gives detailed design requirements for computer workstations, input devices, displays and furniture.
• ANSI/ASSP A10.40, Reduction of Musculoskeletal Problems in Construction, which gives a framework for identifying and reducing MSD risk in construction work.
• ISO 11228, Ergonomics: Manual handling, an international standard in three parts covering lifting, lowering and carrying (Part 1), pushing and pulling (Part 2), and handling of low loads at high frequency (Part 3).
• ISO 11226, Ergonomics: Evaluation of static working postures, and the NIOSH and ACGIH guidance used in Lessons 5 and 6.

Enforcement and penalties

OSHA can inspect workplaces in response to complaints, referrals, serious injuries and emphasis programs, and can cite employers under the General Duty Clause for ergonomic hazards. OSHA has also used hazard alert letters, which recommend improvements without a citation. Notable cases include ergonomics citations against a major online retailer's warehouses in 2023, which led to a December 2024 corporate-wide settlement requiring ergonomic assessments and controls at its facilities. As of January 2025, the maximum penalty for a serious violation was $16,550 and for a willful or repeated violation $165,514; these amounts are adjusted for inflation each year, so check current figures.

Workers' rights

US workers have the right to a safe workplace, to receive information and training about hazards in a language they understand, to review injury records, to file a confidential complaint with OSHA and request an inspection, and to report injuries without retaliation. Section 11(c) of the OSH Act protects workers from retaliation for exercising these rights, and complaints must generally be filed within 30 days. Several state warehouse laws also give workers the right to see the quotas that apply to them and to know how their work is measured.

Workers' compensation and MSDs

Workers' compensation in the US is state-run and no-fault: workers generally cannot sue their employer for work injuries, and in return receive medical care and wage replacement regardless of fault. To be compensable, an MSD must arise out of and in the course of employment. Acute injuries such as a back strain during a lift are usually accepted. Gradual-onset or cumulative trauma claims, such as carpal tunnel syndrome, often require medical evidence linking the condition to work activities, and rules vary by state. Employers must report injuries to their insurer and, in many states, to the state workers' compensation agency within set deadlines.

Applying the law: an example

Duties beyond the employer

Other parties also have duties. Suppliers and manufacturers must provide equipment that is safe when used as intended, with instructions. Owners and constructors on construction projects must coordinate safety among contractors. Designers and purchasers influence ergonomic risk for decades when they choose buildings, equipment and tools. Temporary staffing agencies and host employers share responsibility for temporary workers. Supervisors have personal duties to ensure workers use controls and to advise them of hazards.

Keeping up with changes

Ergonomics law is not static. Regulators revise MSI provisions, add sector-specific requirements, update guidance and change enforcement priorities, and new standards editions appear every few years. Courts and tribunals also interpret the general duty in new situations, such as remote work, production quotas and electronic monitoring. Assign someone to track changes that affect your workplace, for example by subscribing to regulator and safety association updates, reviewing standards when new editions are published and checking compensation board policies on MSD claims. When requirements change, update your program, procedures and training, and record what was done. A short annual legal review, done with the joint committee or representative, helps make sure the program still meets current law and good practice.

Useful sources in the US include OSHA and State Plan websites, NIOSH, which publishes free research and tools on ergonomics, state workers' compensation agencies and professional bodies such as the Human Factors and Ergonomics Society and the American Society of Safety Professionals.