Masonry Jobsite Hazards and OSHA 10 Fundamentals

Why OSHA Matters on a Masonry Site

Masonry work is physically demanding and takes place in environments where serious injuries can happen quickly. The U.S. Occupational Safety and Health Administration (OSHA) sets legally enforceable standards that protect workers on construction sites. The relevant body of rules is found in 29 CFR 1926, OSHA's Construction Industry Standards. Understanding these rules is not just about passing a test—it is about going home in one piece every day.

The OSHA 10-hour Construction Outreach course introduces workers to the most common and most dangerous hazard categories on construction sites. For masonry, five categories deserve special attention: falls, silica dust, scaffolding, struck-by hazards, and caught-in/between hazards.

The Four Leading Causes of Construction Fatalities

OSHA and the construction industry refer to the four most common fatal hazard types as the Fatal Four:

1. Falls – the leading killer in construction

2. Struck-by – being hit by a vehicle, falling object, or flying debris

3. Caught-in/between – body parts or clothing caught in machinery, or a worker caught between a moving object and a fixed surface

4. Electrocution – contact with energized sources

Masonry workers regularly face the first three on this list. Recognizing them before work begins is the first step in controlling them.

Fall Protection

When working at heights of 6 feet or more above a lower level on a construction site, OSHA requires fall protection (29 CFR 1926 Subpart M). Acceptable systems include guardrail systems, personal fall arrest systems (PFAS), and safety net systems. A PFAS includes a full-body harness, a lanyard or self-retracting lifeline, and a secure anchor point capable of supporting the required load. Workers must be trained on whatever system is in use before they use it.

Masonry workers frequently work from ladders as well. Extension ladders must be set at the correct angle (approximately 1 foot out for every 4 feet of height), extend at least 3 feet above the landing surface, and be secured at the top and bottom where possible.

Scaffolding

Most brick and block work above ground level is done from supported scaffolds. OSHA's scaffold standard (29 CFR 1926 Subpart Q) requires that scaffolds be designed and erected by a competent person—someone with the training and authority to identify hazards and correct them. Key rules include:

• Scaffold platforms must be fully planked and at least 18 inches wide.
• Guardrails are required on open sides and ends of scaffolds 10 feet or more above a lower level.
• Workers must be trained before working on or near a scaffold.
• Scaffolds must not be overloaded beyond their rated capacity.
• Scaffolds may not be erected, moved, or dismantled during high winds or other hazardous weather without direction from a competent person.

Silica Dust

Cutting, grinding, drilling, or tuck-pointing masonry materials releases respirable crystalline silica—particles small enough to reach deep lung tissue. Long-term exposure causes silicosis, an irreversible and potentially fatal lung disease, as well as increased risk of lung cancer and kidney disease.

OSHA's Silica in Construction standard (29 CFR 1926.1153) requires employers to:

• Limit worker exposure to silica at or below the Permissible Exposure Limit (PEL) established in the standard.
• Use engineering controls first—water suppression or local exhaust ventilation attached to tools—before relying on respirators.
• Provide medical surveillance for workers regularly exposed above defined action levels.
• Train workers about silica hazards and controls.

When engineering controls alone are insufficient, respiratory protection is required. An N95 respirator filters at least 95% of airborne particles and is appropriate for many masonry dust tasks. A P100 respirator provides higher filtration and is used when exposure levels are higher or the employer's written exposure control plan specifies it. Respirators must fit properly; facial hair that breaks the face seal makes a tight-fitting respirator ineffective.

Struck-By and Caught-In/Between Hazards

Struck-by hazards on masonry sites include falling bricks or blocks from upper scaffolding levels, swinging loads from forklifts or cranes, and vehicles operating near workers. Controls include toe boards and debris nets on scaffolds, hard hats (ANSI-rated), high-visibility vests near traffic, and clear communication with equipment operators.

Caught-in/between hazards arise when workers reach into unguarded machinery (such as mortar mixers) or stand between moving equipment and a fixed structure. Machine guards must never be removed while equipment is running. Before performing any maintenance or clearing a jam, workers must follow lockout/tagout (LOTO) procedures per 29 CFR 1910.147 to de-energize equipment and prevent accidental startup.

Employer and Worker Rights and Responsibilities

OSHA establishes a clear division of duties:

Employers must: provide a workplace free of recognized hazards, comply with OSHA standards, provide required PPE at no cost to workers, train workers in a language they understand, and not retaliate against workers who report hazards.

Workers have the right to: receive safety training, review OSHA standards and the employer's injury records (OSHA 300 log), report injuries and illnesses, file a complaint with OSHA without fear of retaliation, and refuse work they have a good-faith belief poses imminent danger.

Workers are responsible for: following safety rules, using PPE correctly, reporting hazards to their supervisor, and participating in training.

The Hierarchy of Controls

When a hazard is identified, controls should be applied in this order of preference:

1. Elimination – remove the hazard entirely

2. Substitution – replace it with something less hazardous

3. Engineering controls – isolate workers from the hazard (guarding, ventilation)

4. Administrative controls – change how or when the work is done

5. PPE – protect the worker as a last line of defense

PPE is always the last resort, not the first solution, because it does nothing to eliminate the hazard itself.

Job Hazard Analysis

A Job Hazard Analysis (JHA), also called a Job Safety Analysis (JSA), is a written tool that breaks a task into steps, identifies the hazard in each step, and documents the control measure. Completing a JHA before a task begins forces workers and supervisors to think through risks before anyone is exposed to them. On regulated sites, JHAs may be required by the general contractor and are considered a best practice on all sites.