Common Work Results for Masonry AHA (Activity Hazard Analysis / Job Hazard Analysis)
Updated 2026-06-23
A Common Work Results for Masonry AHA (Activity Hazard Analysis / Job Hazard Analysis) is the plan that keeps the masonry crew safe from the mortar and masonry silica and caustic contact, through the masonry wall and scaffold access and stability, and around the material handling and ergonomics. Common work results for masonry covers the shared, foundational work of masonry construction — combining the mortar and masonry-silica and caustic-contact hazard, the masonry-wall and scaffold-access/stability hazard, and the material-handling and ergonomics hazard. This guide walks through building a Common Work Results for Masonry AHA that names the mortar-masonry-silica/ caustic-contact, masonry-wall/scaffold-access-stability, and material-handling/ergonomics hazards and assigns the silica/contact, access/stability, and handling controls that hold up in the field.
Why common work results for masonry needs its own AHA
Common work results for masonry is the foundational, shared body of masonry work — the common results, methods, and requirements underlying masonry construction (laying brick, block, and stone in mortar; building masonry walls; the mortar, grout, reinforcement, and accessories common to masonry). This closes the batch and serves as the masonry-fundamentals AHA underlying the specific masonry activities. The defining feature is the core masonry work: mixing and working mortar (caustic cement contact, and silica in mortar/masonry), building masonry walls (scaffold access and the critical stability of masonry walls under construction — an unbraced fresh masonry wall can collapse), and the heavy, repetitive material handling of masonry. The hazards combine the mortar and masonry-silica and caustic-contact (mixing/working mortar and cutting masonry — the caustic-contact hazard (mortar is cement-based and caustic — skin contact, cement burns) and the silica hazard (mortar and masonry contain silica — mixing and especially cutting masonry generate respirable silica)), the masonry-wall and scaffold- access/stability (building masonry walls from scaffolds — the scaffold access/fall hazard and the masonry-wall- stability hazard (a freshly laid, unbraced masonry wall can collapse, especially under wind or before the mortar cures — a serious masonry hazard requiring bracing)), the material-handling and ergonomics (the heavy, repetitive handling of masonry units, mortar, and materials — the material-handling and ergonomic hazards), and the falling- material. The mortar-masonry-silica/caustic-contact and the masonry-wall/scaffold-access-stability justify a dedicated AHA.
Breaking common work results for masonry into steps
The steps for a Common Work Results for Masonry AHA follow the masonry work:
- Set up the masonry scaffold access and material staging
- Mix the mortar (caustic contact, dust control)
- Lay the masonry units in mortar (handling, ergonomics)
- Brace the masonry wall as it is built (wall stability)
- Cut masonry units as required (silica control)
- Manage the contact, access, and handling hazards
- Point, clean, and cure the masonry
- Complete
Each step carries a hazard, and the mortar-masonry-silica/caustic-contact, the masonry-wall/scaffold-access- stability, and the material-handling/ergonomics are where the most significant risks concentrate.
The hazards step by step
Mortar and masonry-silica and caustic-contact
Mixing/working mortar and cutting masonry — the caustic-contact hazard (mortar is cement-based and caustic — skin contact, cement burns) and the silica hazard (mortar and masonry contain silica — mixing and especially cutting masonry generate respirable silica). The controls are preventing skin contact with the caustic mortar (mortar is cement-based and caustic — gloves, skin protection, since prolonged contact causes cement burns, and masons work with mortar constantly), silica control for mixing mortar and cutting masonry (mixing mortar creates some dust, and cutting masonry units generates respirable silica — dust control, respiratory protection, wet cutting/dust extraction for cutting), eye protection, and the contact/silica controls. The mortar-masonry-silica/caustic- contact is a defining hazard — mortar is caustic and masonry work generates silica. (These follow the cement- contact and silica fundamentals.)
Masonry-wall and scaffold-access/stability
Building masonry walls from scaffolds — the scaffold access/fall hazard and the masonry-wall-stability hazard (a freshly laid, unbraced masonry wall can collapse, especially under wind or before the mortar cures — a serious masonry hazard requiring bracing). The controls are safe masonry scaffold access (properly erected masonry scaffolds, fall protection), and critically the masonry-wall-stability control (a freshly laid masonry wall is not stable until the mortar cures and it is braced/supported — unbraced masonry walls under construction can collapse, especially under wind, so bracing masonry walls during construction per the limits (there are specific requirements limiting the height of unbraced masonry walls and requiring bracing), and establishing a limited access/exclusion zone behind a wall being built or braced), and the access/stability controls. The masonry-wall/ scaffold-access-stability is a defining hazard — unbraced fresh masonry walls can collapse. (These follow the masonry-wall-bracing and scaffold fundamentals.)
Material-handling and ergonomics
The heavy, repetitive handling of masonry units, mortar, and materials — the material-handling and ergonomic hazards. The controls are safe material handling (masonry units, mortar, materials — hoisting to the scaffold, staging), managing the masonry ergonomics (masonry is heavy, repetitive work — lifting units and mortar, bending, reaching — significant ergonomic strain), and the handling/ergonomic controls. The material-handling/ergonomics is a defining hazard — masonry is heavy, repetitive work. (These follow the material-handling and ergonomic fundamentals.)
Falling-material
The falling material (tools, units, mortar falling from the scaffold/wall) carries the falling-object hazard. The controls are falling-object protection (toe boards, controlled access below, hard hats), and the falling-material controls. (These follow the falling-object fundamentals.)
A simple Common Work Results for Masonry AHA structure
| Step | Hazard | Control | Standard |
|---|---|---|---|
| Set up access | Fall | Set up scaffold access and material staging | OSHA 1926.451 |
| Mix mortar | Caustic / dust | Mix the mortar (caustic contact, dust control) | OSHA 1926.1153 |
| Lay units | Ergonomic | Lay the masonry units in mortar (handling, ergonomics) | project |
| Brace wall | Wall collapse | Brace the masonry wall as it is built (wall stability) | OSHA 1926.706 |
| Cut units | Silica | Cut masonry units as required (silica control) | OSHA 1926.1153 |
| Point/clean | Contact | Point, clean, and cure the masonry | project |
Mortar-contact/silica control and masonry-wall stability safety
A Common Work Results for Masonry AHA centers on mortar-contact/silica control and masonry-wall stability safety. The mortar-contact/silica control addresses the caustic mortar and the masonry silica — controlled by preventing skin contact with the caustic mortar (masons work with mortar constantly, and it causes cement burns) and silica control for mixing mortar and cutting masonry. The masonry-wall stability safety addresses the scaffold access and the wall — controlled by safe masonry scaffold access with fall protection, and the masonry-wall-stability control (bracing masonry walls during construction and limiting unbraced wall height, with exclusion zones — unbraced fresh masonry walls collapse). And the material handling and falling material get handling and falling-object controls. An AHA built on mortar-contact/silica control and masonry-wall stability safety, with handling controls, addresses the hazards that define common work results for masonry.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, common work results for masonry covers the foundational, shared work of masonry construction, and it closes this batch as the masonry-fundamentals AHA underlying the specific masonry activities. Its defining hazards are the core masonry hazards. The mortar and masonry-silica and caustic-contact hazard is a primary defining concern — masonry work is built on mortar, which is cement-based and therefore caustic, and masons work with mortar constantly and in close contact, so prolonged skin contact with mortar causes cement burns (the same cement-burn hazard as concrete), controlled by preventing skin contact (gloves and skin protection); and masonry work generates silica, both from mixing mortar (some dust) and especially from cutting masonry units (cutting brick, block, and stone generates respirable silica — the same high-silica cutting hazard as the concrete-cutting cluster), controlled by silica control (dust control, respiratory protection, wet cutting or dust extraction for cutting units). The caustic mortar and the silica from cutting are the material hazards that run through all masonry work.
The masonry-wall/scaffold-access-stability and the material-handling/ergonomics are the other defining hazards, and the wall stability is the one with catastrophic potential. On the projects I have run, masonry walls are built from scaffolds (so scaffold access and fall protection are controls), but the defining structural hazard of masonry construction is the stability of the masonry wall as it is being built: a freshly laid masonry wall is NOT stable until the mortar cures and it is properly braced or supported, and unbraced masonry walls under construction can collapse — especially under wind loads, which can topple a tall, freshly laid, unbraced wall, killing workers on or near it. There are specific requirements limiting the height of unbraced masonry walls and requiring bracing, so bracing masonry walls during construction and keeping people out of the area behind a wall being built or braced (a limited access/exclusion zone) are critical controls. Unbraced masonry wall collapse, particularly from wind, is a recognized masonry-construction killer. And the material-handling/ergonomics hazard is significant because masonry is heavy, repetitive work — constantly lifting masonry units and mortar, bending, and reaching — a major ergonomic strain, controlled by safe material handling (hoisting to the scaffold, staging) and ergonomic management. The falling material from the scaffold and wall rounds it out. This closes the batch and heads the masonry division. The AHA built on mortar-contact/silica control and masonry-wall stability safety is the one that protects the masonry crew.
The bottom line
A Common Work Results for Masonry AHA names the mortar-masonry-silica/caustic-contact, the masonry-wall/scaffold- access-stability, and the material-handling/ergonomics hazards with specific controls — preventing skin contact with the caustic mortar and silica control for mixing and cutting masonry, safe scaffold access plus bracing masonry walls during construction (an unbraced fresh masonry wall can collapse, especially under wind), and safe handling of the heavy, repetitive masonry work. The mortar-contact/silica control and the masonry-wall stability safety are the defining concerns. The AHA that manages both is the one that protects the crew.
Frequently asked questions
What mortar and silica hazards apply to masonry work?
Masonry work is built on mortar, which is cement-based and caustic, and masons work with it constantly and in close contact, so prolonged skin contact causes cement burns; masonry work also generates silica, from mixing mortar (some dust) and especially from cutting masonry units (cutting brick, block, and stone generates respirable silica). Controls are preventing skin contact with the caustic mortar (gloves, skin protection), silica control for mixing mortar and cutting masonry (dust control, respiratory protection, wet cutting/dust extraction for cutting), eye protection, and the contact/silica controls.
Why is masonry-wall stability the defining structural hazard?
A freshly laid masonry wall is NOT stable until the mortar cures and it is properly braced or supported, and unbraced masonry walls under construction can collapse — especially under wind loads, which can topple a tall, freshly laid, unbraced wall, killing workers on or near it (a recognized masonry-construction killer). Controls are safe masonry scaffold access with fall protection, and the masonry-wall-stability control (bracing masonry walls during construction per the limits on unbraced wall height, establishing a limited access/exclusion zone behind a wall being built or braced), and the access/stability controls.
What handling and ergonomic hazards apply?
Masonry is heavy, repetitive work — constantly lifting masonry units and mortar, bending, and reaching — a major ergonomic strain. Controls are safe material handling (masonry units, mortar, materials — hoisting to the scaffold, staging), managing the masonry ergonomics (the heavy, repetitive lifting/bending/reaching), and the handling/ergonomic controls.
What is common work results for masonry?
Common work results for masonry is the foundational, shared body of masonry work — the common results, methods, and requirements underlying masonry construction (laying brick, block, and stone in mortar; building masonry walls; the mortar, grout, reinforcement, and accessories common to masonry). Because mortar is caustic and masonry work generates silica, masonry walls under construction can collapse if unbraced, and the work is heavy and repetitive, those hazards apply.
Related AHAs and JHAs
- Maintenance of Unit Masonry AHA — the unit-masonry maintenance
- Maintenance of Stone Assemblies AHA — the stone-assembly maintenance
- Masonry and Block Wall Construction JHA — the masonry-construction fundamentals
- Stone Installation JHA — the stone-installation fundamentals
Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.