Safety
The Safety domain tests OSHA-based hazard control for masonry work: fall protection, scaffolding, wall stability, silica exposure, material handling, and equipment. Questions ask you to identify the required control and the person responsible for verifying it.
Core OSHA requirements
- Fall protection is generally required at 6 ft in construction. Scaffold fall protection is triggered at 10 ft under OSHA 1926.451.
- Masonry construction requires a limited access zone on the side of the wall without scaffolding. The zone extends at least the height of the wall plus 4 ft, and only masonry workers may enter.
- Walls must be braced and stabilized per the plan; do not rely on the wall's own mass during construction.
- Scaffolds must be erected, moved, and altered under a competent person's supervision, fully planked, guardrailed, tied, and not overloaded.
- OSHA 1926.1153 governs respirable crystalline silica. Table 1 tasks, such as hand-held saws used with water, require specified engineering controls; otherwise use dust controls and respiratory protection as required.
- Material handling: inspect pallets and lifting accessories, keep stacks stable, and keep personnel out of crane and forklift travel paths.
Worked example
A crew is building a 12-ft-high wall with no scaffold on the interior side. The limited access zone must extend at least 16 ft from the wall on that side (wall height plus 4 ft). The zone must be barricaded and restricted to masonry workers; the wall must be braced per the construction plan; and the scaffold on the working side must have guardrails and fall protection at 10 ft. The reasoning: the zone keeps other trades out of the collapse area while the wall is unbraced, while the scaffold guardrail addresses the fall hazard.
Traps that cost marks
Applying the 6-ft fall threshold to scaffolds; omitting the limited access zone; dry-cutting masonry without dust controls; and assuming a competent person is only needed at initial erection.
Key points
- General construction fall protection begins at 6 ft; scaffold fall protection begins at 10 ft.
- The limited access zone is at least wall height plus 4 ft on the unscaffolded side.
- A competent person must supervise scaffold erection, alteration, and inspection.
- Silica controls must match the task; water-fed cutting is a common Table 1 control.
- Walls must be braced per plan, and material-handling paths must remain clear.