Occupational Health, Safety and Environment on Masonry Sites
Core concepts
Every mason must be able to spot a hazard, judge the risk and act before work starts. Know the hierarchy of control: eliminate, substitute, engineer the risk out (guards, wet cutting, shoring), then administrative controls (permits, toolbox talks, rotation), and only then personal protective equipment. PPE is the last line of defence, not the first. Minimum PPE on a Sri Lankan masonry site: hard hat, safety boots, high-visibility vest, gloves, eye protection, and a dust mask when cutting or chiselling.
Site-specific hazards
- Silica dust from cutting blocks, bricks and stone. Use wet cutting or extraction, and a suitable respirator.
- Cement and lime burns. Wet cement is strongly alkaline and burns through clothing; wash skin immediately.
- Manual handling. A standard cement bag is 50 kg; use two people or a mechanical aid.
- Falls. Guardrails and toe boards on scaffolds, ladders set at 1 in 4, no work above unprotected edges.
- Excavations. Battering or shoring is required once a trench is deep enough to bury a person (about 1.5 m), and spoil goes well back from the edge.
- Electricity, noise, heat stress and poor housekeeping.
Environment
Control dust with water, use silt traps before drains, separate waste (rubble, timber, metal, packaging), never burn rubbish on site, and keep cement and chemical spills away from waterways.
Traps in questions
Candidates often pick PPE as the first control, or assume a hard hat removes the need for a catch platform. Also remember that a near miss must be reported, and that only a competent, authorised person may alter scaffolding or shoring.
Worked rule of thumb
Ladder set-up: 1 out for every 4 up. A 4 m ladder must stand with its foot about 1.0 m from the wall, and should extend roughly 1 m above the landing.