Score materials by hazard, quantity, and work activity. See mitigation impact from ventilation and PPE. Print results, share with crews, and reduce incidents today.
| Material | Category | Condition | Handling | Quantity | Exposure | Workers | Controls | Score | Rating |
|---|---|---|---|---|---|---|---|---|---|
| Epoxy floor resin | Chemical/solvent | Intact | Manual | 80 kg | 3 h/day, 5 days | 4 | Good ventilation, Basic PPE | 41 | Moderate |
| Concrete grinding dust | Dust-forming | Worn | Grinding | 50 m² | 6 h/day, 7 days | 8 | Fair ventilation, Enhanced PPE | 67 | High |
| Suspected asbestos board | Regulated/high hazard | Friable | Demolition | 25 m² | 4 h/day, 2 days | 3 | Poor ventilation, Basic PPE | 90 | Extreme |
Example scores are illustrative and will vary by site controls.
This calculator uses a weighted scoring model, then scales it to a 0–100 rating. It combines hazard intensity, disturbance potential, exposure, and control effectiveness.
Control multipliers reduce risk when ventilation and PPE improve.
Construction teams often compare multiple products, demolition targets, and waste streams in one shift. A structured rating converts observations into a repeatable score, reducing subjective debate. Using one scale makes it easier to rank tasks, assign competent supervision, and decide when to pause work until controls are upgraded or specialist support is available. Consistent scoring also helps estimate training needs, PPE costs, and disposal planning for each material stream in advance.
The score is built from hazard category, condition, and handling method, then adjusted for quantity and exposure time. Worker count and nearby occupancy raise potential consequence. Control selections reduce residual risk because effective ventilation and suitable PPE lower airborne concentration and contact frequency. Accurate inputs matter more than optimistic selections, so match values to actual site practices.
Low ratings generally suit normal housekeeping, basic segregation, and routine PPE. Medium ratings benefit from wet methods, local extraction, improved signage, and tighter waste handling. High and Extreme ratings typically require permits, air monitoring, containment, and restricted access, plus competent persons to verify controls. Recalculate after changes; a lower score should be earned by measurable improvements.
Save results with the work package, method statement, and daily briefings so the rating travels with the task. Attach the CSV or PDF to show due diligence, note the date and reviewer, and capture assumptions such as hours per day. When conditions change, create a new record and keep the prior one for traceability during audits or incident reviews.
Risk can be reduced before work starts by choosing safer substitutes and planning logistics. Specify low‑VOC products, pre‑cut components, sealed packaging, and supplier certifications to limit handling time and release potential. Request current SDS documents, avoid mixing incompatible chemicals, and schedule regulated or dusty materials when fewer trades are present to reduce exposure and crowding.
It is a comparative indicator of likely harm for a specific task, based on hazard, condition, handling, exposure, and controls. It does not replace legal requirements; it helps prioritize actions and document why certain controls were selected.
Use the product label, Safety Data Sheet, and site history. Select the highest credible category when information is uncertain. For regulated substances, choose the regulated option and verify permits, sampling, or licensed removal requirements before starting.
More material and longer time increase contact probability and airborne release. Even moderate hazards can become high risk when large volumes, repeated cutting, or extended shifts are involved. Capture realistic hours per day and number of days.
Ventilation lowers concentration near the worker, and PPE reduces inhalation and skin contact. Choose the level that will actually be used, including fit testing and maintenance. Upgrading controls should be paired with supervision and training.
Recalculate whenever the task changes: different material, worsened condition, new tools, more workers, changed enclosure, or revised schedule. Also recalculate after adding controls so the reduced score is supported by clear, measurable site improvements.
Yes. Export the CSV or PDF to attach to method statements, toolbox talks, and inspection records. Include assumptions and the reviewer name. Keep versions if conditions change, so your documentation shows an audit trail.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.