Mid-size Constructor A · Apartment new-build worksite

Worksite overview

Constructor A was building a 25-floor apartment block in the greater Seoul area. With subcontractor personnel rotating frequently and elevated work concentrated throughout, the company was looking for a system to prevent fall and heat-stroke incidents before they occurred. SenseZero conducted a 6-month PoC using a 4-layer combination of smart watches, helmet beacons, belt beacons, and danger-zone beacons — demonstrating a 32% reduction in high-risk alerts and a 57% reduction in response time.

Problems to solve

1. Frequent subcontractor personnel rotation made it difficult to track safety training completion
2. Site managers could not check in real time whether workers at height were wearing their harnesses
3. No early-detection system for heat-stroke risk during summer months
4. Structural delay in responding within the golden window when a fall occurred

Solutions deployed by SenseZero

• Watch-based heart-rate and activity monitoring for early detection of heat-stroke and overwork signs
• Helmet and belt beacons for real-time detection of hard-hat wearing status and danger-zone entry
• 12 elevated-work zones geofenced — unauthorised entry triggers immediate watch vibration and manager alert
• Non-response alert after a fall appears on the manager dashboard within 5 seconds

Deployment timeline

1. PreparationWeek 1~2

   Site-plan analysis, design of 12 geofence zones, layout plan for 200 beacons

2. InstallationWeek 3~4

   Beacon and watch installation, safety training and system induction for 200 subcontractor workers

3. OperationsMonth 2~5

   Real-time monitoring + weekly report publication. Alert thresholds adjusted twice based on site feedback

4. ValidationMonth 6

   Comparison of prior 3-month vs PoC 6-month incident and alert data, KPI calculation