Safety Inspection Checklist
Overview
Digital safety inspection checklists streamline site safety management. Generate inspection forms, conduct mobile inspections, track findings, and automate compliance reporting.
"Digital checklists reduce inspection time by 60% and improve compliance tracking" — DDC Community
Why Digital Checklists?
| Feature | Benefit |
|---|---|
| Mobile-first | Inspect anywhere on site |
| Photo documentation | Visual evidence attached |
| Real-time sync | Immediate notification of issues |
| Automated reports | Weekly/monthly summaries |
| Trend analysis | Identify recurring hazards |
| Compliance tracking | OSHA/local regulation alignment |
Architecture
┌─────────────────────────────────────────────────────────────────┐
│ SAFETY INSPECTION SYSTEM │
├─────────────────────────────────────────────────────────────────┤
│ │
│ Templates Mobile App Backend │
│ ───────── ────────── ─────── │
│ │
│ 📋 OSHA forms → 📱 Conduct → 💾 Store │
│ 🏗️ Site-specific 📸 Photos 📊 Analyze │
│ ⚡ Quick checks 📍 Location 📧 Alert │
│ ✅ Sign-off 📈 Report │
│ │
└─────────────────────────────────────────────────────────────────┘Technical Implementation
from dataclasses import dataclass, field
from typing import List, Dict, Optional
from enum import Enum
from datetime import datetime
import json
class InspectionType(Enum):
DAILY_SITE = "daily_site"
WEEKLY_SAFETY = "weekly_safety"
SCAFFOLD = "scaffold"
EXCAVATION = "excavation"
ELECTRICAL = "electrical"
CRANE_LIFT = "crane_lift"
HOT_WORK = "hot_work"
CONFINED_SPACE = "confined_space"
FALL_PROTECTION = "fall_protection"
class FindingSeverity(Enum):
CRITICAL = "critical" # Stop work immediately
MAJOR = "major" # Correct within 24 hours
MINOR = "minor" # Correct within 1 week
OBSERVATION = "observation" # Best practice recommendation
class FindingStatus(Enum):
OPEN = "open"
IN_PROGRESS = "in_progress"
CORRECTED = "corrected"
VERIFIED = "verified"
@dataclass
class ChecklistItem:
id: str
category: str
question: str
regulation_ref: str = ""
guidance: str = ""
requires_photo: bool = False
critical: bool = False
@dataclass
class InspectionFinding:
item_id: str
status: str # pass, fail, na
severity: Optional[FindingSeverity] = None
description: str = ""
photo_urls: List[str] = field(default_factory=list)
location: str = ""
assigned_to: str = ""
due_date: Optional[datetime] = None
corrective_action: str = ""
finding_status: FindingStatus = FindingStatus.OPEN
@dataclass
class SafetyInspection:
id: str
inspection_type: InspectionType
project_id: str
project_name: str
location: str
inspector: str
date: datetime
weather: str
workers_on_site: int
findings: List[InspectionFinding] = field(default_factory=list)
overall_score: float = 0.0
signed_off: bool = False
sign_off_by: str = ""
class SafetyInspectionManager:
"""Manage construction safety inspections."""
# OSHA-aligned checklist templates
CHECKLIST_TEMPLATES = {
InspectionType.DAILY_SITE: [
ChecklistItem("DS001", "General", "Site access controlled and secure?", "1926.20"),
ChecklistItem("DS002", "General", "Emergency exits clear and marked?", "1926.34"),
ChecklistItem("DS003", "Housekeeping", "Work areas clean and organized?", "1926.25"),
ChecklistItem("DS004", "Housekeeping", "Waste properly disposed?", "1926.25"),
ChecklistItem("DS005", "PPE", "All workers wearing required PPE?", "1926.28", critical=True),
ChecklistItem("DS006", "PPE", "Hard hats worn in designated areas?", "1926.100"),
ChecklistItem("DS007", "Fall Protection", "Guardrails in place at open edges?", "1926.502", critical=True),
ChecklistItem("DS008", "Fall Protection", "Floor openings covered/protected?", "1926.502"),
ChecklistItem("DS009", "Electrical", "No exposed wiring or damaged cords?", "1926.405"),
ChecklistItem("DS010", "Electrical", "GFCIs in use for power tools?", "1926.404"),
ChecklistItem("DS011", "Fire", "Fire extinguishers accessible?", "1926.150"),
ChecklistItem("DS012", "Fire", "Hot work permits in place?", "1926.352"),
ChecklistItem("DS013", "Equipment", "Equipment inspected before use?", "1926.20"),
ChecklistItem("DS014", "Scaffolding", "Scaffolds properly erected?", "1926.451"),
ChecklistItem("DS015", "Excavation", "Excavations properly sloped/shored?", "1926.652", critical=True),
],
InspectionType.SCAFFOLD: [
ChecklistItem("SC001", "Foundation", "Base plates on solid foundation?", "1926.451(c)"),
ChecklistItem("SC002", "Foundation", "Mudsills adequate for load?", "1926.451(c)"),
ChecklistItem("SC003", "Erection", "Plumb and level?", "1926.451(c)"),
ChecklistItem("SC004", "Erection", "Cross bracing installed?", "1926.451(c)"),
ChecklistItem("SC005", "Platforms", "Fully planked (no gaps >1 inch)?", "1926.451(b)"),
ChecklistItem("SC006", "Platforms", "Planks secured against movement?", "1926.451(b)"),
ChecklistItem("SC007", "Guardrails", "Top rail at 42 inches?", "1926.451(g)"),
ChecklistItem("SC008", "Guardrails", "Mid-rail installed?", "1926.451(g)"),
ChecklistItem("SC009", "Guardrails", "Toeboards at open edges?", "1926.451(h)"),
ChecklistItem("SC010", "Access", "Safe access provided (ladder, stairs)?", "1926.451(e)"),
ChecklistItem("SC011", "Capacity", "Load rating posted?", "1926.451(f)"),
ChecklistItem("SC012", "Inspection", "Competent person inspection tag?", "1926.451(f)"),
],
InspectionType.EXCAVATION: [
ChecklistItem("EX001", "Planning", "Dig permit obtained?", "1926.651"),
ChecklistItem("EX002", "Planning", "Utilities located and marked?", "1926.651(b)", critical=True),
ChecklistItem("EX003", "Soil", "Soil classification completed?", "1926.652(a)"),
ChecklistItem("EX004", "Protection", "Proper sloping/benching?", "1926.652(b)"),
ChecklistItem("EX005", "Protection", "Shoring/shielding in place?", "1926.652(c)"),
ChecklistItem("EX006", "Access", "Safe access within 25 feet?", "1926.651(c)"),
ChecklistItem("EX007", "Spoils", "Spoils 2+ feet from edge?", "1926.651(j)"),
ChecklistItem("EX008", "Water", "Water accumulation controlled?", "1926.651(h)"),
ChecklistItem("EX009", "Atmosphere", "Hazardous atmosphere tested?", "1926.651(g)"),
ChecklistItem("EX010", "Inspection", "Daily inspection by competent person?", "1926.651(k)"),
],
}
def __init__(self):
self.inspections: Dict[str, SafetyInspection] = {}
self.findings_db: List[InspectionFinding] = []
def create_inspection(self, inspection_type: InspectionType,
project_id: str, project_name: str,
location: str, inspector: str,
weather: str = "", workers: int = 0) -> SafetyInspection:
"""Create new inspection from template."""
inspection_id = f"INS-{datetime.now().strftime('%Y%m%d%H%M%S')}"
inspection = SafetyInspection(
id=inspection_id,
inspection_type=inspection_type,
project_id=project_id,
project_name=project_name,
location=location,
inspector=inspector,
date=datetime.now(),
weather=weather,
workers_on_site=workers
)
self.inspections[inspection_id] = inspection
return inspection
def get_checklist(self, inspection_type: InspectionType) -> List[ChecklistItem]:
"""Get checklist template for inspection type."""
return self.CHECKLIST_TEMPLATES.get(inspection_type, [])
def record_finding(self, inspection_id: str, item_id: str,
status: str, severity: FindingSeverity = None,
description: str = "", photos: List[str] = None,
location: str = "", assigned_to: str = "") -> InspectionFinding:
"""Record inspection finding."""
finding = InspectionFinding(
item_id=item_id,
status=status,
severity=severity,
description=description,
photo_urls=photos or [],
location=location,
assigned_to=assigned_to
)
if inspection_id in self.inspections:
self.inspections[inspection_id].findings.append(finding)
if status == "fail":
self.findings_db.append(finding)
return finding
def calculate_score(self, inspection_id: str) -> float:
"""Calculate inspection score (pass rate)."""
if inspection_id not in self.inspections:
return 0.0
inspection = self.inspections[inspection_id]
if not inspection.findings:
return 0.0
applicable = [f for f in inspection.findings if f.status != "na"]
if not applicable:
return 100.0
passed = len([f for f in applicable if f.status == "pass"])
score = (passed / len(applicable)) * 100
inspection.overall_score = score
return score
def get_open_findings(self, project_id: str = None) -> List[InspectionFinding]:
"""Get all open findings, optionally filtered by project."""
open_findings = []
for inspection in self.inspections.values():
if project_id and inspection.project_id != project_id:
continue
for finding in inspection.findings:
if finding.status == "fail" and finding.finding_status in [FindingStatus.OPEN, FindingStatus.IN_PROGRESS]:
open_findings.append(finding)
return sorted(open_findings, key=lambda f: (
0 if f.severity == FindingSeverity.CRITICAL else
1 if f.severity == FindingSeverity.MAJOR else 2
))
def generate_report(self, inspection_id: str) -> str:
"""Generate inspection report."""
if inspection_id not in self.inspections:
return "Inspection not found"
insp = self.inspections[inspection_id]
score = self.calculate_score(inspection_id)
lines = [
f"# Safety Inspection Report",
f"",
f"**Inspection ID:** {insp.id}",
f"**Type:** {insp.inspection_type.value}",
f"**Project:** {insp.project_name}",
f"**Location:** {insp.location}",
f"**Date:** {insp.date.strftime('%Y-%m-%d %H:%M')}",
f"**Inspector:** {insp.inspector}",
f"**Weather:** {insp.weather}",
f"**Workers on Site:** {insp.workers_on_site}",
f"",
f"## Overall Score: {score:.1f}%",
f"",
]
# Summary by severity
critical = [f for f in insp.findings if f.severity == FindingSeverity.CRITICAL]
major = [f for f in insp.findings if f.severity == FindingSeverity.MAJOR]
minor = [f for f in insp.findings if f.severity == FindingSeverity.MINOR]
if critical:
lines.append(f"### CRITICAL FINDINGS ({len(critical)})")
for f in critical:
lines.append(f"- **{f.item_id}**: {f.description}")
lines.append(f" - Location: {f.location}")
lines.append(f" - Assigned: {f.assigned_to}")
lines.append("")
if major:
lines.append(f"### Major Findings ({len(major)})")
for f in major:
lines.append(f"- **{f.item_id}**: {f.description}")
lines.append("")
if minor:
lines.append(f"### Minor Findings ({len(minor)})")
for f in minor:
lines.append(f"- {f.item_id}: {f.description}")
lines.append("")
return "\n".join(lines)
def generate_weekly_summary(self, project_id: str, week_start: datetime) -> Dict:
"""Generate weekly safety summary."""
week_inspections = [
insp for insp in self.inspections.values()
if insp.project_id == project_id
and insp.date >= week_start
]
total_findings = sum(len([f for f in insp.findings if f.status == "fail"])
for insp in week_inspections)
critical_count = sum(
len([f for f in insp.findings if f.severity == FindingSeverity.CRITICAL])
for insp in week_inspections
)
avg_score = sum(insp.overall_score for insp in week_inspections) / len(week_inspections) if week_inspections else 0
return {
"week_start": week_start.isoformat(),
"inspections_conducted": len(week_inspections),
"total_findings": total_findings,
"critical_findings": critical_count,
"average_score": avg_score,
"trend": "improving" if avg_score > 85 else "needs_attention"
}Quick Start
# Initialize manager
manager = SafetyInspectionManager()
# Create daily inspection
inspection = manager.create_inspection(
inspection_type=InspectionType.DAILY_SITE,
project_id="PRJ-001",
project_name="Office Tower",
location="Building A - Level 5",
inspector="John Smith",
weather="Clear, 72F",
workers=45
)
# Get checklist items
checklist = manager.get_checklist(InspectionType.DAILY_SITE)
for item in checklist[:5]:
print(f"{item.id}: {item.question}")
# Record findings
manager.record_finding(
inspection.id,
item_id="DS005",
status="fail",
severity=FindingSeverity.MAJOR,
description="3 workers without safety glasses in welding area",
location="Level 5, Grid C-4",
assigned_to="Site Foreman"
)
# Calculate score and generate report
score = manager.calculate_score(inspection.id)
print(f"Inspection Score: {score:.1f}%")
report = manager.generate_report(inspection.id)
print(report)Integration with n8n
{
"workflow": "Safety Inspection Alert",
"trigger": "New critical finding recorded",
"nodes": [
{"type": "Webhook", "event": "finding.critical"},
{"type": "Email", "to": "safety@company.com", "subject": "CRITICAL Safety Finding"},
{"type": "Slack", "channel": "#safety-alerts"},
{"type": "Database", "action": "log_incident"}
]
}Requirements
pip install (no external dependencies - uses standard library)Resources
- OSHA Construction Standards: https://www.osha.gov/construction
- Safety inspection best practices
- Mobile inspection apps integration