Video Summary - [26년 대비] 건설안전기사 필기 핵심 암기노트 260제 | 2026년 1회~2018년 최근 9개년 2,860문항 완전분석

Main ideas & concepts covered

The subtitles are a long “core memorization notes” style lecture for the Construction Safety Engineer (건설안전기사) written exam, emphasizing repeatedly asked concepts, formulas, definitions, and step-by-step procedures.

Major sections include:

Accident causation theories (Heinrich vs. Bird) using “domino” models and what to remove to prevent progression.
Accident statistics and indices (severity/frequency/intensity, FSI, loss-day calculations, risk formulas).
Prevention principles and procedures (loss chance principle, causal trigger, countermeasure selection).
Safety education/training framework (3-step / 5C / PDCA / TWI / TBM, lecture/OJT/off-JT, training hours rules, training stages).
Safety management structures & documents (committees, safety manager allocation, workplace safety management regulations, responsible roles).
Risk assessment & human factors psychology
- Risk probability × severity
- defensive/escape/attack mechanisms
- attention limits
- learning/forgetting curves
Measurement/inspection methods
- Pareto, fishbone, control charts
- safety sign categories; color codes
- equipment inspections and validity cycles
Ergonomics and human error models
- MTTF/MTBF-style reliability concepts
- human error types
- load/limit calculations
- compatibility concepts
Construction materials & structural/industrial safety topics
- wood/heat/cement/concrete strength & workability
- asphalt quality
- glass types
- scaffolding standards, formwork
- welding/inspection
Geotechnical & civil works safety
- soil moisture content
- excavation failure modes: heaving/boiling
- retaining walls
- slurry/continuous wall
- underground measurement instruments
Construction schedule/quality tools & project management
- network schedules
- seven QC tools
- value engineering
- contracting methods
Construction safety standards in practice
- work authorization / cost rates
- plan submission/verification timing
- scaffolding/ladders/fall protection criteria

Methodologies / instruction-like content (detailed bullet lists)

1) Domino accident prevention logic (Heinrich → Bird) – “what to remove”

Heinrich “domino” (5 factors, in order)

Social environment & genetic factors
Individual defects
Unsafe behavior
Unsafe conditions
Accident → injury → disaster progression

Prevention mechanism (core idea):

Arrange the dominoes in sequence.
Remove the 3rd domino (unsafe behavior / “middle” unsafe-behavior-related factor, per the subtitle wording) to stop the chain early and prevent escalation.

Bird “domino” alternative

Emphasizes a different basic root:
- Management control / lack of control is treated as the basic cause separating it from Heinrich.
Replaced elimination priority:
- Remove the first domino related to management control / lack of control (per the subtitle’s summary).

2) Heinrich’s “5 steps” for accident prevention (ordered)

Safety management organization
Fact finding (discovery)
Analysis & evaluation
Selection of countermeasures
Application (final execution step)

3) PDCA cycle in safety policy planning (order)

P: Plan — determine current level first, set specific achievable goals
D: Do / Implementation
C: Check — review measures for implementation
A: Action

4) Safety training levels (education/skill/attitude) – “make it stick”

Level 1: Knowledge
- Learn risks + laws/regulations/standards (rules)
Level 2: Function
- Practice according to standard operating procedures
Level 3: Attitude
- Habituation + motivation → “know → do → keep doing”

5) Training hours/requirements pattern (as stated in subtitle rules)

Baseline per semester (under law):
- ~6 hours/semester before revision, with quarterly adjustment mentioned
At hiring: at least 8 hours
If content is changed: 2 hours
Special training: 16 hours
Daily workers: 2 hours
Exam subtitles repeatedly emphasize tiered time increases with risk.

6) Four stages / decision logic in risk assessment (as described)

Identify risk factors
Determine risk
Reduce measures
Record & preserve the process

Risk definition used:

Risk = frequency/probability × severity/importance

7) “Seven tools” for quality control (names + purpose)

Pareto chart: rank causes/problems by frequency/size; bars + cumulative curve
Factor diagram: factor categorization
Histogram: data distribution by frequency
Control chart: check whether a process remains stable (via control limits)
Scatter plot: relationships (correlation-like)
Check sheet by layer: stratified collection
Cause-and-effect (fishbone) diagram: link causes → effects

8) Signal detection theory (4-outcome grid logic)

When deciding whether a signal exists:

Hit: signal present & detected
Miss: signal present but not detected
False alarm: signal absent but detected as present
Correct rejection: signal absent and correctly rejected

The subtitle describes this as four quadrants using axes.

9) Construction risk handling types (four responses)

Avoidance
Reduction
Transfer (e.g., insurance / shift responsibility)
Deferment / postponement

(Emphasized as memorized in that order.)

10) Scheduling slack concepts (network schedule terminology)

Slack: available spare time at an activity (buffer)
Free margin vs. total margin and critical path logic:
- Critical path/process: where margin/slack becomes zero
Dummy nodes: represent virtual operations

11) Scaffolding / fall protection numeric standards (as repeatedly emphasized)

Core rule types (presented as exam-ready checklists with memorization numbers):

Scaffolds: column spacing, tie spacing, bracing, load limits
Suspended scaffolding: platform width and gap restrictions
Fall nets: installation distance and mesh size ≤ 10cm
Ladders/handrails: height, landing intervals, illumination levels, loading assumptions

Main lessons conveyed (exam-focused)

“Memorize numbers & ratios”
- The subtitle repeatedly urges viewers to lock in key numeric relationships (frequencies, indices, safety thresholds).
Prevention is about root causes
- Heinrich model: remove the unsafe-act/unsafe-condition chain link.
- Bird model: emphasize management control as the deepest root.
Use standardized frameworks
- PDCA for policy,
- 5-step accident prevention,
- structured training levels,
- repeatable QC tools,
- standardized inspection checklists/cycles.
Risk is a calculation
- explicitly uses probability × severity/importance logic.
Safety planning is documentation + governance
- committees/roles, plan submission timing, and verification cycles matter.

Speakers / sources featured (as mentioned in subtitles)

David (speaker named: “This is David.”)
Heinrich (Heinrich accident prevention model)
Bird (Bird accident prevention model)
Ebbinghaus (forgetting curve reference)
Thorndike and Skinner (learning theory references)
Dewey (thinking/learning process reference)
Maslow (hierarchy of needs)
Herzberg (hygiene-motivation)
McGregor (Theory X/Y)
McClelland (achievement motivation)
Alderfer (ERG theory)
Adams (equity theory)
Rasmussen (human error framework mentioned)
Lewin (behavior function B = f(P, E))
Hawthorne (Hawthorne experiments)
FMEA / FTA / ETA / SULF (analysis methods)
Müller-Lyer and Hering (perceptual/optical illusion examples; subtitle names are garbled but these illusion types are referenced)
Aron / DuPont (or similar): mentioned in passing (names are partially garbled)
KOSHA (Korea Occupational Safety and Health Agency) (referenced as submission/verification authority)

No other clearly distinct human speaker beyond “David” is identifiable in the subtitles.

[26년 대비] 건설안전기사 필기 핵심 암기노트 260제 | 2026년 1회~2018년 최근 9개년 2,860문항 완전분석 | 이것만 보면 이론 정리 끝!

Key takeaways