Recommendations for preventive measures against hazards at workplaces, Part 1: Falling material hazards prevention

IS 13416 Part 1 - Scope Summary

• Scope: Covers safety requirements for scaffolds, platforms, gangways, trestles, ladders, centring, and shuttering materials to ensure strength and proper design.

• Key Specification:

  • Clause 3.16: All exposed side edges of platforms must have toe boards to prevent falling of loose materials.

• Design Principle:

  • Structures must be strong and properly designed to prevent hazards related to falling materials and ensure worker safety.

• Additional Notes:

  • The standard mark ensures compliance with BIS quality and inspection systems.
  • Users should verify they have the latest edition/amendments.

Important Table Extract (Clause 3.16)

Conceptual Diagram: Platform Safety Edge Protection

graph LR
A[Platform Edge] --> B[Toe Board]
B --> C[Prevents Loose Material Falling]

This simple measure reduces falling hazards on construction sites.

IS 13416 Part 1: Fall of Materials - Causes and Sources

Key Causes and Sources of Falling Materials (Clause 2.1 & 2.2)

• Improper stacking/transport of construction or dismantled materials.
• Falling from:
  • Scaffolds during erection, alteration, dismantling.
  • Scaffold failure (partial/full).
  • Working platforms, gangways, trestles.
  • Cradles, chairs, skips.
  • Ladders.
  • Openings in floors, walls, stairways.
  • Fragile roofing materials.
  • Sloping/unguarded flat roofs.
  • Structures under demolition.
  • Structural framework during erection.
  • Excavation areas.
  • Hoists.
  • Trucks during unloading.

Prevention Measures (Summary)

• Proper stacking and securing of materials.
• Regular scaffold inspection and maintenance.
• Guardrails and toe boards at edges and openings.
• Use of safety nets and barricades.
• Controlled unloading procedures.

No direct formulas or tables in Clause 2, but typical safety factors for scaffold design and load handling include:

• Load factor: 1.5 to 2.0 times the maximum expected load.
• Safety factor for material stacking height: As per IS 875 (Part 3) for storage loads.

graph TD
  A[Falling Materials Sources] --> B[Scaffolds]
  A --> C[Platforms & Gangways]
  A --> D[Openings & Roofs]
  A --> E[Demolition & Excavation]
  A --> F[Transport & Unloading]

Summary: Focus on proper material handling, scaffold safety, and guarding openings to prevent fall hazards.

IS 13416 Part 1 focuses on Falling Materials Hazards Prevention at construction sites.

Key Points & Preventive Measures:

• Causes of Falling Materials:

  • Improper stacking or transportation of construction/dismantled materials (Clause 2.2).
  • Unsafe storage at heights or unstable platforms.

• Prevention Measures:

  • Ensure proper stacking with stable bases and secure bindings.
  • Use guardrails, toe boards, and safety nets around elevated work areas.
  • Employ material chutes or controlled drop zones.
  • Regular inspection of stored materials and transport equipment.
  • Provide personal protective equipment (PPE) like helmets to workers.

Typical Specifications (from general practice aligned with IS standards):

Formula for Safe Stacking Height (H):

[ H = \frac{B}{\tan \theta} ]

• H = maximum stack height
• B = base width of stack
• θ = angle of repose (material dependent, typically 30°-45°)

flowchart TD
    A[Improper Stacking] --> B[Falling Materials]
    C[Preventive Measures] --> D[Guardrails & Toe Boards]
    C --> E[Safety Nets]
    C --> F[Proper Stacking & Binding]
    C --> G[Material Chutes]
    C --> H[PPE Usage]
    B --> I[Hazard Prevention]
    D --> I
    E --> I
    F --> I
    G --> I
    H --> I

Summary: IS 13416 Part 1 emphasizes proper stacking, physical barriers, and PPE to prevent falling materials hazards at construction sites.

Key Points from IS 13416 Part 1: Design & Strength of Scaffolds and Platforms

1. General Design Requirements (Clause 3.1)

• Scaffolds, platforms, gangways, trestles, ladders, centring, and shuttering materials must be strong and properly designed to safely carry loads.
• Design should consider loadings, stability, and safety factors.

2. Safety Measures for Falling Materials (Clause 3.16)

• All exposed side edges of platforms must have toe boards to prevent falling of loose materials.
• Platforms should be equipped with guard rails and toe boards to protect workers and materials.

3. Stacking of Materials (Clause 3.2)

• Materials on platforms should be stacked properly to avoid overloading and maintain stability.

Typical Design Considerations (Based on IS and Engineering Practice)

Summary Diagram: Scaffold Platform Safety Features

graph LR
A[Platform Surface] --> B[Toe Board (≥150 mm)]
A --> C[Guard Rail (≥900 mm)]
A --> D[Proper Material Stacking]
A --> E[Load Bearing Structure]

Recommendations

• Follow IS 13416 along with relevant codes like IS 456 for concrete and IS 800 for steel scaffolds.
• Regular inspection and maintenance are critical.
• Use standardized components and ensure qualified personnel perform erection and dismantling.

For detailed load tables and design formulas, refer to the full IS 13416 Part 1 document and

IS 13416 Part 1: Proper Stacking of Materials - Key Points

• Clause 3.2 mandates proper stacking on worksites and platforms to prevent hazards.
• Clause 2.2 highlights that improper stacking/transport leads to falling materials, a major safety risk.
• Clause 3.1 requires all supporting structures (scaffolds, platforms, ladders) to be strong and well-designed to safely hold stacked materials.

General Specifications for Proper Stacking:

• Stack materials on level, firm ground or platforms designed for the load.
• Maintain stable stacking by:
  • Using uniform-sized units.
  • Avoiding overhanging or leaning stacks.
  • Limiting stack height to prevent instability (typically ≤ 1.5 to 2 times the base width).
• Provide adequate clearance around stacks for inspection and handling.
• Use restraints or barriers to prevent accidental displacement.

Typical Stack Stability Formula:

[ \text{Height} \leq 2 \times \text{Base Width} ]

Example Table: Safe Stack Heights for Common Materials

flowchart LR
    A[Proper Stacking] --> B[Level Ground/Platform]
    A --> C[Stable Stack Geometry]
    A --> D[Limit Stack Height]
    A --> E[Use Restraints/Barriers]
    B --> F[Strong Supporting Structures]

Summary: Follow IS 13416 Part 1 by stacking materials on strong platforms, limiting height, ensuring stability, and preventing fall hazards through proper design and handling.

IS 13416 Part 1: Provision of Railings and Barricades

Key Clauses:

• Clause 3.3: Railings and barricades must be provided at all vulnerable places to prevent falls and injuries.
• Clause 3.16: All exposed side edges of platforms shall have toe boards to prevent falling loose materials.
• Clause 3.6: Falling material hazards are controlled by safety nets, coverings, and barricading.

Specifications for Railings and Barricades:

• Height of railing: Minimum 1 meter above platform/walking surface.
• Intermediate rails: At least one intermediate rail between the top rail and platform.
• Toe boards: Minimum height 150 mm to prevent material fall.
• Material strength: Railings and barricades should be strong enough to resist expected loads (typically 0.5 kN/m applied horizontally).

Typical Design Parameters (IS 13416 + general practice):

Summary Diagram:

graph TD
    A[Platform Edge] --> B[Toe Board (≥150 mm)]
    B --> C[Intermediate Rail]
    C --> D[Top Rail (≥1 m height)]
    D --> E[Railings/Barricades resisting 0.5 kN/m load]

Note: Always verify specific project requirements and consult the latest BIS amendments for updates.

IS 13416 Part 1: Key Specifications for Walkways, Stairs, and Lighting

Walkways & Stairs

• Clause 3.1: All scaffolds, platforms, gangways, ladders, etc., must be strong and properly designed.
• Clause 3.4: Walkways and stairs must be kept clear, clean, and well lit (natural or artificial).
• Clause 3.16: Platforms must have toe boards on exposed edges to prevent falling materials.

Lighting

• Clause 3.4 & 3.9: Adequate lighting should be provided to ensure safety, especially at night or in low visibility areas.
• Lighting should be installed at regular intervals near trenches or excavation sites.

Typical Recommendations (Engineering Practice)

Toe Board and Edge Protection (Clause 3.16)

graph LR
A[Platform Edge] --> B[Toe Board (150 mm height)]
B --> C[Prevents falling of loose materials]

Summary:
Ensure walkways and stairs are structurally sound, unobstructed, and well-lit. Use toe boards on platforms to prevent hazards. Provide artificial lighting at night or in poor visibility zones, especially near trenches.

IS 13416 Part 1: Maintenance of Tools and Equipment

Key Specifications from Clauses:

• Clause 3.5: Tools, tackles, and plants must be maintained in good working condition to ensure safety and efficiency.
• Clause 3.8: Use of tool boxes is mandatory to reduce the risk of tools falling from heights.
• Clause 3.16: All exposed platform edges must have toe boards to prevent falling of loose materials.

Safety Measures Summary (Clause 3.16 Table 3):

Maintenance Best Practices:

• Inspect tools before use for wear or damage.
• Clean and lubricate moving parts regularly.
• Store tools in designated boxes or racks.
• Replace defective tools immediately.

flowchart TD
    A[Tools & Equipment] --> B[Inspection]
    B --> C{Good Condition?}
    C -->|Yes| D[Use]
    C -->|No| E[Repair/Replace]
    D --> F[Store in Tool Boxes]
    F --> G[Prevent Falling Hazards]

Maintaining tools properly and using protective measures like toe boards and tool boxes significantly reduce falling material hazards on site.

IS 13416 Part 1: Use of Safety Nets and Coverings for Falling Material Hazards

Key Specifications:

• Clause 3.6: Falling material hazards must be prevented by:

  • Safety nets
  • Coverings over walkways
  • Barricading hazardous areas

• Clause 3.16: All exposed side edges of platforms shall have toe boards to prevent loose materials from falling.

Safety Net & Covering Guidelines:

• Safety nets should be installed beneath work areas where falling materials pose a risk.
• Coverings must fully protect walkways from falling debris.
• Toe boards should be at least 150 mm high along edges.

Typical Safety Net Parameters (General Engineering Practice):

Toe Board Dimensions:

• Height: 150 mm minimum
• Thickness: 10 to 20 mm
• Material: Wood/metal securely fixed

Summary Diagram:

graph LR
A[Work Platform] --> B[Toe Board (150 mm)]
A --> C[Safety Net below]
A --> D[Covered Walkway]
B -. Prevents .-> E[Loose Material Falling]
C -. Catches .-> E
D -. Shields .-> E

Note: Always refer to the latest BIS amendments for updates. Safety nets and coverings must comply with quality control and inspection as per BIS regulations.

IS 13416 Part 1 (1992) – Routing of Traffic and Personnel: Key Points

• Clause 3.7:

  • Traffic and personnel routes must be planned to avoid areas where falling materials are likely.
  • Use designated pathways or overhead protection to minimize risk.

• Clause 3.8:

  • Provide tool boxes to secure tools and reduce accidental falls.

• Clause 3.3:

  • Install railings and barricades at all vulnerable or hazardous locations to prevent access or accidental falls.

Practical Specifications:

Summary Diagram: Routing to Reduce Falling Material Risk

flowchart LR
    A[Work Area with Falling Material Risk] --> B[Designate Safe Traffic Routes]
    B --> C[Install Railings & Barricades]
    B --> D[Provide Overhead Protection]
    A --> E[Use Tool Boxes to Secure Tools]
    C & D --> F[Personnel & Traffic Safety Ensured]

Note: IS 13416 focuses on preventive measures rather than numerical formulas. For detailed dimensions and loadings on railings, refer to IS 456 or relevant safety codes.

IS 13416 Part 1: Tool Boxes and Securing Small Tools - Key Points

• Clause 3.8: Provision of tool boxes is mandatory to reduce the risk of tools falling from heights.
• Clause 3.11: Small tools should be chained to the belts of workmen to prevent accidental drops.
• Clause 3.16: Toe boards must be installed on all exposed platform edges to prevent loose materials from falling.

Summary Table: Falling Material Hazards Prevention (Clause 3.16)

Practical Recommendations:

• Use lockable tool boxes to prevent accidental opening.
• Use tool lanyards or chains rated for tool weight.
• Toe boards should be at least 150 mm high as per common safety practice.

flowchart LR
    A[Work at Height] --> B[Use Tool Boxes]
    A --> C[Chain Small Tools to Belts]
    A --> D[Install Toe Boards on Platforms]
    B --> E[Reduce Falling Tools Risk]
    C --> E
    D --> E

This ensures compliance with IS 13416 Part 1 for safety against falling tools and materials.

IS 13416 Part 1 (1992) - Key Points on Storage Away from Edges & Lighting at Night

Storage Away from Edges (Clause 3.9)

• Excavated and other materials must be kept away from trench edges to prevent collapse and falling hazards.
• Minimum safe distance is typically at least 0.5 m to 1.0 m from trench edges (common engineering practice, though exact distance not specified in the clause).

Lighting at Night (Clause 3.9)

• Adequate lighting must be provided at regular intervals around trenches and excavation sites during night work.
• Lighting intensity should ensure clear visibility of hazards and safe movement for workers.

Protection from Falling Materials (Clause 3.16)

• All exposed edges of platforms require toe boards to prevent loose materials from falling.
• Toe boards are typically 100-150 mm high.

Summary Table

Conceptual Diagram

graph TD
  A[Excavation Trench] --> B[Safe Storage Zone]
  B -.-> C[Minimum 0.5-1.0 m from edge]
  A --> D[Night Lighting]
  D --> E[Regular intervals for visibility]
  A --> F[Platform Edge]
  F --> G[Toe Boards (100-150 mm)]
  G --> H[Prevents falling materials]

Note: While IS 13416 Part 1 provides general safety clauses, exact distances and lighting intensities should follow site-specific risk assessments and other relevant standards (e.g., IS 3764 for lighting).

IS 13416 Part 1: Handling and Lowering Materials

Key Specifications:

• Clause 3.10:

  • Materials and tools must be lowered carefully into trenches.
  • No throwing of materials is allowed to avoid hazards.

• Clause 1.1 & 2.2:

  • Focus on identifying causes and places of falling materials.
  • Emphasizes proper stacking and transportation to prevent falls.

Best Practices for Handling and Lowering:

• Use mechanical lowering devices (hoists, cranes) instead of manual dropping.
• Ensure secure attachment of loads before lowering.
• Maintain clear communication between handlers and operators.
• Keep the drop zone clear of personnel.

Typical Safety Measures (from engineering practice):

flowchart TD
    A[Material at Surface] --> B[Secure Attachment]
    B --> C[Controlled Lowering]
    C --> D[Material in Trench]
    D --> E[Safe Placement]
    style C fill:#f9f,stroke:#333,stroke-width:2px

Summary: IS 13416 Part 1 mandates careful lowering of materials without throwing, proper stacking, and use of mechanical aids to prevent fall hazards at construction sites.

IS 13416 Part 1: Chaining Small Tools to Workers

Key Specifications:

• Clause 3.11: Small tools must be chained to workers' belts to prevent accidental drops from heights.
• Purpose: Prevent injuries from falling tools by securing them physically.
• Additional Measures:
  • Use toolboxes (Clause 3.8) to store tools when not in use.
  • Maintain tools in good working condition (Clause 3.5) to avoid accidental slips.
  • Control personnel movement to safer routes (Clause 3.7) to reduce falling material risks.

Recommended Chaining Specifications:

• Chain strength: Should withstand at least 5 times the weight of the heaviest tool.
• Length: Sufficient to allow tool use but short enough to prevent free fall (>1.5 m is unsafe).
• Attachment: Secure, corrosion-resistant clips or carabiners.

Example Table: Chain Strength vs Tool Weight

flowchart LR
    A[Worker Belt] --> B[Chain Attachment]
    B --> C[Small Tool]
    C -->|Prevents| D[Tool Falling]

Summary: Chaining small tools to workers is a simple, effective safety measure to prevent falling hazards, supported by proper chain strength, length, and maintenance per IS 13416 Part 1.

IS 13416 Part 1: Waste Material Disposal & Refuse Chutes - Key Points

1. Prohibition of Throwing Waste Down Building Sides

• Clause 3.12 explicitly prohibits discarding waste by throwing down building sides to prevent falling hazards.

2. Use of Refuse Chutes

• Refuse chutes are recommended for small waste items.
• Chutes must be designed and maintained to ensure safe, controlled disposal of waste.
• Material should not cause blockages or hazards during descent.

3. Handling Large Items

• Large waste items must be removed using lifting equipment (hoists/cranes).
• Proper notification and enforcement of these procedures are essential.

4. Safety Measures

• Cleaning teams should operate after work hours to minimize risk.
• Adequate signage and training on chute use and waste disposal are recommended.

Typical Refuse Chute Design Parameters (General Practice)

Preventive Measures Summary

flowchart TD
    A[Waste Generation] --> B{Size of Waste}
    B -->|Small Items| C[Refuse Chute]
    B -->|Large Items| D[Lifting Equipment]
    C --> E[Safe Disposal]
    D --> E
    E --> F[Cleaning Teams after Hours]
    F --> G[Hazard Reduction]

References: IS 13416-1 (1992) focuses on falling material hazard prevention and recommends refuse chutes and lifting equipment as key controls for waste disposal safety.