Recommendations for preventive measures against hazards at workplaces, Part 1: Falling material hazards prevention
1992 Edition

IS 13416 Part 1 - Scope Overview

• Scope: Addresses safety protocols for scaffolds, platforms, ladders, gangways, trestles, centring, and shuttering ensuring their strength and appropriate design.

• Key Requirement:

  • Clause 3.16 mandates toe boards along all exposed platform edges to halt the fall of loose materials.

• Design Fundamentals:

  • Structures must be robust and properly engineered to avert falling material risks and safeguard workers.

• Additional Notes:

  • Compliance with BIS standards guarantees quality and inspection adherence.
  • Users should verify possession of the most recent edition and updates.

Extract from Clause 3.16

Visual Diagram: Platform Edge Protection

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

This fundamental safety feature reduces falling object hazards on construction sites.

IS 13416 Part 1: Causes and Origins of Falling Objects

Primary Sources (Clauses 2.1 & 2.2)

• Incorrect stacking or transportation of construction/demolition materials.
• Falls originating from:
  • Scaffolds during setup, modifications, or dismantling.
  • Partial or total scaffold failures.
  • Platforms, gangways, and trestles.
  • Cradles, chairs, and skips.
  • Ladders.
  • Open floor, wall, or stair openings.
  • Fragile roofing elements.
  • Sloped or unguarded flat roofs.
  • Structures undergoing demolition.
  • Structural frameworks being erected.
  • Excavation sites.
  • Hoisting equipment.
  • Vehicles unloading materials.

Preventive Strategies

• Secure and correctly stack materials.
• Routine inspection and maintenance of scaffolds.
• Installation of guardrails and toe boards at edges/openings.
• Application of safety nets and barricades.
• Controlled unloading methods.

Safety Factors

• Load factor ranges typically from 1.5 to 2.0 times expected max load.
• Material stacking heights follow IS 875 (Part 3) for storage loads.

graph TD
  A[Sources of Falling Materials] --> B[Scaffolds]
  A --> C[Platforms and Gangways]
  A --> D[Floor and Wall Openings]
  A --> E[Demolition and Excavation]
  A --> F[Material Transport and Unloading]

Summary: Emphasizes safe material handling, scaffold integrity, and guarding openings to prevent falling hazards.

IS 13416 Part 1 emphasizes prevention of falling material hazards at construction sites.

Causes

• Improper stacking or transport of construction/demolition materials (Clause 2.2).
• Unsafe storage practices at elevated positions or unstable platforms.

Preventive Measures

• Proper stacking ensuring stable bases and secure bindings.
• Use of guardrails, toe boards, and safety nets around elevated work areas.
• Utilization of material chutes or controlled drop zones.
• Regular inspection of stored materials and transport devices.
• Provision of personal protective equipment (PPE) such as helmets.

Standard Specifications

Safe Stacking Height Formula

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

• H: Maximum stack height
• B: Stack base width
• θ: Material angle of repose (30°–45° typical)

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

Summary: Highlights correct stacking, physical barriers, and PPE use to prevent falling material dangers on construction sites.

Highlights from IS 13416 Part 1 on Scaffold and Platform Design

1. General Design Criteria (Clause 3.1)

• Scaffolds, platforms, ladders, gangways, trestles, centring, and shuttering materials must possess sufficient strength and be correctly engineered to safely bear loads.
• Design considerations include load capacity, stability, and safety factors.

2. Safety Features for Falling Material Prevention (Clause 3.16)

• Toe boards are mandatory along all exposed platform edges to prevent loose material from falling.
• Platforms should also have guardrails alongside toe boards to protect both workers and materials.

3. Material Stacking on Platforms (Clause 3.2)

• Materials must be stacked securely to avoid overloading and maintain platform stability.

Design Guidelines

Scaffold Safety Feature Diagram

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 Framework]

Recommendations

• Follow IS 13416 in conjunction with IS 456 (concrete) and IS 800 (steel scaffolds).
• Conduct routine inspections and maintenance.
• Employ standardized components and ensure qualified personnel handle erection/dismantling.

Key Points from IS 13416 Part 1 on Material Stacking

• Clause 3.2 requires appropriate stacking on site and platforms to prevent hazards.
• Clause 2.2 identifies improper stacking/transport as a significant cause of falling materials.
• Clause 3.1 mandates that supporting structures be adequately strong and well-designed to safely hold stacked materials.

General Guidelines

• Stack materials on level, firm ground or platforms capable of supporting the load.
• Ensure stack stability by:
  • Using uniform-sized units.
  • Avoiding overhangs or leaning stacks.
  • Limiting stack heights to prevent instability (generally ≤ 1.5 to 2 times base width).
• Maintain sufficient clearance for inspection and handling.
• Use restraints or barriers to prevent accidental displacement.

Stability Formula

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

Example Stack Height Limits

flowchart LR
    A[Proper Stacking] --> B[Level Base]
    A --> C[Stable Geometry]
    A --> D[Height Limit]
    A --> E[Restraints/Barriers]
    B --> F[Strong Supports]

Summary: IS 13416 Part 1 advises stacking on robust platforms, limiting height, ensuring stability, and preventing fall hazards through sound design and handling.

IS 13416 Part 1: Requirements for Railings and Barricades

Relevant Clauses

• Clause 3.3 mandates provision of railings and barricades at all hazardous or vulnerable locations to prevent falls and injuries.
• Clause 3.16 requires toe boards on all exposed edges to prevent loose material falls.
• Clause 3.6 covers use of safety nets, coverings, and barricades for falling material control.

Specifications

• Railing height: Minimum 1 meter above platform or walking surface.
• Intermediate rails: At least one rail between top rail and platform.
• Toe boards: At least 150 mm in height.
• Structural strength: Railings must withstand horizontal loads of about 0.5 kN/m.

Design Parameters

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 resisting 0.5 kN/m load]

Note: Always confirm specific site requirements and latest BIS updates.

IS 13416 Part 1: Specifications on Walkways, Stairs, and Lighting

Walkways and Stairs

• Clause 3.1 requires scaffolds, platforms, gangways, ladders to be structurally sound and properly designed.
• Clause 3.4 mandates that walkways and stairs remain clean, unobstructed, and adequately illuminated.
• Clause 3.16 requires toe boards on platform edges to prevent falling debris.

Lighting

• Clauses 3.4 and 3.9 require sufficient lighting, especially in low visibility or nighttime conditions.
• Lighting should be regularly spaced near trenches and excavations.

Typical Parameters

Toe Board Illustration (Clause 3.16)

graph LR
A[Platform Edge] --> B[Toe Board (150 mm)]
B --> C[Prevents Loose Material Fall]

Summary: Ensure walkways and stairs are structurally safe, clear, and well-lit. Use toe boards on platforms and provide artificial lighting near hazards.

IS 13416 Part 1: Maintenance Guidelines for Tools and Equipment

Key Clauses

• Clause 3.5 requires tools, tackles, and plant machinery to be kept in good working order.
• Clause 3.8 mandates the use of toolboxes to reduce tool-fall risks.
• Clause 3.16 requires toe boards on all exposed platform edges.

Safety Measures

Maintenance Best Practices

• Inspect tools before use for defects.
• Clean and lubricate moving parts.
• Store tools in designated boxes or racks.
• Replace faulty tools promptly.

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

Proper maintenance coupled with protective measures significantly lowers falling material risks.

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

Requirements

• Clause 3.6 mandates safety nets, walkway coverings, and barricades to control falling material risks.
• Clause 3.16 requires toe boards on platform edges to prevent loose debris from falling.

Guidelines

• Safety nets must be installed beneath work zones with falling material risk.
• Coverings should fully shield walkways from debris.
• Toe boards must be at least 150 mm in height and firmly fixed.

Typical Safety Net Parameters

Toe Board Specs

• Height: Minimum 150 mm
• Thickness: 10–20 mm
• Material: Wood or metal, securely fastened

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 Fall]
C -. Catches .-> E
D -. Shields .-> E

Note: Refer to latest BIS updates for compliance. Safety nets and coverings should meet quality and inspection standards.

IS 13416 Part 1 (1992) – Guidelines for Routing Traffic and Personnel

• Clause 3.7 requires planning routes to avoid zones with potential falling material hazards.
• Use designated pathways and overhead protection to minimize risks.
• Clause 3.8 mandates toolboxes to secure tools and reduce accidental drops.
• Clause 3.3 requires railings and barricades at vulnerable points to prevent falls.

Specifications

Diagram: Minimizing Falling Material Risks via Routing

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

Note: IS 13416 emphasizes preventive controls. For specific dimensions and loads on railings, consult IS 456 and relevant safety codes.

IS 13416 Part 1: Tool Boxes and Securing Small Tools

• Clause 3.8 requires toolboxes at worksites to minimize tool-fall risks.
• Clause 3.11 mandates small tools to be tethered to workers’ belts to prevent accidental dropping.
• Clause 3.16 requires toe boards on platform edges to prevent loose material falls.

Summary Table

Recommendations

• Use lockable toolboxes to prevent accidental openings.
• Employ tool lanyards or chains rated for tool weights.
• Toe boards should be minimum 150 mm high.

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

Adhering to these measures aligns with IS 13416 Part 1 safety requirements.

IS 13416 Part 1 (1992) – Guidelines on Material Storage and Night Lighting

Storage Away from Edges (Clause 3.9)

• Excavated materials and other stockpiles must be kept clear of trench edges to avoid collapses and falling hazards.
• A minimum safe distance of approximately 0.5 to 1.0 m is recommended (common engineering practice).

Night Lighting (Clause 3.9)

• Provide sufficient lighting at regular intervals around trenches and excavation sites during night operations.
• Lighting must ensure hazard visibility and safe worker movement.

Edge Protection (Clause 3.16)

• Toe boards, usually 100–150 mm high, must be installed on platform edges to prevent loose material falls.

Summary Table

Conceptual Diagram

graph TD
  A[Excavation Trench] --> B[Safe Storage Zone]
  B -.-> C[At least 0.5–1.0 m from edge]
  A --> D[Night Lighting]
  D --> E[Regularly Spaced Lights]
  A --> F[Platform Edge]
  F --> G[Toe Boards (100–150 mm)]
  G --> H[Prevent Falling Materials]

Note: While IS 13416 provides general guidance, exact distances and lighting levels should be determined via site-specific risk assessments and relevant standards such as IS 3764.

IS 13416 Part 1: Guidelines for Handling and Lowering Materials

Key Points

• Clause 3.10 prohibits throwing materials into trenches; lowering must be controlled and careful.
• Clauses 1.1 and 2.2 emphasize recognizing falling material causes and locations, advocating correct stacking and transport.

Best Practices

• Use mechanical equipment (hoists, cranes) for lowering instead of manual dropping.
• Secure attachments before lowering loads.
• Maintain clear communication among handlers.
• Keep drop zones clear of personnel.

Safety Parameters

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

Summary: IS 13416 Part 1 requires careful, controlled lowering without throwing, secure stacking, and use of mechanical aids to prevent falling hazards.

IS 13416 Part 1: Requirements for Chaining Small Tools to Workers

Key Clauses

• Clause 3.11 mandates small tools be tethered to workers’ belts to avoid accidental drops.
• Purpose is to reduce injury risks from falling tools.
• Complementary measures include toolboxes (Clause 3.8), maintenance (Clause 3.5), and controlled personnel routes (Clause 3.7).

Recommended Specifications

• Chain strength should be at least 5 times the weight of the tool.
• Chain length must allow tool use but prevent free fall (>1.5 m unsafe).
• Attachments should be secure and corrosion-resistant.

Example Chain Strength Table

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

Summary: Chaining small tools to workers is an effective safety practice, requiring proper chain specifications and maintenance per IS 13416 Part 1.

IS 13416 Part 1: Waste Disposal and Refuse Chute Guidelines

Prohibition of Throwing Waste

• Clause 3.12 forbids throwing waste down building sides to prevent falling hazards.

Refuse Chute Use

• Recommended for small waste items.
• Chutes must be designed and maintained to ensure safe, controlled waste descent without blockages.

Handling Large Waste

• Large items require removal via lifting equipment such as hoists or cranes.
• Proper procedures and communication are essential.

Safety Practices

• Cleaning crews should operate after regular work hours to minimize exposure.
• Adequate signage and training for chute use is recommended.

Typical Refuse Chute Parameters

Waste Disposal Flow

flowchart TD
    A[Waste Generated] --> B{Waste Size}
    B -->|Small Items| C[Refuse Chute]
    B -->|Large Items| D[Lifting Equipment]
    C --> E[Safe Disposal]
    D --> E
    E --> F[Cleaning After Hours]
    F --> G[Reduced Hazards]

References: IS 13416-1 (1992) focuses on preventing falling material hazards with waste disposal controls.