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IS 13415:1992 is the Indian Standard (BIS) for safety in roof work - code of practice. This code of practice outlines safety requirements for working on roofs of buildings. It details procedures for safe access, precautions for working on sloping and fragile roofs, and specifies requirements for safety equipment like ladders, crawling boards, safety nets, and personal harnesses.
Lays down safety requirements and precautions for working on roofs, including access, edge protection, and material handling.
! Extreme caution is required when working on 'fragile roofs' (e.g., asbestos, plastic sheets) as specified in Clause 7; always use crawling boards.
! Ensure all safety equipment, especially harnesses and nets, are not only compliant with their respective IS codes but also inspected for damage before each use.
! Properly securing access ladders by tying them off at the top and bottom (Clause 5.1.4) is a fundamental and critical first step for any roof work.
Provides specific practical guidance on planning and safely carrying out roof work, directly matching the IS code's intent.
29 CFR 1926 Subpart MOSHA (US)
MediumCurrent
Fall Protection
A mandatory regulation covering fall protection in all construction, with roofing being a primary focus area.
The Work at Height Regulations 2005HSE (UK)
MediumCurrent
The Work at Height Regulations 2005
The legal framework in the UK governing all work at height, which underpins the practical guidance found in HSG33.
Code of Practice: Managing the Risk of Falls at WorkplacesSafe Work Australia (AU)
HighCurrent
Code of Practice: Managing the Risk of Falls at Workplaces
A modern code of practice establishing a risk management approach to preventing falls, with extensive application to roofing.
Key Differences
≠Modern international standards (e.g., UK HSE's) are built on a mandatory, formal risk assessment and a strict hierarchy of controls (Avoid work at height > Prevent falls > Mitigate consequences). IS 13415 provides recommendations but does not formalize this hierarchical, risk-based approach to the same extent.
≠IS 13415:1992 specifies fall protection for work at or above 2 meters. Modern regulations like the UK's Work at Height Regulations 2005 define 'work at height' as any situation where a fall could cause personal injury, making it risk-based rather than based on a fixed height threshold.
≠While IS 13415 addresses fragile roofs, modern guidance like HSE's HSG33 is far more stringent. It presumes all roofs are fragile until proven otherwise by a competent person and heavily prioritizes avoiding access altogether as the primary control measure.
≠International standards like OSHA and HSE place a strong, explicit emphasis on the documented competence and formal training of all individuals involved in roof work. IS 13415 refers to 'experienced' and 'responsible' persons but lacks the detailed framework for competency assessment and record-keeping.
Key Similarities
≈Both the IS code and its international counterparts recognize the fundamental fall protection systems, including the use of guardrails (edge protection), safety nets, and personal fall arrest systems (safety harnesses and lanyards).
≈A core principle shared by both IS 13415 and international standards is the requirement for safe access and egress to the roof, recommending properly secured ladders, stair towers, or scaffolding.
≈All standards explicitly prohibit roof work during adverse weather conditions, such as high winds, heavy rain, ice, or snow, acknowledging the increased risk.
≈The principles for safe material handling are consistent, including ensuring the roof is not overloaded, materials are secured against wind, and proper lifting/hoisting techniques are used.
Parameter Comparison
Parameter
IS Value
International
Source
General fall protection trigger height
2 m or more above ground/floor level.
6 feet (≈1.8 m) for construction.
OSHA 29 CFR 1926.501(b)(1)
Guardrail top rail height
Not less than 900 mm.
42 inches (≈1.1 m), +/- 3 inches.
OSHA 29 CFR 1926.502(b)(1)
Toeboard minimum height
150 mm.
3.5 inches (≈9 cm).
OSHA 29 CFR 1926.502(b)(9)
Maximum fall distance into a safety net
6 m below the working platform.
30 feet (≈9.1 m) below the working level.
OSHA 29 CFR 1926.502(c)(1)
Ladder extension above landing
At least 1 m.
At least 3 feet (≈0.9 m).
OSHA 29 CFR 1926.1053(b)(1)
Strength requirement for guardrail top rail
Qualitative: 'of adequate strength'.
Quantitative: Must withstand a 200-pound (≈890 N) force.
OSHA 29 CFR 1926.502(b)(3)
Opening size in safety nets
Not to exceed 100 mm x 100 mm.
Maximum 36 square inches (e.g., 6"x6" or ≈15cm x 15cm).
OSHA 29 CFR 1926.502(c)(4)(i)
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Minimum width of roof ladders or crawling boards430 mm
What is the primary requirement for working on a fragile roof?+
Workers must use crawling boards or roof ladders of adequate strength, with a minimum width of 430 mm, to distribute their weight (Clause 7.2).
How high must guard-rails be on a roof edge?+
Guard-rails should have a top rail at least 900 mm above the platform, along with an intermediate rail and a toe-board (Clause 4.3).
When should safety nets be used?+
Safety nets should be used where providing guard-rails, platforms, or other measures is not practicable. They must be positioned to prevent a fall of more than 6 meters (Clause 8.1).
What is the correct way to use a ladder for roof access?+
The ladder should be set at a slope not steeper than 1 horizontal to 4 vertical, rest on a firm base, be securely tied, and extend at least 1 m above the landing place (Clause 5.1).