Link points to Internet Archive / others. Not hosted by InfraLens. Details
IS 13915:1994 is the Indian Standard (BIS) for prefabricated steel modular scaffolds - specification. This standard specifies the requirements for materials, components, dimensions, and performance for prefabricated modular steel scaffolds. It covers standards (verticals), ledgers (horizontals), transoms, and accessories to ensure their strength, stability, and interchangeability for use in construction and maintenance.
Specifies requirements for prefabricated steel modular scaffolds, their components, and assemblies.
Overview
Status
Current
Usage level
Specialized
Domain
Structural Engineering — Scaffolding, Formwork and Construction Equipment
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Ensure all components are from the same manufacturer or system to guarantee compatibility and load-carrying capacity as per testing.
! Visually inspect all components for damage, corrosion, or distortion before erection, as this code's specifications apply only to components in good condition.
! Verify the manufacturer's mark and the third-party inspection mark on components as specified in Clause 9 to ensure compliance.
EN 12811-1:2003CEN (European Committee for Standardization), Europe
HighCurrent
Temporary works equipment - Part 1: Scaffolds - Performance requirements and general design
Defines general performance requirements and design methods for all scaffold systems, including modular types.
EN 12810-1:2003CEN (European Committee for Standardization), Europe
HighCurrent
Façade scaffolds made of prefabricated components - Part 1: Products specifications
Specifies requirements for particular prefabricated facade scaffold systems, similar to the intent of IS 13915.
ANSI/ASSP A10.8-2019ANSI (American National Standards Institute) / ASSP (American Society of Safety Professionals), USA
MediumCurrent
Scaffolding Safety Requirements
Covers safety requirements for design, erection, and use of scaffolds, including prefabricated modular systems.
AS/NZS 1576.1:2010Standards Australia / Standards New Zealand, Australia/New Zealand
MediumCurrent
Scaffolding - Part 1: General requirements
Provides performance requirements and test methods for scaffolding components and equipment in general.
Key Differences
≠IS 13915 is primarily a prescriptive standard specifying dimensions and material grades, while modern standards like EN 12811-1 are performance-based, allowing for design by calculation using Limit State Design (LSD) principles.
≠The service load classifications differ. IS 13915 specifies Light (2.0 kN/m²), Medium (3.6 kN/m²), and Heavy (5.0 kN/m²) duties. EN 12811-1 defines six load classes, with Class 4 (3.0 kN/m²) being a common equivalent to Medium duty.
≠Material specifications are tied to national standards. IS 13915 refers to Indian steel grades like Yst 240 (240 MPa yield) from IS 1161, whereas EN standards refer to European grades like S235 (235 MPa yield) from EN 10025.
≠Wind load calculations are based on different national codes. IS 13915 references IS 875 (Part 3), while European standards use Eurocode 1: Actions on structures (EN 1991-1-4).
Key Similarities
≈The most common nominal outside diameter for vertical standards and horizontal ledgers is 48.3 mm in both IS 13915 and most international standards, ensuring some compatibility with standard couplers.
≈The fundamental components of the scaffold systems are the same, consisting of vertical standards, horizontal ledgers, transoms, diagonal bracing, and adjustable base jacks.
≈All standards mandate key safety features for working platforms, including the provision of top guardrails, intermediate guardrails, and toeboards to prevent falls of persons and materials.
≈The primary material specified for the main structural components in all these standards is steel, chosen for its strength, durability, and reliability.
≈All codes emphasize the critical importance of a stable foundation, requiring the use of base plates and sole boards (or sole plates) to distribute loads safely to the ground.
Parameter Comparison
Parameter
IS Value
International
Source
Standard Tube Outer Diameter
48.3 mm (for nominal bore 40 mm tube)
48.3 mm
EN 12811-1:2003
Design Methodology
Permissible / Working Stress Design
Limit State Design (LSD)
EN 12811-1:2003
Live Load (Medium Duty equivalent)
3.6 kN/m² (Medium Duty)
3.0 kN/m² (Load Class 4)
EN 12811-1:2003
Steel Yield Strength (Common Grade)
240 MPa (Yst 240 grade)
235 MPa (S235 grade)
EN 12811-1 / EN 10025
Top Guardrail Height (from platform)
0.9 m to 1.2 m
1.0 m (nominal)
EN 12811-1:2003
Minimum Toeboard Height
150 mm
150 mm
EN 12811-1:2003
Wall Thickness (Medium Duty Standard)
3.2 mm (prescribed)
Typically 3.2 mm, but is performance-based, not strictly prescribed.
EN 12810-1:2003
⚠ Verify details from original standards before use
Key Values5
Quick Reference Values
Standard outer diameter of tubes48.3 mm
Minimum nominal wall thickness of tubes3.2 mm
Minimum yield stress for steel tubes (YSt 210)210 MPa
Maximum deviation in straightness of tubes1/600 of the length
Minimum slip load for a right-angle coupler6.0 kN
Tables & Referenced Sections
Key Tables
Table 1 - Permissible Deviation on Dimensions of Tubes
Table 2 - Performance Requirements for Right Angle Coupler
Table 3 - Performance Requirements for Swivel Coupler