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IS 2193:1986 is the Indian Standard (BIS) for precast prestressed concrete street lighting poles. This standard specifies the requirements for the materials, design, manufacture, and testing of precast prestressed concrete poles used for street lighting. It defines dimensions, working loads, safety factors, and specific transverse strength tests to ensure durability against wind loads and environmental exposure.
Precast Prestressed Concrete Street Lighting Poles
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Lifting and handling of poles must only be done at designated pick-up points to prevent the induction of reverse bending moments and subsequent cracking.
! Planting depth must be rigorously adhered to on-site to ensure the intended foundation fixity and resistance to wind load overturning.
! Adequate concrete strength must be achieved and verified prior to the transfer of prestress to avoid anchorage failure.
EN 40-4:2013CEN (European Committee for Standardization), Europe
HighCurrent
Lighting columns - Part 4: Requirements for reinforced and prestressed concrete lighting columns
Directly equivalent, covering design, manufacturing, and testing of prestressed concrete lighting columns.
ASTM C1089-18ASTM International, USA
HighCurrent
Standard Specification for Spun Cast Prestressed Concrete Poles
Covers prestressed concrete poles, focusing on the spun cast manufacturing method, which is common for lighting poles.
AASHTO LRFDLTS-1AASHTO (American Association of State Highway and Transportation Officials), USA
MediumCurrent
LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals
Broader design specification for all types of luminaire supports, not specific to precast concrete but covers the application.
AS/NZS 4676:2022Standards Australia/Standards New Zealand
MediumCurrent
Structural design requirements for utility services poles
General structural design standard for utility poles, including lighting, not specific to prestressed concrete.
Key Differences
≠IS 2193 uses the Working Stress Method for design, whereas modern standards like EN 40 and AASHTO LRFDLTS-1 use the more advanced Limit State Design (LSD) or Load and Resistance Factor Design (LRFD).
≠IS 2193 specifies a prescriptive minimum concrete cover of 20 mm. EN 40-4, referencing Eurocode 2, requires cover based on environmental exposure classes (e.g., XC, XD), leading to a more durability-focused and often larger cover requirement.
≠Wind load calculations in IS 2193 are based on IS 875 (Part 3), which is less detailed than the complex methodologies for determining characteristic wind loads specified in EN 40-3-3 or AASHTO LRFDLTS-1.
≠IS 2193 specifies a single maximum deflection limit of H/60. In contrast, EN 40-3-1 provides several deflection classes, allowing designers to choose a performance level appropriate for the specific application.
Key Similarities
≈All standards have a core scope that includes the design, materials, manufacturing, and testing of prestressed concrete poles intended for street lighting applications.
≈A mandatory transverse load test (cantilever bending test) is a common requirement across IS 2193, EN 40-4, and ASTM C1089 to verify the structural capacity and cracking behavior of the pole.
≈All standards specify minimum quality and strength requirements for constituent materials, including cement, aggregates, water, and high-tensile prestressing steel, referencing other national standards for detailed material specifications.
≈Marking of the finished product with essential information like manufacturer's identity, date of casting, pole type, and design load is a common requirement for traceability and on-site identification.
Parameter Comparison
Parameter
IS Value
International
Source
Design Philosophy
Working Stress Method (WSM)
Limit State Design (LSD) / Load and Resistance Factor Design (LRFD)
EN 40-4 / AASHTO LRFDLTS-1
Minimum Concrete Strength (28-day cube)
42 N/mm² (M42)
Minimum class C35/45 (equivalent to 45 N/mm² cube strength)
EN 40-4:2013
Minimum Concrete Cover to Prestressing Steel
20 mm
Dependent on exposure class (e.g., 25-35 mm for typical outdoor conditions)
EN 40-4:2013
Transverse Deflection Limit
H/60 (where H is height above ground)
Defined by classes, e.g., Class 3 is a max deflection of 0.10H
EN 40-3-1:2013
Transverse Load Test Criteria (Cracking)
No cracks should appear at 2.5 times the design working load.
First visible crack must not appear below the specified cracking load.
ASTM C1089-18
Final Loss of Prestress (Assumed)
Not less than 15%
Calculated based on specific models for creep, shrinkage, and steel relaxation (typically 15-25%).
EN 1992-1-1 (referenced by EN 40-4)
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
Minimum grade of concreteM 40
Minimum clear cover to prestressing steel20 mm
Factor of safety against ultimate failure2.0
Nominal planting depth1/6th of overall pole length
Tables & Referenced Sections
Key Tables
Table 1 - Standard Dimensions and Classes of Poles
What is the minimum grade of concrete allowed for prestressed poles?+
M 40 is the minimum grade specified to ensure adequate compressive strength and durability.
What is the minimum clear cover required for the prestressing steel?+
A minimum clear cover of 20 mm must be maintained to protect the steel from corrosion.
How is the pole tested for strength?+
Through a transverse strength test where a lateral load is applied to simulate wind pressure, ensuring it withstands both the working load and the ultimate load (Working Load x 2.0).