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IS 10958:1984 is the Indian Standard (BIS) for a general checklist of functions of joints in building (iso 3447-1975). This standard, adopted from ISO 3447-1975, provides a comprehensive checklist of the primary and secondary functions that joints in buildings are required to perform. It acts as a systematic guide for designers to ensure all performance criteria for joints, such as accommodating movement, providing weather sealing, and fire resistance, are considered during design.
A general checklist of functions of joints in building (ISO 3447-1975)
Overview
Status
Current
Usage level
Specialized
Domain
Architectural — Building Construction Practices incl. Painting, Varnishing
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Use this checklist during the early design stages to create a performance specification for building joints (e.g., expansion, construction, control joints).
! This document is not a design manual but a conceptual tool to ensure no functional requirement of a joint is overlooked before selecting materials and dimensions.
! It is particularly useful for complex projects involving facade engineering or where different building materials with varying properties meet.
ISO 3447:1975ISO (International Organization for Standardization)
HighWithdrawn
Building construction — Joints — General checklist of functions
IS 10958:1984 is a direct adoption of this withdrawn ISO standard, sharing an identical structure and content.
ISO 20140-1:2019ISO (International Organization for Standardization)
MediumCurrent
Building and civil engineering works — Sealants — Part 1: General requirements for joints and sealants
This is the current successor to the original ISO source, evolving from a simple checklist to providing specific requirements for joints and the sealants used in them.
BS 6093:2006+A1:2013BSI (British Standards Institution), UK
HighCurrent
Code of practice for design of joints and jointing in building construction
Provides a comprehensive code of practice that elaborates on the design principles for the functions listed in the IS 10958 checklist.
ASTM C1193-16(2021)ASTM International (USA)
MediumCurrent
Standard Guide for Use of Joint Sealants
Focuses on the practical selection and application of joint sealants, which is a primary method of fulfilling many functions on the IS checklist.
Key Differences
≠IS 10958 is a qualitative checklist of functions to consider, whereas modern standards like ISO 20140-1 provide quantitative performance requirements and test methods (e.g., Movement Accommodation Factor).
≠The Indian standard is document-centric, providing a list for designers. Modern equivalents like ASTM C1193 are material-centric, giving detailed guidance on the selection, properties, and application of specific materials like sealants.
≠IS 10958 is purely a 'checklist', offering no design solutions. In contrast, BS 6093 is a 'code of practice' that provides detailed design guidance, calculations, and typical details for various joint types.
≠The scope of IS 10958 is very general ('joints in building'). The superseding ISO 20140-1 has a more focused scope on 'joints and sealants', reflecting the industry's evolution towards performance-based sealant solutions.
Key Similarities
≈Both the IS code and modern international standards categorize joint functions into core groups: accommodation of movement, resistance to environmental factors (water, air, fire, sound), and ensuring structural stability.
≈The fundamental types of building movement to be accommodated by joints (thermal expansion/contraction, shrinkage, creep, settlement) are identified and considered in both IS 10958 and current standards like BS 6093.
≈All standards promote a holistic design approach, emphasizing that a single joint must often perform multiple, sometimes conflicting, functions simultaneously (e.g., be watertight while allowing for movement).
≈The concept of separating building elements to manage stresses and movements, which is the underlying principle for having joints, is central to both the 1984 Indian standard and all its modern international counterparts.
Parameter Comparison
Parameter
IS Value
International
Source
Document Type
A general checklist of functions.
A code of practice with design rules and recommendations.
BS 6093:2006+A1:2013
Guidance on Movement
Lists movement types (e.g., thermal, shrinkage) as an item to consider.
Provides formulae and requires quantification of movement, using concepts like Movement Accommodation Factor (MAF).
ISO 20140-1:2019
Fire Resistance
Checklist item: 'Resistance to the passage of fire, smoke and hot gases'.
Specifies design principles for fire-stopping in joints and references specific fire testing standards (e.g., BS 476 series).
BS 6093:2006+A1:2013
Watertightness
Checklist item: 'Resistance to the passage of water and water vapour'.
Provides detailed guidance on joint geometry, backing materials, and sealant selection to achieve a watertight seal.
ASTM C1193-16(2021)
Material Selection
No specific guidance provided; the standard is material-agnostic.
Extensive guide for selecting appropriate sealant types (e.g., silicone, polyurethane) based on substrate, exposure, and expected movement.
ASTM C1193-16(2021)
Original Source Alignment
Adopted the checklist structure and content from the original ISO standard.
Identical checklist structure and content.
ISO 3447:1975
Acoustic Performance
Checklist item: 'Resistance to the passage of airborne and structure-borne sound'.
Provides design recommendations for maintaining sound insulation levels across joints, referencing acoustic testing standards.
BS 6093:2006+A1:2013
⚠ Verify details from original standards before use
Key Values0
No quick reference values available for this code yet.
Tables & Referenced Sections
Key Tables
No tables data
Key Clauses
Clause 3 - Checklist of Functions
Clause 3.2 - Main Functions
Clause 3.3 - Other Functions
Frequently Asked Questions3
What is the purpose of this standard?+
Its purpose is to provide a systematic checklist of potential functions (e.g., allow movement, provide fire resistance, offer acoustic insulation) that a building joint may need to fulfill.
Does this code provide design details for joints?+
No, it is a guideline listing the 'what' (functions) not the 'how' (design calculations or material specifications). It helps in defining performance requirements.
What are some main functions of joints listed in the standard?+
Key functions include accommodating dimensional variations, providing continuity of insulation (thermal/acoustic), ensuring weather tightness, and maintaining fire resistance.