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IS 2212:1991 is the Indian Standard (BIS) for load-bearing brickwork. This code covers the general principles and construction practices for load-bearing and non-load-bearing brickwork in buildings. It provides comprehensive guidelines on material selection, mortar preparation, brick laying techniques, bonding, and curing to ensure masonry stability and durability.
Provides guidelines for good construction practices for load-bearing brickwork.
! Always soak burnt clay bricks in water before laying until air bubbles cease, preventing them from absorbing moisture from the mortar and weakening the bond.
! Ensure vertical joints are properly staggered (typically by half a brick) to avoid continuous vertical planes of weakness.
! Do not construct more than 1.5 meters of brickwork height in a single day to prevent instability and crushing of green mortar at the base.
! Rake the joints to a depth of 10-15 mm while the mortar is still green to provide a proper key for subsequent plastering.
Code of practice for the use of masonry - Part 1: Structural use of unreinforced masonry
Provides design rules for unreinforced load-bearing masonry, serving as a direct historical predecessor for many concepts in IS 2212.
BS EN 1996-1-1:2005CEN (European Union)
MediumCurrent
Eurocode 6: Design of masonry structures - Part 1-1: General rules for reinforced and unreinforced masonry structures
Modern code for unreinforced and reinforced masonry using a limit state design philosophy, covering the same structural systems.
TMS 402-16The Masonry Society (US)
MediumCurrent
Building Code Requirements for Masonry Structures
Covers design of unreinforced and reinforced masonry using both allowable stress design (ASD) and strength design (SD) methods.
AS 3700-2018Standards Australia (Australia)
MediumCurrent
Masonry structures
Comprehensive code for the design of unreinforced, reinforced, and pre-stressed masonry using limit state principles.
Key Differences
≠Design Philosophy: IS 2212 uses a permissible/allowable stress design method, where calculated stresses under service loads must not exceed pre-defined limits. Modern codes like EN 1996-1-1 use a limit state design (LSD) approach with partial safety factors for loads and materials.
≠Material Strength: IS 2212 determines basic compressive strength from tables based on brick crushing strength and mortar type. EN 1996-1-1 uses a formula (fk = K·fb^α·fm^β) that combines the normalized compressive strength of the unit (fb) and the mortar strength (fm).
≠Mortar Specification: IS 2212 specifies mortar primarily by mix proportions (e.g., 1:3 cement:sand for M1 grade), which is a prescriptive approach. EN 1996-1-1 specifies mortar by performance, designating it by its compressive strength (e.g., M4, M12 for 4 N/mm² and 12 N/mm²).
≠Safety Factors: IS 2212 incorporates a global factor of safety implicitly within its permissible stress values. In contrast, EN 1996-1-1 explicitly applies separate partial safety factors to loads (γF) and material strengths (γM), allowing for a more refined risk assessment.
Key Similarities
≈Slenderness Ratio Concept: Both IS 2212 and international codes use the concept of slenderness ratio (effective height / effective thickness) as a primary parameter to assess a wall's susceptibility to buckling and apply corresponding stress reduction factors.
≈Dependence on Component Strength: All codes recognize that the compressive strength of the masonry composite is a function of the strengths of its two primary components: the masonry unit (brick) and the mortar.
≈Effective Height Definition: The method for determining the effective height of a wall based on its end restraint conditions (e.g., lateral and rotational support from floors/roofs) is conceptually similar across IS 2212 and other standards like EN 1996-1-1.
≈Consideration of Eccentricity: All standards acknowledge that loads may be applied eccentrically, leading to combined axial and bending stresses, and provide methods to account for this in design, even if the specific calculation methods differ.
Parameter Comparison
Parameter
IS Value
International
Source
Maximum Slenderness Ratio
27 for walls in buildings with more than two storeys; higher values for single/double storey buildings if cement mortar is used.
27 is the recommended maximum slenderness ratio (λ) for general cases.
BS EN 1996-1-1
Mortar Designation
Prescriptive, by mix proportions (e.g., M1, H1, L1) with indicative strength.
Performance-based, by compressive strength class (e.g., M4, M6, M12, where M'x' = 'x' N/mm² strength).
BS EN 1996-1-1
Effective Height Factor (Wall restrained top & bottom)
0.75 x Height (Clause 4.4.1)
0.75 x Height (for simple lateral restraint)
BS EN 1996-1-1
Stress Reduction Factor for Slenderness (SR=20)
0.70 (from Table 3)
Calculated via a complex formula based on eccentricity and creep; not a simple table lookup.