Similar International Standards
ASTM D198-19ASTM International, USA
HighCurrent
Standard Test Methods of Static Tests of Lumber in Structural Sizes
Provides methods for bending and compression tests on full-size structural timber, overlapping with IS 6346 test procedures.
EN 408:2010+A1:2012CEN (European Committee for Standardization), Europe
HighCurrent
Timber structures - Structural timber and glued laminated timber - Determination of some physical and mechanical properties
Defines test methods for determining bending strength, stiffness, and compression strength of structural timber, aligning with the IS code's objectives.
AS/NZS 4063.1:2010Standards Australia / Standards New Zealand, Australia/New Zealand
MediumCurrent
Characterisation of structural timber - Part 1: Test methods
Specifies methods for determining characteristic properties of structural timber, including bending and compression tests relevant to the IS code.
ISO 13910:2005ISO (International Organization for Standardization), International
LowWithdrawn
Structural timber — Characteristic values
Focuses on deriving characteristic values from test data rather than the primary test methods themselves, but references similar testing principles.
Key Differences
≠IS 6346:1971 is highly specific to round timber props for mines, whereas modern standards like ASTM D198 and EN 408 are for general structural timber, usually of rectangular cross-section.
≠Modern international standards specify strain-controlled or displacement-controlled loading rates (e.g., mm/min), which are more precise than the load-controlled rate (kgf/min) specified in the older IS code.
≠International standards typically require test results to be adjusted to a reference moisture content (e.g., 12%), a procedure not detailed in IS 6346, which tests props in 'green' or 'air-dry' condition.
≠Test setup parameters, such as the span-to-depth ratio for bending tests, are defined as fixed values in IS 6346 (e.g., 1.2 m span), while in EN 408 and ASTM D198, they are proportional to the specimen's dimensions (e.g., span = 18h).
Key Similarities
≈All standards prescribe fundamental mechanical tests, including an axial compression test to determine maximum compressive strength and a bending (flexural) test for Modulus of Rupture and Modulus of Elasticity.
≈The basic principle of applying a load using a universal testing machine and measuring the load at failure or deflection is common across all the compared standards.
≈All standards require the timber specimens to be free from major strength-reducing defects and for the ends to be prepared properly (e.g., sawn square) to ensure uniform load application in compression tests.
≈The underlying engineering formulas used to calculate key properties like compressive stress (Load/Area) and Modulus of Rupture from the test data are based on the same mechanical principles.