Similar International Standards
EN 314-2:2013CEN - European Committee for Standardization (Europe-wide)
HighCurrent
Plywood — Bonding quality — Part 2: Requirements
Specifies requirements for bonding quality classes of plywood based on end-use conditions (dry, humid, exterior).
ISO 12466-2:2007ISO - International Organization for Standardization
HighCurrent
Plywood — Bonding quality — Part 2: Requirements
Provides requirements for plywood bonding quality based on water resistance, harmonized with EN 314-2.
JAS 233:2019 (Plywood)MAFF - Ministry of Agriculture, Forestry and Fisheries (Japan)
MediumCurrent
Japanese Agricultural Standard for Plywood
A comprehensive product standard for plywood that includes adhesive bond performance requirements (Type I, Type II).
PS 1-19U.S. Department of Commerce / APA - The Engineered Wood Association (USA)
MediumCurrent
Structural Plywood
Defines structural plywood requirements, including bond performance classifications like 'Exterior' and 'Exposure 1'.
Key Differences
≠IS 848 is primarily a specification for the adhesive resin itself, defining properties like solid content, gel time, and pH. Most international standards (like EN 314-2) are performance specifications for the bond in the finished plywood, not the liquid adhesive.
≠The classification systems use different terminologies. IS 848 uses BWP (Boiling Water Proof), WWR (Warm Water Resistant), and CWR (Cold Water Resistant), whereas EN/ISO standards use Class 3 (Exterior), Class 2 (Humid), and Class 1 (Dry).
≠While both use boiling water tests for the highest grade, the test cycles differ. IS 848 specifies a continuous 72-hour boil for BWP grade, while EN 314-2 (Class 3) can use a shorter boil-dry-boil cycle (Treatment 5.1.3) to test bond integrity.
≠IS 848 specifies failing load requirements in Newtons (N) which is dependent on a fixed specimen area, while EN and ISO standards specify shear strength in N/mm² (MPa), which is a measure of stress.
Key Similarities
≈All standards have a hierarchical classification system to categorize the adhesive bond's durability based on its resistance to moisture and weather, from interior (dry) to full exterior exposure.
≈The fundamental test method to assess bond quality is a destructive shear test performed on specially prepared plywood specimens.
≈All standards utilize accelerated ageing procedures involving water immersion, boiling, or temperature cycling to simulate real-world service conditions and test the long-term durability of the glue line.
≈The geometry of the shear test specimen is virtually identical, with a standard test area of 25 mm x 25 mm (625 mm²) being common across IS 848, EN 314-1, and ISO 12466-1.