IS 13957:1994 is the Indian Standard (BIS) for metal-faced plywood -specification. This standard specifies the requirements for metal-faced plywood, a composite material made by bonding metal sheets to a plywood core. It details the materials (plywood, metal, adhesive), manufacturing process, dimensions, tolerances, finish, and testing methods to ensure performance in applications like partitions, furniture, and vehicle bodies.
Metal-faced plywood -Specification
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Plywood Core Adhesive | Boiling Water Proof (BWP) grade synthetic resin conforming to IS 848. | Bonding Class 3 (exterior conditions) as per EN 314-2. | EN 13986:2004+A1:2015 |
| Thickness Tolerance (for panel >8 mm) | ±0.4 mm | Depends on thickness (t). e.g., for a 12mm panel, tolerance is ±(0.2 + 0.03*12) = ±0.56 mm. | EN 13986:2004+A1:2015 (ref. EN 315) |
| Bending Strength (MOR) | Fixed minimum values based on construction, e.g., ~45 N/mm² for 4mm panel. | Not a fixed value; it is a characteristic value declared by the manufacturer and verified via testing to EN 310. | EN 13986:2004+A1:2015 |
| Adhesion Test (Metal Face) | No delamination after 8h boil + 16h dry + 8h boil cycle, plus pull-off test. | No specific adhesion test for the overlay is mandated; performance is assessed through overall durability and declared properties. Core bond tested to EN 314-1. | EN 13986:2004+A1:2015 |
| Minimum Aluminium Face Thickness | 0.15 mm | Not specified; it is part of the manufacturer's declared specification for the overall product. | EN 13986:2004+A1:2015 |