IS 4020:1998 is the Indian Standard (BIS) for methods of test for wooden flush door shutters. This standard prescribes the methods of test for evaluating the physical, mechanical, and durability properties of wooden flush door shutters. It is divided into 16 parts covering dimensional accuracy, structural integrity under impact/slamming, and resistance to environmental factors like moisture and glue failure.
Lays down methods for testing the strength, stability and durability of wooden flush door shutters.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Impact Test Impactor | 3 kg sandbag | 30 kg tyre-and-shot filled bag (soft and heavy body impactor) | BS EN 949:2019 |
| Impact Test Drop Height | 750 mm | Varies by duty class, e.g., 200 mm (Class 1) to 900 mm (Class 4) | BS EN 949:2019 |
| Edge Loading Test (Vertical Load) | 600 N (60 kgf) load applied for 10 minutes. Residual deformation ≤ 0.5 mm. | Load varies by class (e.g., 400 N to 1000 N). Residual displacement measured to determine class. | BS EN 947:1999 |
| Buckling Test (Static Torsion) | Apply 300 N load to corner. Residual deformation not to exceed 1 mm. | Apply force to cause a specified twist (e.g., 2 mm) and measure the force required, or apply a set force and measure the twist. Results determine performance class. | BS EN 948:1999 |
| Slamming Test Cycles | 100 cycles (general); 250 cycles (heavy duty) | 50 cycles for abuse testing | WDMA T.M. 7-14 |
| Local Planeness Tolerance | Max depression of 0.5 mm under a 200 mm straight edge. | Varies by class; e.g., max deviation of 0.3 mm for Class 3 over 200 mm length. | BS EN 952:1995 |