IS 1341:1992 is the Indian Standard (BIS) for steel butt hinges. This Indian Standard lays down the requirements regarding materials, manufacture, dimensions, tolerances, and finish for mild steel butt hinges used extensively in building construction. It classifies hinges into light, medium, and heavy-weight categories to suit different load and application requirements.
Steel butt hinges
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Durability Cycle Test | Not specified. A static load test is required instead. | Grade 1: 2,500,000 cycles; Grade 2: 1,500,000 cycles. | ANSI/BHMA A156.1-2022 |
| Fire Resistance Classification | Not defined in the standard. | Digit 4 of classification is '1' for hinges suitable for fire/smoke resistant doors. | BS EN 1935:2002 |
| Corrosion Resistance Test | Qualitative check of finish quality; no specific test mandated. | Defined by grades (0-4) based on hours in Neutral Salt Spray (NSS) test, e.g., Grade 3 = 96 hours. | BS EN 1935:2002 |
| Primary Classification System | Based on size (mm) and weight category (Light, Medium, Heavy). | Performance-based grading (Grade 1, 2, 3) based on cycle life, material, and finish. | ANSI/BHMA A156.1-2022 |
| Flap Thickness (100mm / 4" Heavy Weight Hinge) | 2.80 mm (Nominal) | 0.134 inches (3.4 mm) for a standard weight 4" hinge. | ANSI/BHMA A156.1-2022 |
| Test Door Mass Capability | Implied by static load test (e.g., 40kg for 100mm heavy hinge), but not an explicit classification parameter. | Explicitly classified by grades (e.g., Grade 7 = 160 kg test door mass). | BS EN 1935:2002 |
| Security Classification | Not defined. | Digit 7 of classification code defines grade of security (e.g., Grade 1 for high security applications). | BS EN 1935:2002 |