IS 1019:1974 is the Indian Standard (BIS) for rim latches. This Indian Standard specifies the requirements for materials, dimensions, manufacture, and finish of rim latches used on doors. It is primarily used by hardware manufacturers, architects, and quality inspectors to ensure proper fit, function, and durability of builder hardware.
Specification For Rim Latches
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Endurance Test (Cycles) | 50,000 (mild steel) or 25,000 (brass/aluminium) | Graded: 50,000 (Grade F), 100,000 (Grade G), 200,000 (Grade H) | BS EN 12209:2016 |
| Corrosion Resistance Test | Prescribes finish type; no performance test duration specified. | Performance-based: Graded from 24h to 240h in Neutral Salt Spray (NSS) test. | BS EN 12209:2016 |
| Suitability for Fire Doors | Not specified | Specified classification: Grade 0 (Not suitable) or Grade 1 (Suitable, subject to assessment) | BS EN 12209:2016 |
| Standard Sizes (Case Width) | Prescribed sizes: 65, 75, 90, 100 mm | Not prescribed; dimensions are declared by the manufacturer as part of the product information. | BS EN 12209:2016 |
| Strength of Follower (Torque) | Must withstand 30 kgf·cm (approx. 2.9 Nm) | Varies by durability grade; e.g., Grade G requires withstanding 2.5 Nm abusive torque. | BS EN 12209:2016 |
| Security Grading | Not specified | 7 grades of 'Security against attack' with specific test methods. | BS EN 12209:2016 |