IS 1949:2009 is the Indian Standard (BIS) for metallic tower bolts. This standard specifies the requirements for materials, dimensions, manufacture, workmanship, and finish of metallic tower bolts used as builder's hardware in doors, windows, and shutters.
Specifies materials, dimensions, finishes and testing of metallic tower bolts for doors and windows.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Static Load Strength Requirement | 250 N load for 1 min without permanent set (for steel bolts >200mm) | Grade 1: Must withstand a 2,225 N (500 lbf) static load. | ANSI/BHMA A156.16 |
| Endurance (Cycle) Testing | Not specified; only a manual operational check is required. | Grade 1: 100,000 cycles of operation. | ANSI/BHMA A156.16 |
| Corrosion Resistance (Example) | Zinc plating to have min. avg. thickness of 5 microns (Fe/Zn 5). | Grade 3: Must withstand 48 hours of Neutral Salt Spray (NSS) test per EN 1670. | BS EN 12051:2000 |
| Design Philosophy | Prescriptive: Plate thickness for a 150mm steel bolt must be 1.60 mm. | Performance-based: No thickness specified; part must pass strength and cycle tests. | ANSI/BHMA A156.16 |
| Shoot Bolt Diameter (150mm Bolt) | 9.5 mm (for steel bolt) | Not prescriptively defined; determined by design to meet performance tests. | BS EN 12051:2000 |
| Classification System | Categorized by size (length), material, and staple type (Type 1 or 2). | 8-digit classification code defining category of use, durability, mass, corrosion resistance, security, etc. | BS EN 12051:2000 |