IS 6315:1992 is the Indian Standard (BIS) for floor springs (hydraulically regulated) for heavy doors. This standard specifies requirements for the materials, dimensions, manufacture, workmanship, and performance of hydraulically regulated floor springs used for heavy doors. It classifies springs into three sizes based on door mass and outlines rigorous testing procedures, including endurance, closing efficiency, and leakage tests.
Floor springs (hydraulically regulated) for heavy doors
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 | 100,000 cycles | 500,000 cycles (mandatory grade) | EN 1154 |
| Highest Endurance Grade | 100,000 cycles | 2,000,000 cycles (Grade 1) | ANSI/BHMA A156.4 |
| Classification Method | By door mass (e.g., up to 80 kg, 80-120 kg) | By power size (EN1 to EN7) linked to door width and closing moment | EN 1154 |
| Minimum Mechanical Efficiency | 60% (single-action), 55% (double-action) | 65% (for power sizes ≥ EN3) | EN 1154 |
| Temperature Stability Test | Not specified | Required; closing time variation measured between -15°C and +40°C | EN 1154 |
| Corrosion Resistance Test | General material/finish requirements | Graded based on Neutral Salt Spray test hours (e.g., 240h for Grade 3) | EN 1154 |
| Fire Door Suitability | Not covered | Specific classification digit (0 or 1) indicating suitability | EN 1154 |