IS 11466:1995 is the Indian Standard (BIS) for mechanical anchor fasteners for use in concrete - specification. This standard specifies requirements for materials, dimensions, and performance of mechanical anchor fasteners used in concrete. It details test methods, like the pull-out test, to verify their load capacity and displacement characteristics, ensuring safety and reliability of structural and non-structural connections.
Specifies the requirements for mechanical anchor fasteners intended for use in concrete.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Basis for Safe/Design Load | Safe Working Load = Mean ultimate load / Factor of Safety (typically ≥ 3) | Design Resistance = Characteristic Resistance (5% fractile) / Partial Safety Factor for Material | EAD 330232-01-0601 |
| Cracked Concrete Testing | Not required. Testing is performed in uncracked concrete. | Mandatory for qualification for use in cracked concrete. Tests performed in controlled crack widths (e.g., 0.3mm or 0.5mm). | ACI 355.2-19 |
| Concrete Strength for Qualification Tests | One range: 20 to 25 MPa compressive strength. | Two ranges: Low strength (e.g., 20/25 MPa) and high strength (e.g., 50/60 MPa). | EAD 330232-01-0601 |
| Seismic Qualification | Not specified in the standard. | Requires specific cyclic tension, shear, and crack cycling tests for seismic categories (C1, C2). | EAD 330499-01-0601 (companion to EAD 330232) |
| Number of Tension Tests (Reference) | Minimum of 5 tests for each anchor size. | Minimum of 5 tests per size, per concrete strength, per condition (cracked/uncracked), leading to a far greater number of total tests. | ACI 355.2-19 |
| Corrosion Protection (Zinc Coating) | Minimum 5 microns electroplated zinc coating as per IS 1573. | Varies by corrosion class; typically ≥ 5-8 microns for indoor use, with verification via salt spray testing (e.g., 48 hours). | EAD 330232-01-0601 |
| Displacement under Load | Displacement at safe working load shall not exceed specified limits (e.g., 1.0 mm for M12 expansion anchor). | Displacement is measured and reported but not typically used as a pass/fail criterion for strength; it is published for designer information. | EAD 330232-01-0601 |