IS 10703:1983 is the Indian Standard (BIS) for joints in precast concrete construction. This code provides guidance on the principles for the design and construction of joints in precast concrete structures. It covers the classification of joints based on their function and structural action, details critical design considerations, and gives recommendations on materials and workmanship for connecting precast elements.
Deals with the classification, design considerations, and detailing of various types of joints used in precast concrete construction.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Minimum Bearing Length (Beam/Slab) | 75 mm (Clause 5.2.2.1) | Nominal length of l/180 but not less than 50 mm; 75 mm is common practice. | PCI Design Handbook |
| Bearing Stress on Plain Concrete | 0.25 * fck (Refers to IS 456:1978) | 0.85 * f'c (can be increased if confined, e.g., φ(0.85f'c * A1)√(A2/A1) ≤ 2.0φ(0.85f'c * A1)) | ACI 318-19 |
| Shear Friction Coefficient (μ) for concrete cast against hardened, intentionally roughened concrete | 1.0 (Refers to IS 456, similar principle) | 1.0λ (where λ is a factor for concrete density) | ACI 318-19 (Table 22.9.4.2) |
| Nominal Concrete Cover (Internal, moderate exposure) | ~30 mm (As per IS 456:1978 for moderate exposure) | c_nom = c_min + Δc_dev; where c_min could be 15-20 mm for the same condition (XC1 exposure). | EN 1992-1-1:2004 |
| Grout Strength Requirement | Strength should not be less than that of the precast unit concrete. (Clause 5.2.1.2) | Typically specified to be equal to or greater than the element concrete strength, often 1.25 times for certain applications. | PCI Design Handbook |
| Erection Tolerance (Variation in element length per 3m) | ±5 mm (Clause 4.3.1) | ±6 mm (1/4 in.) per 10 ft (approx. 3m) | PCI MNL 116 (Referenced by ACI/PCI) |