IS 14213:1994 is the Indian Standard (BIS) for construction of walls using precast concrete stone masonry blocks. This standard provides guidelines for the construction of walls using precast concrete stone masonry blocks. It covers the requirements for materials, manufacturing process, dimensions, strength of the blocks, as well as the mortar mix and construction practices for laying and curing the walls. The code aims to ensure quality and structural integrity in masonry work utilizing these specific precast units.
Code of practice for construction of walls using precast concrete stone masonry blocks
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Mortar Joint Thickness | Not exceeding 10 mm | Nominal 3/8 in. (9.5 mm) | TMS 602-16 |
| Wall Plumbness Tolerance | ± 6 mm in 3 m height | ± 1/4 in. in 10 ft (approx. ± 6.4 mm in 3.05 m) | TMS 602-16 |
| Minimum Curing Period | Kept moist for at least 7 days | Damp cured for a minimum of 3 days | NZS 4210:2001 |
| General Purpose Mortar Mix (by proportion) | 1 Cement : 6 Sand | 1 Cement : 1 Lime : 6 Sand (for Type N mortar) | ASTM C270 (referenced by TMS 602) |
| Typical Mortar Compressive Strength (28 days) | ~3.0 N/mm² (for M2 grade 1:6 mix) | Minimum 5.2 N/mm² (750 psi) for Type N mortar | ASTM C270 (referenced by TMS 602) |
| Minimum Compressive Strength of Loadbearing Blocks | 3.5 N/mm² (Grade 3.5 as per IS 2185 Pt 1) | 13.8 N/mm² (2000 psi) on net area | ASTM C90 (referenced by TMS 602) |
| Chasing/Cutting of Masonry | Vertical chases not deeper than 1/3 wall thickness; horizontal chases not deeper than 1/6 wall thickness. | Generally discouraged in structural elements; permitted with strict limitations and engineering approval, especially in seismic zones. | General practice in TMS 602 / EN 1996 |