REFERENCE · IS CODE LIBRARY

IS Codes Used

27 IS codes across 6 tools · Sourced from Bureau of Indian Standards publications

Every material quantity, mix ratio, cover depth, steel percentage, and structural parameter in NirmanShastra traces back to a specific clause in one of these codes. IS code values are locked at source — they cannot be altered by user input, and they are updated only when BIS revises the relevant publication.

StructurePro

RCC Structure Cost Estimator

Code No.	Full Title	What it Governs in NirmanShastra
IS 456:2000	Plain and Reinforced Concrete — Code of Practice	Concrete mix ratios, minimum grades by exposure class, cover requirements, dry volume factors, and all RCC member design minimums used in structural estimation.
IS 1786:2008	High Strength Deformed Steel Bars and Wires for Concrete Reinforcement — Specification	Steel grades (Fe415, Fe500, Fe500D, Fe550D), yield strength, elongation requirements, and density used for reinforcement quantity calculations.
IS 1893:2016	Criteria for Earthquake Resistant Design of Structures (Part 1: General Provisions and Buildings)	Seismic zone classification (II–V) and Z factors applied to determine minimum steel grade, tie/stirrup spacing, and foundation type recommendations.
IS 13920:2016	Ductile Design and Detailing of Reinforced Concrete Structures subjected to Seismic Forces — Code of Practice	Seismic detailing requirements: maximum column tie spacing at hinge zones, beam stirrup spacing near supports, and ductility requirements for Zone III–V.
IS 1904:2016	Design and Construction of Foundations in Soils — General Requirements	Minimum foundation depth (500mm), bearing capacity by soil type, and foundation type selection logic (isolated, strip, raft, pile) based on site conditions.
IS 2911:2010	Design and Construction of Pile Foundations	Pile foundation parameters used in StructurePro for marshy and black cotton soil conditions.
IS 875:2015	Code of Practice for Design Loads (Other than Earthquake) for Buildings and Structures	Live load values: 2 kN/m² for residential floors, 1.5 kN/m² for roofs, 3 kN/m² for stairs — used in structural estimation.
IS 269:2015	Ordinary Portland Cement — Specification	OPC 53 grade cement specification referenced in material schedules.
IS 383:2016	Coarse and Fine Aggregate for Concrete — Specification	Aggregate grading and quality requirements referenced in material schedules and BOQ notes.

MasonryPro

Masonry Cost Estimator

Code No.	Full Title	What it Governs in NirmanShastra
IS 1077:1992	Common Burnt Clay Building Bricks — Specification	Modular brick dimensions (190×90×90mm) and properties used for brick quantity calculation in 9" and 4.5" walls.
IS 12894:2002	Pulverised Fuel Ash — Lime Bricks — Specification	Fly ash brick (modular and non-modular) dimensions and properties used in wall type comparisons.
IS 2185:2005	Concrete Masonry Units — Specification	Hollow and solid concrete block (200mm, 100mm) dimensions and strength requirements used in block masonry calculations.
IS 2212:1991	Code of Practice for Brickwork	Bonding patterns (English bond for 9" walls, stretcher bond for 4.5"), mortar joint thickness (10mm), minimum brick soaking time (2 hours), and 7-day curing requirement.
IS 1661:1972	Code of Practice for Application of Cement and Cement Lime Plaster Finishes	Plaster thickness standards: 12mm internal, 15mm external, 6mm ceiling — and cement/sand ratios per coat used in plaster BOQ.
IS 2645:2003	Integral Waterproofing Compounds for Cement Mortar and Concrete — Specification	Waterproofing method specifications referenced in terrace and bathroom waterproofing BOQ sections.
IS 4326:1993	Earthquake Resistant Design and Construction of Buildings — Code of Practice	Seismic band requirements (plinth, sill, lintel, roof bands — 75mm thick, 2×8mm bars) mandatory in Zone III–V; AAC block restriction as load-bearing masonry in Zone IV–V.
IS 2250:1981	Code of Practice for Preparation and Use of Masonry Mortars	Mortar grades (M1 to M5), mix ratios (1:3 to 1:8), and minimum mortar grade for load-bearing masonry.
IS 2547:1976	Gypsum Plaster Products — Specification	Gypsum plaster specification and no-water-curing property referenced in interior plaster options.

ElectricalPro

Electrical Cost Estimator

Code No.	Full Title	What it Governs in NirmanShastra
IS 732:2019	Electrical Installations of Buildings — Code of Practice	Minimum wire sizes by circuit type (1.5 sqmm lighting, 2.5 sqmm power, 4.0 sqmm AC/geyser, 6.0 sqmm sub-panel, 10.0 sqmm incomer), circuit load maximums (800W lighting, 3,000W power), and wiring wastage factor (1.15).
IS 694:2010	PVC Insulated Cables for Working Voltages up to and including 1100V — Specification	PVC insulated cable properties referenced in wire schedule and material BOQ.
IS 8828:2007	Electrical Accessories — Circuit Breakers for Overcurrent Protection for Household and Similar Uses — Specification	MCB ratings and specifications referenced in DB panel schedule and material selection.
IS 3043:2018	Code of Practice for Earthing	Maximum earthing resistance (1 ohm), RCCB 30mA requirement for bathrooms, and earthing pit specifications referenced in electrical BOQ.

PlumbingPro

Plumbing Cost Estimator

Code No.	Full Title	What it Governs in NirmanShastra
IS 1172:1993	Code of Basic Requirements for Water Supply, Drainage and Sanitation	Water demand rates (135 LPCD municipal, 150 LPCD borewell), tank sizing formula (daily demand × 0.67), and minimum fixture requirements — the basis of PlumbingPro's free water demand calculator.
IS 1742:1983	Code of Practice for Building Drainage	Minimum pipe slopes (1:48 for 75mm waste, 1:80 for 110mm soil stack), pipe diameter requirements (75mm waste, 110mm WC soil stack), and drainage layout principles.

InteriorPro

Interior Cost Estimator

Code No.	Full Title	What it Governs in NirmanShastra
IS 2547:1976	Gypsum Plaster Products — Specification	Gypsum board and plaster specifications referenced in false ceiling and gypsum finish options.

VastuPro

Vastu Compliance Analyser (Free)

Code No.	Full Title	What it Governs in NirmanShastra
IS 4326:1993	Earthquake Resistant Design and Construction of Buildings — Code of Practice	Seismic zone warnings shown when a structural wall is proposed in a direction that conflicts with seismic band requirements; referenced in structural remedies for load-bearing configurations.

All Tools

National Building Code — cross-tool

Code No.	Full Title	What it Governs in NirmanShastra
NBC 2016	National Building Code of India 2016	Minimum room dimensions (living/bedroom 9.5 sqm, kitchen 4.5 sqm, bathroom 1.2 sqm), minimum floor height (2.75m), staircase width (900mm), riser/tread requirements (max 190mm riser, min 250mm tread) — referenced across all tools.

NOTE ON CODE CURRENCY

IS codes are published and periodically revised by the Bureau of Indian Standards (BIS). NirmanShastra uses values from the editions listed above. If BIS revises a code referenced here, we update our platform values. We recommend verifying critical parameters against the current BIS publication before committing to specifications for your project.