Indian Standard Codes

The foundational code for all RCC design in India. Covers limit state and working stress methods, material specifications, durability requirements, reinforcement detailing, and design of beams, slabs, columns, footings, stairs, and walls.

Step-by-step procedure for designing concrete mixes from M10 to M80. Covers target mean strength, water-cement ratio, aggregate selection, admixture dosage, and trial mix adjustments. Updated to align with IS 456 amendments.

Five-part code governing all external actions on structures: Part 1 — Dead loads (unit weights), Part 2 — Imposed (live) loads by occupancy, Part 3 — Wind loads (speed maps, pressure coefficients), Part 4 — Snow loads, Part 5 — Special loads and combinations.

Defines seismic zones, zone factors, importance factors, response reduction factors, and response spectra. Provides equivalent static and dynamic analysis procedures for buildings, liquid-retaining structures, bridges, and dams.

Mandatory for structures in Seismic Zones III, IV, and V. Specifies ductile reinforcement ratios, confining hoops, lap splice locations, joint detailing, and capacity design principles for beams, columns, and shear walls.

Governs design of steel members and connections using the Limit State Method. Covers tension members, compression members, beams, plate girders, bolted and welded connections, fatigue, and fire resistance. Replaced the 1984 working stress approach.

Covers shallow foundation design — spread footings, combined footings, raft foundations. Specifies allowable bearing pressures, settlement criteria, depth of foundation, and construction guidelines for different soil types.

Four-part code for deep foundations: Part 1 — Driven cast-in-situ concrete piles, Part 2 — Bored cast-in-situ piles, Part 3 — Under-reamed piles, Part 4 — Load tests. Covers pile capacity, group action, negative skin friction, and settlement.

Four-part code for water tanks and reservoirs: Part 1 — General requirements, Part 2 — Reinforced concrete, Part 3 — Prestressed concrete, Part 4 — Design tables. Emphasises crack-width control, waterproofing, and joint detailing.