CivilTech Studio blog
IS 456:2000 is the Indian code of practice for plain and reinforced concrete. These guides work through its limit state design rules — flexure, shear, development length, slabs and footings — with worked examples.
#mat-foundation#raft-foundation#drop-panel
Mat foundation design with drop panels for punching shear: step-by-step calculation per IS 456 Clause 31.6 and ACI 318-19 Section 22.6, critical perimeter, drop panel sizing, and a worked example.
7 min read
Starting sizes for RCC beams, slabs, columns and footings from IS 456-based thumb rules, with a worked house-frame example and a ready table. Not a design.
9 min read
#is-456#reinforcement#detailing
How to calculate development length (Ld) and lap length to IS 456:2000 Cl 26.2, with a ready Ld/φ table for Fe 415, Fe 500 and Fe 550 and a worked example for a 16 mm bar.
4 min read
#basement-design#is-456#is-3370
Basement wall design to IS 456 and IS 3370, step by step: at-rest earth and water pressure, propped-wall moments, base slab uplift, the 1.2 flotation check and 0.2 mm crack width, with a full worked example run on the CivilTech Studio engine.
22 min read
#is-10262#concrete-mix-design#m25-concrete
Step-by-step M25 concrete mix design to IS 10262:2019: target strength, w/c ratio, cement and aggregate quantities per m³, with hand calculation.
12 min read
#is-456#concrete-testing#cube-test
Concrete cube test acceptance criteria to IS 456 Cl 16 and Table 11 (as amended): the fck − 3 individual limit, the 4-result group mean, sampling frequency, invalid samples and a worked M25 register with ten pours.
15 min read
#is-456#footing-design#isolated-footing
Isolated footing design IS 456 guide, step by step: plan size from net SBC, depth from one-way shear, punching and dowel anchorage, steel by Annex G. A full worked example for a 900 kN column, hand-checked against the CivilTech Studio engine.
21 min read
#retaining-wall#is-456#cantilever-wall
A complete retaining wall design calculation for a 4.0 m cantilever RC wall to IS 456: earth pressure, overturning, sliding (cl. 20.1/20.2), base pressure, stem, heel and toe steel, with every number checked by hand and by the CivilTech Studio engine.
21 min read
#rcc-beam-design#is-456#limit-state-design
RCC beam design calculation to IS 456 with a fully worked 230 × 450 mm example: Mu,lim, Annex G steel, xu check, τv vs τc stirrups, crack width and span/depth, hand-checked against the CivilTech Studio engine and compared with ACI 318 and EC2.
19 min read
Shear wall design to IS 13920 step by step: boundary-element stress trigger, P–M interaction, in-plane shear with τc,max cap, minimum steel and spacing, plus a fully worked 3000 × 250 mm M30 wall checked by hand and in software.
17 min read
#slab-design#is-456#two-way-slab
Two way slab design to IS 456 step by step: Table 26 moment coefficients with interpolation, Ast from Annex G, minimum steel, bar spacing, span/depth deflection, shear and corner torsion steel, with a fully checked 4 m × 5 m worked example.
17 min read
