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Civil engineering guides & free IS‑code calculators
432 practical guides, IS-code explainers and worked examples, plus free calculators for lap length, BBS, mix design and beam analysis. Written for Indian civil-engineering students and site engineers.
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IS 456code-referenced
Lap splice · live 3D modelIS 456 Cl. 26.2
- Ld
- 780 mm
- Tension lap
- 780 mm
- Comp. lap
- 625 mm
Ld = 0.87 × 500 × 16 / (4 × 2.24) = 777 mm
Tension lap = greater of Ld and 30φFull calculator →
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PopularBBS GeneratorCut lengths, weights and a printable bar bending schedule.IS 2502Lap & Development LengthLd, tension and compression lap length with the working.IS 456 Cl. 26.2Cube Test RegisterLog 7 and 28 day cube results and check acceptance.IS 456 Table 11IS 456 Quick TablesCover, bond stress, minimum steel and spacing at a glance.IS 456:2000Concrete Mix DesignMix proportions for a target grade with moisture corrections.IS 10262:2019Beam AnalysisShear force, bending moment and deflection diagrams.StaticsRetaining Wall DesignOverturning, sliding and bearing checks for cantilever walls.Rankine · IS 456NewSteel Weight CalculatorWeight of TMT bars by diameter and length.D² / 162 kg/m
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Column starter barslapped above the raft, IS 456 Cl. 26.2
Checking the drawingsbar size, spacing and cover
Raft foundation meshtop and bottom layers
Binding wiretying the column linksFrom the site
Written for the people who build this.
A raft foundation being checked before the pour. Our guides explain each step the way it happens on site: lap length, bar bending schedules and concrete testing.
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BundleBest valueCivil Site Engineer BundleConcrete QC Handbook and the RCC Lap Length Excel toolkit in one download.
BOQNewBuilding Estimate & BOQ Excel KitEnter building dimensions, get quantities, a priced BOQ and cost per sq ft.
IS 456Best-sellerConcrete Quality Control Handbook238-page field guide: tests, acceptance criteria and QC checklists.Secure payment by UPI, card or net-banking · instant download · 7-day money-back on downloads
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01
Code-referenced
Formulas and values are tied to the Indian Standard they come from: IS 456, IS 10262, IS 2502, IS 13920 and IS 516.
02
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