bypraba Civil Encyclopedia — IS Codes, Calculators and Formulas for Indian Engineers
Every formula.
Every IS Code.
Every calculator.
A complete reference built by a practising civil engineer — covering RCC design, concrete mix, IS codes, structural elements, and the full engineering vocabulary. No subscriptions. No paywalls.
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Six knowledge domains — each a complete reference in itself.
Calculators
Live engineering calculators for RCC design, concrete mix, footings, slabs, columns, bar bending, and more — all as per IS codes.
15 calculators →📘IS Codes
Clause-level summaries of Indian Standard codes — IS 456, IS 875, IS 1893, IS 800, IS 10262, and 25+ more — with key tables and provisions.
30+ IS codes →📐Formulas
Structural, geotechnical, hydraulics, surveying, and construction formulas — each with variable definitions and worked examples.
200+ formulas →📖Glossary
Plain-English definitions of every technical term a civil engineer encounters — from admixtures to zero slump, A to Z.
350+ terms →🔤Abbreviations
Every abbreviation used on civil engineering drawings, reports, and codes — BBS, CBR, FGL, RCC, SBC, and 150+ more decoded.
160+ abbreviations →🏗️Structural Elements
Deep-dives into beams, columns, slabs, footings, walls, staircases — theory, design steps, detailing rules, and IS code clauses all in one place.
7 elements →Essential equations
All Formulas →Bending Stress
σ = M·y / I
Stress at any fibre due to bending moment in a beam cross-section.
Moment of Resistance
Mu,lim = 0.138·fck·b·d²
Limiting ultimate moment of resistance for singly-reinforced sections per IS 456.
Area of Steel Required
Ast = Mu / (0.87·fy·d·(1 - fy·Ast / fck·b·d))
Iterative formula for tensile reinforcement area in RCC beams.
Water-Cement Ratio
w/c = 0.5 / (f'c / fck + 1.5)
Approximate w/c ratio for target mean strength in concrete mix design.
Shear Stress
τv = Vu / (b·d)
Nominal shear stress at a section in RCC members per IS 456.
Built by a Civil Engineer,
for Civil Engineers.
Finding reliable, practical, and code-compliant information on site or in the design office is often frustrating. Developed by Prabakaran and drawing from active experience as a Project Engineer managing large-scale international infrastructure, this encyclopedia bridges the gap between academic theory and practical site execution.
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