Neutron STEM Lab

Civil Engineering Reference Center

Browse detailed civil and structural references for materials, loads, section properties, soils, hydraulics, surveying, structural concepts, units, and equations.

Civil Reference Center: labelled diagrams and key equations for civil engineering reference, materials, loads, and soils.
Browser-local interactive workspace
Interactive workspace initializes in your browser. Engineering method, assumptions, validation, and references are available below.

Engineering reference

Civil Reference Center: theory, method, and sources

This civil & structural engineering workspace publishes 5 governing equations, 4 stated assumptions, 1 documented boundary, and 1 source so the numbers it returns can be checked rather than taken on trust.

Calculations run locallyCalculation & source methodology

How this tool works

Clickable drill-down entries explain purpose, parameters, equations, selection guidance, examples, and limitations.

Calculators and topics covered

  • civil engineering reference
  • materials
  • loads
  • soils
  • hydraulics
  • surveying
  • concrete
  • steel
  • timber
  • dead load
  • live load
  • wind
  • section properties
  • USCS

Core equations

section modulus:S=Ic\text{section modulus:}\quad S = \frac{I}{c}rectangular section:I=bh312  and  A=bh\text{rectangular section:}\quad I = \frac{bh^{3}}{12}\; and\; A = bheffective stress:σ′=σ−u\text{effective stress:}\quad \sigma ^{\prime} = \sigma - uManning uniform flow:V=(1n)R23S12\text{Manning uniform flow:}\quad V = \left(\frac{1}{n}\right) R^{\frac{2}{3}} S^{\frac{1}{2}}rational runoff:Q=CiA\text{rational runoff:}\quad Q = CiA

Method and assumptions

Assumptions

  • Entries summarize widely published relationships and typical property ranges rather than values from any single code edition.
  • Property ranges are representative of common construction materials and are not substitutes for mill certificates or geotechnical test reports.
  • Load and resistance factors are omitted; entries describe nominal relationships, not factored design checks.
  • Unit conversions assume SI base units unless an entry states otherwise.

Limitations and design boundaries

  • Reference values are broad educational ranges and concepts. Always use project specifications, current governing standards, site data, manufacturer information, and qualified professional review.

Sources and references

Primary sources are preferred for ratings, standards, manufacturer data, and externally defined constants.

Source policy
  • Civil engineering mechanics and materials textbooksStable foundational definitions and formulas.

Related Civil & Structural Engineering tools

Surveying & SiteCalculate coordinate geometry, bearings, traverse closure, leveling, grades, curves, plan areas, earthwork volumes, station interpolation, and cross slopes.Geotechnical & FoundationsFree geotechnical engineering calculators for effective stress, soil relationships, bearing capacity, foundations, earth pressure, settlement, and site analysis.Hydraulics & StormwaterCalculate continuity, hydraulic head, Reynolds number, pipe losses, open-channel flow, pump power, orifice and weir discharge, and Rational Method runoff.Structural AnalysisFree structural analysis calculators for beam reactions, shear force, bending moment, deflection, section properties, truss forces, Euler buckling, and combined stress.