Engineering Constants & Reference Tables
Comprehensive reference for engineering constants: mathematical constants, material properties (steel, concrete, timber, soil), rebar sizes, beam formulas, and section properties.
Engineering Formulas
Reference Lookup
Worked Example
Look Up Rebar Data for 16 mm Bar
Engineering Notes
Assumptions
Common Mistakes
Frequently Asked Questions
What is included in the engineering constants reference?
Mathematical constants, physical constants, steel properties, concrete properties, timber properties, soil properties, rebar sizes, prestressing strand data, beam formulas, and section property formulas.
Where do the values come from?
Values are sourced from IS 456, IS 800, IS 883, ACI 318, EN 1992, EN 1993, ASTM A36/A992, and standard engineering references such as Tomlinson, Bowles, and the Civil Engineering Reference Manual.
How is concrete modulus of elasticity calculated?
Ec = 5000√fck per IS 456 and ACI 318, where fck is the characteristic compressive strength in MPa. For M25 concrete: Ec = 5000√25 = 25,000 MPa.
What rebar sizes are included?
Both IS standard sizes (8 mm to 40 mm) and ASTM standard sizes (#3 through #10) with diameter, area, and unit weight.
What beam formulas are covered?
Simply supported, cantilever, and fixed-end beams with uniform and point loads — max moment, shear, and deflection formulas.
Are soil properties included?
Yes — typical densities, friction angles, and cohesion ranges for sand, clay, gravel, and silt.
What section property formulas are available?
Area (A), moment of inertia (I), and section modulus (Z) for rectangular and circular sections.
Can I search across all categories?
Yes. Use the search field to filter by name, symbol, or category across all entries.