Interactive technical references

Engineering Charts and Tables

Search 37 free interactive engineering charts and tables for electrical, structural, geotechnical, piping, HVAC, instrumentation, manufacturing, machining, and fastener applications.

Find a reference by chart name, material, dimension, property, unit, standard term, or real-world use case.

37 References

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Featured Engineering Charts and Tables

Quick access to useful electrical, piping, structural, HVAC, machining, and fastener references.

Electrical Wire Ampacity Chart Compare copper and aluminum conductor ampacity by wire size, insulation temperature, and installation scope. Open reference Piping & Fluid Systems Pipe Size Chart Look up nominal pipe size, outside diameter, wall thickness, and inside diameter across common schedules. Open reference Fasteners & Machining Tap Drill Chart Find inch, metric, and pipe-thread tap drill sizes with practical thread-percentage guidance. Open reference Structural & Materials Floor Joist Span Chart Compare allowable wood-joist spans by species, grade, size, spacing, and design loading. Open reference HVAC & Manufacturing Refrigerant Pressure Temperature Chart Compare saturation pressure and temperature relationships for commonly used refrigerants. Open reference Electrical NEMA Plug Chart Identify NEMA plug and receptacle configurations, voltage ratings, amperage, and wiring-device families. Open reference Fasteners & Machining Bolt Torque Chart Review torque guidance by bolt diameter, grade, material, and lubrication condition. Open reference HVAC & Manufacturing Sheet Metal Gauge Chart Convert gauge numbers to thickness for steel, galvanized steel, stainless steel, and aluminum. Open reference

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Browse All Engineering Charts and Tables

Open a category below or scan the complete reference lists. Each link goes directly to the interactive chart, table, lookup, or comparison page.

Electrical

Electrical Engineering Charts and Tables

Conductor ampacity, wire dimensions and color identification, conduit fill, voltage drop, fuse ratings, grounding conductors, NEMA wiring devices, enclosure protection, and radio-frequency references.

10 references

Structural & materials

Structural and Material Reference Charts

Structural steel sections and grades, reinforcing bar, floor framing spans, sieve openings, soil classifications, stainless-steel gauge thicknesses, hardness conversions, member dimensions, weights, areas, and section properties.

9 references

Piping & fluids

Piping and Fluid-System Charts and Tables

Nominal pipe dimensions, schedules, copper and PEX tube sizes, JIC fitting dimensions, natural-gas and propane demand, compressed-air flow, wall thickness, inside diameter, pressure, length, and pressure-drop references.

8 references

Fasteners & machining

Fastener, Thread, and Machining Charts

Bolt torque, metric thread pitch, tap-drill selection, drill-bit diameters, hole sizing, grades, materials, preload, and machining reference data.

4 references

HVAC & manufacturing

HVAC and Manufacturing Reference Charts

Thermocouple voltage-temperature relationships, refrigerant pressure-temperature data, sheet-metal gauge thicknesses, V-belt profiles and dimensions, surface roughness values, machining symbols, materials, and fabrication references.

6 references

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Interactive tools Engineering Calculators Solve electrical, structural, mechanical, HVAC, fluid, construction, and engineering-economy problems. Formulas Engineering Equations Review equations, variables, units, assumptions, and worked explanations. Discipline hub Civil Engineering Explore structural, geotechnical, transportation, and water-resources topics. Discipline hub Mechanical Engineering Explore HVAC, fluids, thermodynamics, materials, and mechanical design. Discipline hub Electrical Engineering Explore power systems, electronics, controls, and communications.

Use reference data responsibly

How to Use Engineering Charts and Tables

Use the hub to locate the correct reference, then confirm its unit system, source basis, scope, assumptions, and limitations before applying a value.

Confirm the exact case.Match the material, size, grade, unit system, temperature, pressure, installation condition, and application to the reference.
Read the source scope.Check the cited standard, edition, dataset, conversion method, assumptions, tolerances, and exclusions on the individual page.
Verify final decisions.Cross-check against current codes, project specifications, manufacturer data, calibrated software, or qualified engineering review.

Engineering-use limitation

These references support learning, comparison, estimating, preliminary design, and independent checks. They do not replace applicable codes, standards, project requirements, manufacturer instructions, or professional engineering judgment.

Questions

Engineering Charts and Tables FAQ

Quick answers about the reference library and how to use it.

What are engineering charts and tables?

Engineering charts and tables organize dimensions, ratings, capacities, material properties, conversions, classifications, and technical relationships so users can compare or look up values efficiently.

What types of references are included?

The library currently includes electrical conductor, wire-color, and device references; pipe, tubing, fitting, and fuel-gas sizing; structural steel, steel-grade, rebar, soil-classification, and hardness data; floor-joist spans; sieve sizes; thermocouple voltage-temperature and refrigerant pressure-temperature data; gauge thicknesses; V-belt dimensions; surface finish values; and bolt torque, thread, tap-drill, and drill-bit charts.

Can I search by size, property, material, or standard?

Yes. The reference finder searches titles and related terms including dimensions, properties, materials, units, common standard terms, and practical applications. Category filters can narrow the directory.

Do the pages support U.S. customary and SI units?

Unit support depends on the reference. Individual pages provide U.S. customary and SI values where those conversions are valid and useful, while preserving the meaning and source scope of the underlying data.

How do I know which source or edition a table uses?

Standards-dependent pages should identify their source basis, applicable edition or dataset version, assumptions, and limitations. Confirm that information against the requirements governing your project.

Can these references replace final engineering design?

No. Verify values against current codes, standards, project specifications, manufacturer information, appropriate software, and qualified professional judgment before using them for final design, procurement, installation, or field work.

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