Interactive technical references

Engineering Charts and Tables

Search 98 free interactive engineering charts and tables for electrical, structural, geotechnical, piping, mechanical, HVAC, construction equipment, instrumentation, manufacturing, machining, and fastener applications.

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

98 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 Mechanical, 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 Mechanical, 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, wire-nut sizing, conduit fill and bending, voltage drop, fuse ratings, circuit-breaker compatibility, grounding conductors, NEMA wiring devices, starter sizes, enclosure ratings, ingress protection, automotive battery group sizes, radio-frequency bands, and RF connector references.

17 references

Structural & materials

Structural and Material Reference Charts

Structural steel sections and grades, C-channels, reinforcing bar, concrete curing times, floor, deck, and I-joist framing spans, LVL beam spans, metal-stud gauges, roof pitch and slope conversions, plywood thicknesses, square tubing, sieve openings, gravel and aggregate sizes, USCS and AASHTO soil classifications, stainless-steel gauge thicknesses, hardness conversions, Janka wood-hardness ratings, galvanic-corrosion relationships, member dimensions, weights, areas, and section properties.

22 references

Piping & fluids

Piping and Fluid-System Charts and Tables

Nominal pipe dimensions, schedules, PVC, copper, PEX, and HDPE sizes, NPT and BSP thread dimensions, AN and JIC fitting dimensions, hydraulic-hose dimensions, natural-gas and propane demand, compressed-air flow, wall thickness, inside diameter, pressure, length, and pressure-drop references.

14 references

Fasteners & machining

Fastener, Thread, and Machining Charts

Bolt torque and grade identification, bolt-head, nut, washer, screw, nail, and hose-clamp dimensions, Torx and Allen/hex drive sizes, UNC and metric threads, rivet sizing, fraction-to-decimal conversion, feeds and speeds, tap-drill selection, drill-bit diameters, hole sizing, materials, preload, and machining reference data.

17 references

Mechanical, HVAC & manufacturing

Mechanical, HVAC, and Manufacturing Reference Charts

Bearings, oil seals, lubricant compatibility and viscosity, decibel and sound-level references, insulation R-values, MERV air-filter ratings, propane tank sizes, electric-motor frame sizes, excavator size classes, welding electrodes and symbols, cutting-torch tip sizes, RTD resistance-temperature relationships, thermocouple voltage-temperature data, refrigerant pressure-temperature data, superheat and subcooling references, HVAC duct sizing, sheet-metal gauges, press-brake tonnage, V-belt profiles, roller-chain dimensions, sandpaper grit sizes, steam-property tables, surface roughness, and fabrication references.

28 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, NEMA device, starter, enclosure, automotive-battery, radio-frequency, and RF-connector references; pipe, tubing, HDPE, hydraulic-hose, AN and JIC fitting, and fuel-gas sizing; structural steel, square tubing, steel-grade, rebar, USCS and AASHTO soil-classification, galvanic-corrosion, and hardness data; floor- and deck-joist spans and sieve sizes; ball and needle bearing dimensions; electric-motor frame sizes; welding-rod and welding-symbol references; grease compatibility and oil-viscosity data; RTD and thermocouple temperature-sensor data; refrigerant pressure-temperature, superheat, and subcooling references; gauge thicknesses; V-belt dimensions; surface finish values; and bolt torque, bolt-head, nut, screw, nail, UNC thread, rivet, fraction-to-decimal, feeds-and-speeds, tap-drill, and drill-bit charts. The library also includes C-channel dimensions, conduit-bending references, plywood thicknesses, PVC pipe sizes, NPT thread dimensions, insulation R-values, propane tank sizes, oil-seal sizing, press-brake tonnage data, wire-nut sizing, Torx bit sizes, washer dimensions, bolt grades, and Allen/hex wrench sizes. Additional references cover circuit-breaker compatibility, LVL span sizing, gravel sizes, decibel and sound levels, HVAC duct sizing, and MERV air-filter ratings. Newer charts and tables include sandpaper grit sizes, Janka wood hardness, roller-chain sizes, saturated and superheated steam properties, roof pitch conversions, BSP thread dimensions, concrete curing times, I-joist spans, metal stud gauges, hose clamp sizes, excavator sizes, and cutting torch tip sizes.

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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