Engineering references and guides
Engineering Resources
Choose a resource category, then browse focused references for formulas, symbols, GD&T, fasteners, hole sizes, structural sections, design data, and engineering software workflows.
Resource directory
Browse by reference type
Design References
Fastener, gear, drill, fit, surface finish, keyway, weld, and machining references for design work.
5 resourcesFormula Sheets
Quick formula references for geometry, cross-sections, moments of area, volumes, surfaces, and trigonometry.
3 resourcesGD&T Guides
Plain-language GD&T and drawing interpretation guides for engineering drawings.
28 resourcesHole Sizes
Clearance, counterbore, and countersink hole size charts for common fastener standards.
9 resourcesSoftware Guides
Command and function references for CAD, programming, engineering analysis, and technical documentation tools.
4 resourcesStructural Tables
Beam, channel, angle, and HSS section property references for structural and mechanical design checks.
5 resourcesSymbols
Engineering symbols, constants, GD&T symbols, surface finish symbols, and LaTeX notation references.
About EngLab resources
Engineering Reference Resources, Charts, Formula Sheets, and Guides
Use EngLab's engineering resources to find technical charts, formula sheets, symbols, notation guides, structural references, mechanical design references, hole size charts, GD&T guides, and software command references. The resource library supports practical design work, study, drafting, calculations, documentation, and quick engineering lookups across mechanical, structural, manufacturing, and general technical workflows.
Browse free engineering reference guides for common formulas, drawing symbols, tolerance notation, fastener and hole sizing, structural steel information, CAD and software shortcuts, and frequently used technical data. These pages are designed to complement EngLab's calculators, unit converters, property tables, and material database when you need reliable context around a calculation or design check.