Contractor Quick Reference
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Reference Data
Ampacity tables, pipe dimensions, span charts, and code requirements — in one fast, no-BS reference. All data sourced from NEC, IRC, and IBC. Always verify with your local AHJ.
For informational reference only. Not a substitute for professional judgment, licensed engineering, or local code verification.
Electrical 01
Wire Gauge Charts
AWG ampacity tables, insulation types, and breaker sizing for copper and aluminum conductors.
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Plumbing 02
Pipe Sizing Reference
Flow rates, OD/ID dimensions, and material comparisons for copper, PEX, PVC, ABS, and more.
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Structural 03
Load Capacity Charts
Floor joist span tables, live/dead load requirements by occupancy, and common lumber actual dimensions.
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Electrical 04
GFCI & AFCI Requirements
NEC code requirements by location — where GFCI and AFCI protection is mandatory in residential construction.
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Structural 05
Concrete Mixes & Fasteners
PSI requirements by application, water-cement ratios, and shear/withdrawal values for common fasteners.
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Sources: NEC 2023 · IRC 2021 · IBC 2021 · AWG Standard · ASME B36.10 Last reviewed Q1 2026