Knowledge References
15 calculators and reference tools for knowledge references. Every tool runs entirely in your browser. No account. No fee. No advertising. No tracking.
Tools in this group
- Wire / Pipe / Gas Color Codes - NEC, IEC, gas piping, and ASME A13.1 conventions in plain English.
- Knot Reference - Common rigging and rescue knots with typical strength reduction.
- Inspection Prep Checklist - Per-trade rough-in and final inspection checklists.
- Utility Locator and Emergency Contacts - 811, poison control, OSHA, NRC, and 911 - universal US numbers.
- Tool Maintenance Intervals - Maintenance schedule for common trades tools.
- Hand Signal Reference - Crane, excavator, flagger, and aircraft marshalling signals.
- OSHA Top-10 Citations - Most-recently published OSHA top-10 most-cited standards.
- Lockout / Tagout Steps - Step-by-step LOTO procedure (29 CFR 1910.147 cited by section).
- Defensible Space Reference - Zone-based defensible space practice (CALFIRE / NFPA by name only).
- Storm Shelter Spec Reference - FEMA P-320 published guidance for residential storm shelters (by name only).
- Field First Aid Triage Quick-Read - START triage categories. Not medical advice; call 911.
- IRS Form Quick-Read Index - What each commonly used IRS form is for, in one paragraph each. 1040, Schedule C / SE / E, Form 4562, 941, W-9, 1099-NEC, 1099-K.
- State Sales Tax Nexus Quick-Read - Post-Wayfair economic-nexus thresholds by state with citation and verified-on date. Reference only; verify with the state DOR before relying on for filing.
- OSHA Recordkeeping Quick-Read - 29 CFR 1904: who must keep records, recordable definition, Forms 300 / 300A / 301, posting period, retention, severe-injury reporting.
- Lab Safety Quick-Read (GHS + Spill) - GHS pictograms with signal words and hazards. One-paragraph spill-response decision tree (assess / evacuate / contain / report).