Knowledge Base
Construction references, symbols, and checklists for professionals
ADA Accessibility Quick-Reference
Visual guide to ADA requirements including ramp slopes (1:12), door clearances, turning radii, and restroom dimensions.
Fire Rating Pattern Guide
Line types for fire walls, fire barriers, and smoke barriers. Includes door ratings and assembly requirements.
Egress Path Basics
Calculate occupancy loads and exit widths. Includes load factors, width multipliers, and worked examples.
Top 5 MEP vs. Structural Clashes
Common clash types between MEP and structure: ductwork vs beams, plumbing vs columns, and how to prevent them.
RCP Coordination Guide
Coordinating lights, diffusers, sprinklers, and smoke detectors in the ceiling plane. Priority order and conflict resolution.
Standard Sheet Organization
NCS sheet naming conventions explained. Why sheets are named A-101, S-201, M-301 and the discipline designators.
Understanding Line Weights
What heavy, medium, and light lines mean in construction drawings. Cut lines vs visible edges vs dimensions.
Electrical Plan Symbols
Comprehensive guide to electrical symbols including power, lighting, fire alarm, security, and communications.
HVAC Plan Symbols
Common HVAC symbols for mechanical drawings. Includes diffusers, dampers, piping, and sensor symbols.
Structural Plan Symbols
Structural engineering symbols for connections, framing systems, and slab conditions.
Plumbing & Fire Protection Abbreviations
Common abbreviations found on plumbing and fire protection drawings. Quick reference for mechanical plans.
Civil Engineering Abbreviations
Comprehensive list of abbreviations for civil engineering and site development drawings.
Construction Drawing QA/QC Checklist
Comprehensive checklist for reviewing construction documents before they reach the field.