Drawings & Engineering
Floor Plan Symbols Explained: A Guide for Homeowners
How to read the symbols and abbreviations on residential floor plans, from wall types and door swings to electrical, plumbing and reference markers.
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Drawings & Engineering
Articles about drawings & engineering.
Drawings & Engineering
Egress Window Requirements for Bedrooms and Basements
The opening sizes, sill height and window well rules for emergency escape openings, where they are required, and how to show them on permit plans.
Drawings & Engineering
Elevation Drawings: What They Show and Why Permits Need Them
What exterior elevation drawings show, which projects need them, the heights and notes reviewers check, and how they work with floor plans and sections.
Drawings & Engineering
How Building Height Is Measured for Zoning
The common ways codes measure building height, the reference grade options, exemptions for chimneys and equipment, and worked examples for pitched roofs.
Drawings & Engineering
Roof Pitch Explained: Measuring, Materials and Permits
What roof pitch means, how to measure it on an existing house, which materials suit which slopes, and how pitch affects building height and permits.
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