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How To

How to Read House Blueprints

Contributor
By Willa
eHow Contributing Writer
(1 Ratings)

Design a home that is suited for the lot you will build on. Whether it will be on a slab, crawlspace or basement, the elevation will determine what type of foundation will be allowed. A computer drawn blueprint may be adjusted to make changes if needed. A symbol legend makes it easy for an amateur to understand and provides exact details for the professional builder.

Difficulty: Moderately Challenging
Instructions

Things You'll Need:

  • Architect drawn plan
  1. Step 1

    Understand that a blueprint is a scaled drawing, usually drawn by computerized equipment. Originally, sketches were hand drawn on vellum sheets, placed on blueprint paper, then run through a blueprint machine.

  2. Step 2

    Use a scale measurement of 1/4 inches to equal one foot. This is used to determine the specific lengths and widths. Other scales may be used as in framing layouts or built-in details.

  3. Step 3

    Sketched to scale are the elevations of the front, rear and sides of the building. The ridge heights, lot grade and roof pitches are also drawn to scale.

  4. Step 4

    Know the size of the rooms, the location of the doors, windows and fixtures, by using symbols easy to recognize.

  5. Step 5

    Plan the electrical and plumbing layout, by referring to the symbol legend on the floor plan page. Symbols are used for the lights, switches, outlets, fans and plumbing. A cross section with details and the placement of the home on the building lot are also sketched to scale.

Tips & Warnings
  • Architect drawn blueprints are required by lending institutions.
  • Original blueprints may be changed or adjusted.

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