How to Interpret Home Design Blueprint
All floor plans are drawn to scales of often one-quarter of an inch or one-eighth of an inch to one foot. What this translates to is every one-quarter or one-eighth of an inch on the drawing plans equals one foot in actual size.
Using a scale rule is by far the easiest way to translate scale measurements into their actual size. On plans drawn to a one-quarter of an inch scale, for example, two inches equal eight feet of actual space. Every page of the home plans will be labelled to indicate the scale the architect or home designer used when drawing the floor plans.
Measurements will be labelled directly on the blueprints as dimension lines, which show as solid lines with a slash or triangle at either end of the line, making the space between the two marks equal to the distance noted next to the line. Vertical measurements are also indicated with dimension lines and section drawings usually include dimensions that indicate the ceiling height of the room.
There are a number of triangles, hexagons and circles with numbers inside of them. These symbols are placed by the windows, doors and other elements, such as lighting fixtures and plumbing fixtures. These notations should correspond to those on the window, door, plumbing, and electrical schedules found as schedules at the back of the house blueprints. Schedules indicate the type, size and number of the doors and windows to be used including manufacturers and sometimes the model numbers as well.
Sometimes the circle symbols may include an arrow on one side that points in the direction of the view depicted in the section drawings.
And on a last note, while all symbols used in house designs and floor plans are too many to mention, it's good to be familiar with the most standard ones. For example, thick solid lines indicate full height walls, while thin solid lines indicate other built-in features and structures like fixtures, cabinets or shelves. And thin dotted lines indicate overhead features like kitchen wall hung cabinets, or an arched opening in the dining room.