Building Skills

Blueprint-Reading Basics: How to Navigate a Set of House Plans

comments (3) February 25th, 2011 in Blogs

Rob Wotzak, Web Producer

Video Length: 2:47
Produced by: John Ross

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As you work through the trades, sooner or later you’re going to have to start looking at plans. They may seem like a jumble of information but there is an order to them that breaks the information into digestible bits.

Most plans start with the elevations.

These are the drawings that show how the house is supposed to look when it’s all set and done. Each elevation drawing represents what you will see when you're standing outside looking at one particular side of the house.

Floor plans or plan view

Move beyond the elevations and you come to the floor plans. there should be a plan view for every floor in the house: basement, first and second floor, attic — whatever you've got. The drawings all look straight down from a bird's-eye-view. There is a ton of information: wall dimensions, beam placement, stair placement.

Following important symbols

The symbols that identify each drawing help you find your way around the construction documents. They often have an arrow, and a letter over a number. We're looking at one in the video that redirects to page six, building section D. Section drawings like this one look as if the house has been sliced through, like a dollhouse opened up.

In the section, there's a part of the foundation that is circled, and it has more reference numbers. Whenever you see these letters and numbers, it means go to another place and get more information.

Getting all the details

We've found our way to a detail drawing with very specific information about the concrete foundation wall: what type of rebar to use, how much space to put between the rebar. All this information is crucial because it has been engineered this way. As you build, you need to makes sure your wall matches this detail exactly otherwise you’ve made a mistake.

Working step by step

By working through the plans, going to step by step from very general information to very specific information you can make sure you incorporate every important detail into the house you're building.

Further Resources:

Energy Efficiency and Floor Plans

Revitalize Tired Floor Plans

posted in: Blogs, business, architecture, measuring and marking tools, floor plans

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Comments (3)

nosmo writes: A Floor Plan drawing is not a view of the top plates. You would not see door openings or window openings, for example. It is really a horizontal section cut at an advantageous height, often somewhere above countertop height and below upper cabinet height, for example. Always look at the elevations for high windows not shown on the plan view.
Posted: 9:31 pm on April 28th

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Posted: 11:07 am on April 5th

LFR writes: I enjoyed the video. Would have been helpful if information about all the plans needed for home construction were presented, such as electrical, HVAC, plumbing, etc.
Posted: 10:32 am on February 28th

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