The Trades

Research, insights and advice from craftsmen and industry experts

Complete Guide to Blueprint Symbols: Floor Plan Symbols, MEP Symbols, RCP Symbols, and More

An architectural plan, or set of blueprints, is created by architects, engineers, and designers to lay out all the construction specifications of a house, such as dimensions, building materials, installation methods, techniques, and even the order in which these things must be accomplished.

The number of details that must be included in a complete set of blueprints is so large that architects reduce the information on the drawings to a set of standardized symbols and abbreviations in order to make the drawing easier to read and less cluttered.

For reference, every set of architectural drawings includes a symbol legend. If you aren’t familiar with a symbol, you will be able to find it in the legend. Floor plan notes give additional context for the building. For instance, the notes can clarify exactly to what point on a wall dimensions should be measured.

Most plans include symbols that are a combination of: 

  • Appearance (for instance, a bathtub looks like a bathtub)
  • ...
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How To Become a Contractor: Career Path, Salary, and Professional Tips from Builder Jordan Smith

The construction industry is incredibly exciting for those who are ambitious, entrepreneurial, and eager to see the fruit of their work in the real world. Job growth in construction is expected to be significantly above average in the near future, thanks to a significant gap between the number of workers employed in the sector and the need for them. The Bureau of Labor Statistics forecasts that employment within construction will grow by 10 percent over the next decade—and that’s coming on top of steady growth that started around 2010. 

Demand from both the public and private sectors fuels the construction industry. The United States must upgrade or replace aging infrastructural buildings, and incorporate the latest advances in construction materials and technology into existing buildings. The COVID-19 pandemic—while forcing a pause in the global economy—may also lead to new streams of construction work, as commercial and residential real estate will...

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Five Building Materials Commonly Used in Construction

Uncategorized Jul 02, 2020

The construction industry uses a variety of building materials for different aspects of a home build. Architects consult with structural engineers on the load-bearing capabilities of the materials with which they design, and the most common materials are concrete, steel, wood, masonry, and stone. Each has different strength, weight, and durability, which makes it right for various uses. There are national standards and testing methods that govern the use of building materials in the construction industry, so that they can be relied on for providing structural integrity. Architects also choose materials based on cost and aesthetics.

Building materials are usually categorized into two sources: natural and manmade. Materials such as stone and wood are natural, and concrete, masonry, and steel are manmade. But both must be prepared or treated before they’re used in building. Here is a list of building materials that are commonly used in construction. 


1. Steel


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5 Types of House Foundations

One of the most important decisions you’ll make when building a house is determining the kind of foundation it will rest on. After all, the foundation serves the essential functions of keeping your home in place even as the ground beneath it might shift, insulating it, keeping the moisture out, and keeping it level—even if your house is built on a hill with a 45-degree angle. Builders choose foundations based on the home’s location and climate, soil conditions and area humidity, and of course, the budget.

5 Types of House Foundations

There are five main foundation types and a handful of important variations.   

1. Basement Foundation

A full basement foundation begins with a hole of at least eight feet deep to accommodate an underground living space whose floor space matches most or all of the home’s ground level. You’ll place structural foundation walls on concrete footings that run the perimeter of the basement. Those footings need to be...

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Construction Abbreviations Commonly Used in Blueprints

  1. Blueprints can be up to 50 pages long, with a lot of intimidating symbols, abbreviated text, and lines. But in fact, each diagram in an architectural package is a simple concept, and blueprints are a set of diagrams that stack those concepts on top of one another.

Why are abbreviations used in construction?

Building architects and designers are responsible for communicating countless things about a building’s construction: where it should be located on the lot, how it should be built, what materials should be used, what it should look like, and where the MEP systems that make it function go. To save space on blueprints and simplify information sharing, designers use a set of abbreviations and acronyms. 

Most of these abbreviations are standard across the trades. But some architects might use their own abbreviations that aren’t standard or well known. So the title page of the architectural package includes an abbreviations block to help you decode these custom...

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What Is a Sectional View? 6 Types of Sectional Views

A floorplan is the building plan that is most familiar to most people: a bird’s-eye view of a building with all the elements laid out on a horizontal plane. A section, however, gives a vertical view—which is equally essential. 

What is a sectional view? 

Professional builder Jordan Smith likens sectional views to taking a laser and slicing it through a part of the construction, so that you can see how elements of a building fit together vertically. In his Introduction to Reading Blueprints class, he explains:

“On a floor plan, we take a laser and we cut the house in half horizontally. We set the roof off to the side, we look down from the top, and we see our walls and our floor without the roof getting in our way. Sections are very similar to a floor plan, but instead of looking from the top down, we're looking across at the vertical section of a house. We're looking at the exterior of a house, and then we take our laser and we cut a slice off the...

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What Is a Reflected Ceiling Plan?

A reflected ceiling plan (RCP) is a print that shows you the dimensions, materials, and other key information about the ceiling of each of the rooms represented on your blueprint. It takes its name from the idea that you are looking down at the ceiling as though there were a mirror on the floor reflecting the ceiling’s plan back to you.

 Architects and builders draw reflected ceiling plans this way so that the orientation of the floor plan and the orientation of the ceiling plan are the same—and therefore easier to read. In other words, you are looking down at a view of both the ceiling and the floor. 

In his Introduction to Reading Blueprints course, builder and craftsman Jordan Smith explains:

“Sometimes we'll do a reflected ceiling plan on the floor plan, which means that whatever's happening up on the ceiling is reflected down on the floor and then drawn for our benefit as builders.”

Think of it as an engineering document that is...

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What Is a Site Plan? 11 Things Good Site Plans Must Include

If you’re building a simple project like a shed, simply sketching the details on a piece of paper will give you most of the information you need. But when you’re building a house or commercial project, you need a far more detailed plan. 

What is a site plan?

A site plan—sometimes called a plot plan—is an architectural document that functions as a readable map of a building site, giving you all the details you need to know about how the structure will be oriented on the lot. A builder or contractor will create a diagram that shows the plot of land and its property lines, along with its landscape features, structural elements, setbacks, driveways, utility poles and power lines, fencing, and on-site structures. 

Even landscape elements that don’t sit right on your property might be recorded on a site plan, says Jordan Smith, because the site notes can contain valuable information that impact your property. For instance, a tree on a...

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What Is an Architect Scale Ruler and How Do You Use One?

Architectural plans are drawn to all different scales, ranging from the simple (1 inch = 1 foot) to the complex (3/16 inch = 1 foot). Plans are often drawn at 3/4, 3/16, 1/8, and other scales (in each case the dimension in inches here corresponds to one foot). 

When you’re faced with figuring out how to convert a two-inch line drawn at a 1/4-inch scale on one drawing to another plan that uses a scale of 1/16 of an inch, the math can quickly become confusing. Fortunately, an essential tool of architects makes the process of decoding the scale of architectural and engineering drawings simple—an architect’s scale ruler (also known as an architectural scale ruler).  

What is an architect scale ruler? 

A triangular architect scale has a total of six edges, often with two different scales—say both 1 inch to 1 foot and a ½-inch to 1 foot—represented on the same edge. Some sets with multiple rules can include up to 16 scales. These...

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What Is a Shear Wall and Why Do Buildings Need Them?

Being able to identify the various types of walls on a structural plan is an essential skill, but it’s also important to know what makes each type of wall unique. Professional builder Jordan Smith explains in his Introduction to Reading Blueprints course:

“When you're reading a blueprint, you understand that all walls are not the same. You have shear walls, you have load-bearing walls, and you have architectural walls.”

What is a shear wall? 

While columns and load-bearing walls keep buildings standing up, carrying the compression load of the structure down to its foundation, the shear wall is what keeps structures from blowing over, resisting the lateral forces of wind and seismic activity.

How do shear walls work?

Understanding all the physics of shear walls may require an education in structural engineering, but a simple way to grasp how they operate is to imagine a wooden square with four edges—essentially two columns and two beams. This...

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