Unit 1: Design Process 1.2: Intro to Sketching 1.2.2: Sketch Conventions Technical sketches follow a set of rules or standards to describe a shape. A line is a physical connection between two points. A shape is a two dimensional object that is bounded. A shape has area. A solid is a three dimensional object. The focal point is the point of an object that you are viewing, building or measuring from. CAD stands for Computer Aided Design.

Figuring out your top from your…… Height, Width, or Depth

This end up. Convention sets the orientation for most objects. While a box has a top and bottom, the side that is closed is typically thought of as the bottom. Sometimes there are additional clues.

Sometimes this matters.

A shape is a two dimensional object that is bounded. A shape has area. A line is a physical connection between two points. The length of the line describes the distance between these points. A solid is a three dimensional object. A solid has volume and density.

In the design and construction fields, height and width are set as a matter of convention – this means that there are standards that everyone is expected to follow – even the builder of Wayside School! In this culture, we read information from left to right and top to bottom. The orientation with which we commonly view an object is from the front face.

What was the problem with Wayside School? Was it 30 classrooms wide or 30 classrooms high? What happened and who screwed up?

Layout is a function of space. If you have a tall object you orient your material to the long side of the object. If you wish to draw a picture of a person, you would put your subject into the drawing so that the person’s south end was at the bottom of the page and their north end was at the top. This is called portrait layout.

When a subject is longer along the horizontal or “X” axis than it is tall, we use landscape layout to display it.

Width, Depth, and Height All three-dimensional objects have width, height, and depth. Width is associated with an object’s side-to-side dimension. Height is the measure of an object from top-to- bottom. Depth is associated with front-to-back distance.

Length is the distance between two points. When the line is in the X plane, it describes the WIDTH of an object. When the line is in the Y Plane, it describes the HEIGHT of the object.

What is the width and height of each object? 7 inches 5 inches 9 inches 4 inches Be sure and include the units of measurements.

Width, Depth, and Height

45 ° Width, Depth, and Height

Multiview Drawing with dimensions provide the information to build what you draw.

The Rules Unless there are visual clues or signs, width is the side of the object that you are facing. It is measured from left to right. It is the FRONT Face Depth is the measurement of the object from front to back. Height is the measurement of an object from bottom to top. But could I say….. right to left, orback to front, or top to bottom?

18 feet 40 feet What is the width and depth of this townhouse? The orientation for this town house is determined from the location of the front door. The front door is the focal point. This townhouse is 18 feet wide and 40 feet deep. It is 18 X 40.

What is the width and depth of this house? What clues do you have to determine the focal point? What is the front face of this object?

60 feet 50 feet