Why so many different ways to represent an object?
Different drawings are used for different purposes. Multiview, or orthographic, projection drawings are typically used for manufacturing different objects. These drawings are usually fully dimensioned so an individual can cut or shape the object.
Isometric and Oblique Projection drawings are used to give you a good sense of what the object should look like or how it should be assembled. If you buy furniture, models, or carburetor rebuild kits that needs assembled, these are typically the types of drawings you get with them. You do not need dimensions, just assembly instructions. Isometric and obliques are not true in the sense that they do not represent an object completely because the do not take into consideration that objects become smaller as they get farther away. They are easier to draw than perspectives which take depth perception into consideration.
Perspective drawings utilize vanishing points to give you a sense of depth. They are most typically used in architecture to represent pictorial views of a building or other structure. They are more time consuming to produce, but allow for more artistic expression.
Development drawings are used whenever an object needs to be drawn on a flat material, then folded into a final shape. The HVAC industry is always looking for someone with these skills in order to produce unusual ductwork from sheet metal.
Three-dimensional drawings are produced on CADD (computer-aided drafting and design) programs and continue to grow out of industrial needs. All of the above described drawings are flat, 2D drawings that can be done on the table or any 2D CADD program. Their limitation is that they cannot be easily converted into any other type of drawing. A true 3D drawing can be used to generate any of them quickly and easily. Another benefit of 3D drawing is that it can be easily used with CNC (computer numeric controlled) machines that can manufacture the parts. 3D drawings can also give you photographic quality renderings and animations. If you watch movies like Toy Story you would be surprised as to how much drafting and CADD was used to produce the movie. 3D computer games also utilize much of what is learned in drafting.
Architectural Drawings Completed In Class
Site plans are used to show how the house will be built on the site along with how the property will be surveyed. The contour of the ground is displayed (topographical mapping) along with existing and proposed plantings. Utilities are also represented on the plans.
Wall Sectional Views
Sectional views are used to communicate the architect's plans for constructing the house to the contractor. A sectional view is like slicing your house and looking at the layers from siding or brick, insulation, studding, and drywall. Structural calculations are also examined to make sure we're designing a safe and secure structure.
Floor plans are what most people commonly see and recognize They show room layouts, dimensions, furniture plans and labels. We examine adequate room layouts and sizes along with proper placement of areas to get the most out of natural lighting and environmental conditions.
Floor Plan Electrical
We also complete basic electrical plans where we examine National Electrical Code requirements and apply it to our house designs. We develop lighting and outlet plans to best fit the layout of the houses.
Foundation plans include similar information as the floor plans plus utilities and foundation layouts. We examine things such as appropriate footing sizes, drainage, and frost lines.
Elevations show the outside views of the house along with basic dimensions, window/door types, venting and materials.
Perspective views of the house show a sense of realism with plantings and walks. Students can generate exterior and interior elevations of their house. 3D computer renderings are taking the place of many hand-drawn perspectives.
3D Renderings and Animations
With improvements in computer software, 3D renderings and animations are becoming easier and easier. Both of these are available to students in the lab.