What Is A Scaled Drawing

A scaled drawing is one where an object that is being drawn is large or the object to be represented in the drawing is such a size that it’s impossible to draw full size on a sheet that can be conveniently handled in the shop where a part is being fabricated. In such cases, the drawing is made at a reduced scale, and is called a scaled drawing.

The text book definition is: “A scaled drawing is one in which the length of all the lines of the drawing bears a definite ratio to the length of the corresponding lines of the object. Thus, in a drawing made one-half size, each line of the drawing will be one-half the length of the corresponding line of the object.”

Say for instance you are creating fabrication drawings for a dumpster. If you draw this to full scale, the paper would have to be in excess of ten feet tall by sixteen feet long. This would be a hard drawing to drag around a welding shop, so we would reduce it to one eight it’s size on the paper. Once reduced, it would fit on a two foot tall by three foot long sheet of paper. A note or label would then be placed on the drawing that says 1/8″ = 1″ (one eighth inch equals one inch) so that it can be measured using a scaled ruler.

With this type of scaling, more than one view of the item we are drawing can be placed on a sheet like the front, rear, side or sides, bottom, top, and even an angled view called an isometric view.

Tim Davis, a fully trained general drafter with 30 years experience, has created a virtual drafting school where many of these drafting disciplines are taught in a easy to understand format at http://technicaldrawing.us.

Timothy on FacebookTimothy on RssTimothy on StumbleuponTimothy on Twitter
Timothy
I'm your host and webmaster. I'm someone who enjoys life to it's fullest and love programming, drafting, farming, and an ordained Baptist pastor and sheriff's department chaplain.

Comments are closed here.