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Topic 2 Reading Blueprints and Drawings. SCO 2.11. SCO. Students will be expected to: 2.11 correctly interpret drawing units and scale [ 1.401][1.402][1.403][2.401][2.402]. Why?. The purpose of this outcome is to help students understand the use of measurement and scale in drawings.
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SCO • Students will be expected to: • 2.11 correctly interpret drawing units and scale [1.401][1.402][1.403][2.401][2.402]
Why? • The purpose of this outcome is to help students understand the use of measurement and scale in drawings.
What are we talking about here? • Drawings may larger than, equal to, or smaller than the actual objects they represent. Very few objects are of a size that is convenient to represent the actual size in a drawing. • Most are smaller or larger than the drawing. • Buildings fall into the latter category, for example.
How does this apply to Skilled Trades? • To accurately represent larger objects in a drawing, a scale must be used. • One unit of measure in the drawing represents a larger unit of measure in the real object. • In the imperial system, a typical scale for a house plan is 1/4 inch on the drawing represents 1 foot in the real world. • For a metric drawing a scale can be 10:1, 20:1 or 50:1. • Drawings also use dimensions to indicate actual size.
Scale ensures that drawings are an accurate representation of the object. • While dimensions are placed on most drawings, sometimes it is easier to just measure the drawing and convert to the actual size using the scale.
Given a partially dimensioned drawing, with a background grid, answer the following questions • What is the total length and width of the building? • What is the size of each of the smaller offices? • What is the size of each window, and what is the distance from the center of each window to the outside edge of the left side of the building.
