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Chapter 2

Chapter 2. Architectural Drafting Equipment. Links for Chapter 2. Drafting Supplies. Drafting Instruments . Drafting Machines. Scales. Drafting Supplies. Mechanical Pencils - The lead is manually inserted and sharpened as needed

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Chapter 2

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  1. Chapter 2 Architectural Drafting Equipment

  2. Links for Chapter 2 Drafting Supplies Drafting Instruments Drafting Machines Scales

  3. Drafting Supplies • Mechanical Pencils - The lead is manually inserted and sharpened as needed • Automatic Pencils - The lead advances as button or tip is pushed • Lead Grades - Depends on the type of line • Thick Lines - 2H to F • Thin Lines - 4H to H

  4. Drafting Supplies • Pencil Motion - Keep pencil tilted at 45º with the direction of travel • Provide even pressure to create sharp crisp lines • Slowly Rotate the mechanical pencil as the line is drawn • Practice this technique as often as possible

  5. Drafting Supplies • Technical Pens - Used to create inked lines • Erasers - Use the correct eraser for the job • Do not press too hard to rip the material • Erasing shields protect good lines • Use a dust brush to remove the eraser particles

  6. Drafting Instruments • Compasses - Used to draw circles and arcs • Drop-bow is used for small circles • Center-wheel is used by professional drafters • Beam is used for large arcs or circles • Keep the compass needle sharp and the lead point sharpened like a chisel point

  7. Drafting Instruments • Dividers - Used to transfer dimensions or divide distances • Parallel Bar - Slides up and down the drafting board by cables mounted on pulleys • Triangles - Two standard types • 30º-60º-90º is known as 30º-60º triangle • 45º-45º-90º is known as 45º triangle

  8. Drafting Instruments • Templates - A plastic sheet that contains standard symbols used for tracing • Be sure the scale matches your drawing • Keep both sides clean • Irregular Curves - There is no constant radii and is commonly called a French curve

  9. Drafting Machines • Arm Drafting Machine - The arm clamps to the table and the head can rotate to a variety of angles with different scales attached to it • Track Drafting Machine - The traversing arm moves left and right across the table and the head can also lock and pivot

  10. Scales • Notation - Scale of the drawing is noted in each title block • Architecture - 1/4”=1’-0” or 1”=1’-0” • Civil - 1”=50’ or 1”=500’ • Metric - Scale is based on the meter (m) unit • Millimeter (mm) is most commonly used on drawings

  11. Scales • Architect’s Scale - Contain 11 different scales • Locate the correct scale before beginning • Ten of the scales are based on the inch unit • Other scale is divided into 1/16th of an inch • Be careful when reading from left to right • The 1/4”=1’-0” is the most common scale

  12. Scales • Civil Engineer’s Scale - Contain 11 different scales • Locate the correct scale before beginning • The scales are based on the inch unit in multiples of 10 • Be careful when reading from left to right • The 50 scale is most popular

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