Drafting techniques and Line Weights in Building Materials and Construction

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2. LINE WEIGHTS FOR DRAFTING
Guidelines and Construction lines: 2H to 4H pencil
The initial lines that you draw on your paper are guidelines or construction lines. These lines are
temporary and used to layout the page, create the initial shapes, and provide a guide for lettering
heights. The line weight for guidelines is to be very light as they should be almost invisible on the finished
drawing.
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3. LINE WEIGHTS FOR DRAFTING
Bold lines: B to 2B pencil
The primary objects in a drawing should be created using a bold line. Bold lines are very dark and have
a thick width.
Walls in plan view and the outline around the perimeter of an elevation or three dimensional object are
examples where bold lines should be used.
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4. LINE WEIGHTS FOR DRAFTING
Medium lines: HB pencil
Secondary objects such as doors, furnishings, counters and cabinets should be drawn in a medium weight.
In elevation and 3D views, the perimeter of an object may be drawn in a bold line weight, however the
information inside the object should be drawn in medium weight.
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5. LINE WEIGHTS FOR DRAFTING
Light lines: H to 2H pencil
Action lines, information lines and fill patterns should be drawn with light lines. Action lines show potential
movement of an object and include door swings in plan view and hinge direction in elevation view.
Information lines convey information about a drawing and include dimension lines, center lines, leader
lines, section lines. Fill patterns are specific symbols used to indicate a type of material being used.
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6. LINE TYPES FOR DRAFTING
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7. LINE TYPES FOR DRAFTING
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8. LINE TYPES FOR DRAFTING
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9. ARCHITECTURAL GRAPHIC SYMBOLS
MATERIAL SYMBOLS IN SECTION MATERIAL SYMBOLS IN ELEVATION
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10. ARCHITECTURAL GRAPHIC SYMBOLS
DOOR SYMBOLS IN PLAN VIEW WINDOWS SYMBOLS IN PLAN VIEW
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11. ARCHITECTURAL GRAPHIC SYMBOLS
DOOR SYMBOLS IN ELEVATION VIEW WINDOWS SYMBOLS IN ELEVATION VIEW
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12. ARCHITECTURAL SCALE DRAWING
SCALE
A drawing scale allows real objects and/or subjects to be accurately
represented at fixed reduced and enlarged sizes, which can then be
measured via a scale rule to determine their real world size.
The chose of scale is determined by the type of drawing, the size of the
subject and the size of paper or document that you wish to present it on.
For example a construction detail of a wall junction needs to be a much
larger scale than a general section of the whole building.
The wall detail might have a scale of 1:10 or 1:5, whereas the general
section is likely to be 1:50 (in metric units)
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13. ARCHITECTURAL SCALE DRAWING
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