This document discusses different types of lines used in architectural drawings. It defines a line and describes various line types including outlines, margin lines, dimension lines, extension lines, construction lines, hatching/section lines, leader/pointer lines, border lines, short and long break lines, hidden/dotted lines, and center lines. It explains the purpose and characteristics of each line type. The document concludes with an assignment asking students to draw different line types in a composition considering shape, contour, texture and tone.

1. L E C T U R E - I I
DRAFTING OF LINES
ARCHITECTURE DRAWING

2. To make students understand different types of lines used
in architectural drawing with various grades of pencils (B
& H grades) for the better understanding of line intensity
INTENT

3. CONTENT
What is a line.
Different types of lines.
Purpose of lines.
Major line work
Assignment

4. WHAT IS A LINE
A line is a continuous mark made by a pencil, brush, pen
or other tool.
Lines can be thick or thin, straight or curved, jagged or
smooth, light or heavy.
Lines can also be suggested by the shape and massing
of a building.
For instance, a building can look horizontal or vertical.

5. Ar. Hena Tiwari,GCAD,Sonipat
DIFFERENT TYPES OF LINES
Outlines :
These are the lines which are drawn to represent the
visible edges and surface boundary of the object.
These are continuous thick and wide lines.

6. Ar. Hena Tiwari,GCAD,Sonipat
Margin lines:
They are continuous thin lines.
They are used at the starting of the drawings.
Sheet edge
Margin line

7. Ar. Hena Tiwari,GCAD,Sonipat
Dimension lines
These lines are continuous thin lines.
They are used to denote the dimension of the
objects.
3 cm.

8. Extension or projection lines:
These lines also are continuous thin lines.
They extend by about 3mm beyond the dimension
lines.
Extension line

9. Construction line:
These lines are drawn for constructing figures.
They are shown in geometrical drawings only.
They are continuous thin light lines.

10. Hatching / section line:
These lines are drawn to make the section evident.
They are continuous thin lines and are drawn
generally at an angle of 45 degree to the main
outline of the section.
They are uniformly spaced about 1mm to 2 mm
apart.

11. Leader / pointer line:
These lines are drawn to connect the node with the
feature to which it applies.
It is a continuous thin line.
Border line:
Perfectly rectangular working space is determined
by drawing the border lines.
They are continuous thin lines.

12. Short break line
These lines are continuous, thin and wavy.
They are drawn freehand and are used to show a
short break, or irregular boundaries.
Long break line
These lines are thin ruled lines with short zigzags
within them.
They are drawn to show long breaks.

13. Hidden/ dotted line
Interior or hidden edges and surfaces are shown by
hidden lines.
They are also called dotted lines.
They are of medium thickness and made up of
short dashes of approximately equal length of
about 2mm spaced at equal distances of about 1
mm.

14. Centre line
Centre lines are drawn to indicate the axes of
cylindrical, conical or spherical objects or details,
and also to show the centers of circles and arcs.
They are thin, long, chain lines composed of
alternately long and dot spaced approximately 1
mm apart.
The long dashes are about 9 to 12 mm.

15. PURPOSE OF LINES
Line can be used to show
shape,
contour,
texture
& tone.

16. Ar. Hena Tiwari,GCAD,Sonipat
Durer & Van Gogh are well known for their line
work.
Albrecht Durer Vincent Van Gogh
NOTABLE PERSONALITIES

17. Albrecht Durer Work

18. Vincent Van Gogh Work

19. Draw different types of lines on the sheet.
Make a composition using different types of lines
consider shape, contour, texture and tone.
ASSIGNMENT
TIP
First draft in light pencil ( h grade) after that final it with HB or
B grade pencil.