Chapter 13
Site Plan Layout
Links for Chapter 13
Site Design Considerations
Steps in Site Layout
Drawing Contour Lines
Drawing Profiles
Site Planning with CADD
2
Site Design Considerations
• Minimum driveway and lawn slope of 1/4” per
foot
• Single-car driveway at least 10’
• Double-car driveway at least 18’
• Minimum turn radius of 15’ for a driveway
3
Site Design Considerations
10' MIN
18' MIN
10' MIN
R 12'
MINIMUM
ONE CAR
18' MIN
MINIMUM ONE
CAR WITH PARKING
10' MIN
MINIMUM
TWO CAR
24'
18'
R10'
R15'
R 20'
17'
10' MIN
12'
10' MIN
R 12'
10'-12' MIN
TURNOUT APRON
PREFERRED
SIDE GARAGE
U-SHAPED DRIVEWAY
4
Site Design Considerations
• Leave room for expanded utilities
• Do not encroach on easements (property
right-of-way)
• Follow basic grading rules
• Identify remaining trees after construction
• Design retaining walls to minimize erosion
and maintain a level lawn
5
Property Lines
• Label boundaries with
a bearing and distance
• The Delta angle () is
the included angle of
the curve if the
boundary is not
straight
L=1 40.09'
L=6 8.92'
L=22.7 8'
L=48.3 9'
R=50.0 0'
A
CENTER
6
Steps in Site Layout
• Select the proper paper size and scale
• Lay out the site plan based on a given plat or
legal description using construction lines
– Draw only the outline of the floor plan
– Include setbacks, sidewalks, and other
features
7
Steps in Site Layout
8
Steps in Site Layout
• Darken all property and other lines
• Add dimensions and elevations
– Keep extension and dimension lines short
– Label important features
• Add north arrow, legal description, title,
scale, client’s name, and other pertinent
information
9
Steps in Site Layout
W
C
L
R=25.00' L=7 .71'
S
E L 100 '
E L 100 '
PROPOSED
3 B EDROOM HO ME
EL. MAIN FL. 101 .5'
E L 102 '
E L 101 .2 '
PLOT PLAN
SCA LE 1"=20'
LEGAL:
LOT 2 SANDY ESTATES
CITY OF HOUSTON,
COUNTY OF HARRIS,
STATE OF TEXAS
10
Drawing Contour Lines
• Grid Survey - Divides the plot into small
squares like a checkerboard
• Control Point Survey - Uses elevations
recorded on a map to create the plot
• Radial Survey - A series of angular and
distance measurements are established from
a given central point
11
Using Grid Survey
• Drive stakes into the ground in a grid pattern
at a particular elevation
• Space stakes at a common interval
• Label vertical lines with letters
• Label horizontal lines with numbers (stations)
• Transpose field notes onto grid
12
Drawing Contour Lines
• Draw a grid or create a GRID layer
• Label elevation at grid intersection using field
notes
• Determine contour interval and connect
points
• Estimate remaining lines
• Label elevation on index contour lines and
darken them
13
Drawing Contour Lines
A
B
C
D
E
F
1 01
1 00
98
95
94
92
0+00
1 04
1 02
1 00
97
96
93
0+20
1 08
1 05
1 02
99
98
95
0+40
1 12
1 10
1 08
1 05
1 00
98
0+60
1 05
1 04
1 02
1 00
95
90
0+80
1 02
1 00
95
94
92
85
1+00
14
Drawing Profiles
• Profile is a vertical section of the ground
surface and earth below
• Draw the profile line on the contour map
• Establish vertical scale
• Project a line vertically to elevation line from
each contour crossing of the profile line
• Draw the profile by connecting the points
15
PRO FILE
LIN E
Drawing Profiles
110
105
100
95
90
SCALE: 1" = 100 '
16
Drawing Grading Plan
ORIGINAL
PROFILE
• This plan shows the
elevations after
excavation
• It shows areas where
earth is removed
(cut) and added (fill)
LEVEL
EXCAVATION
1
1
CUT
FILL
CUT
1
1
ANGLE OF REPOSE
17
Drawing Grading Plan
• Determine the angle of repose and areas to
cut and fill
• Draw parallel lines to represent elevation at
the cut and fill
• Mark points where parallel lines and contour
lines intersect
• Connect all points and shade cut and fill areas
18
Drawing Grading Plan
EXCAVA TION AT
100' E LEVATION
94
96
98
FILL
FILL
102
104
106
19
Site Planning with CADD
• Site plans are more
accurate
• Symbols are loaded
into the program for
easy retrieval
• Terrain model shows
contour lines in 3D
20
Site Planning with CADD
21