Installation Instructions

41
RETAINING WALLS
Geogrid
The required type, length, vertical spacing, and strength of geosynthetic vary with each project depending on wall
height, loading, slopes, and soil conditions. Poor draining soils such as clay require more geogrid than granular soils,
which drain well. Typically, grid should be placed every 2 or 3 courses and should extend back a distance about equal
to three-quarters the height of the wall. The number of layers of grid that will be required and how far back the grid
should extend shall be determined by your engineer. See Midwest Manufacturing Engineering for more details.
These geogrid tables are for preliminary use only. They should not be used or relied upon for any application without
verication of accuracy by a qualied engineer.
Drain Pipe
The length of the wall will in most
cases determine the amount of
drainpipe needed. Check the
plan for exact specications and
locations of the drainpipe.
Concrete Adhesive
Use one 10.5-ounce tube of adhesive
for every 14 ft. of wall length where
Step/Caps and Corners are installed.
Use one 29-ounce tube of adhesive for
every 39 ft. of wall length where Step/
Caps and Corners are installed.
ø=34 deg. 120 pcf, No Surcharge,
No Slope, Sand and Medium Gravel
5 3.33 0.5
6 4.00 0.5
7 4.67 0.5
8 5.33 0.5
9 6.00 0.5
10 6.67 0.5
11 7.33 0.5
12 8.00 0.5
13 8.67 0.5
14 9.33 0.5
15 10.00 0.5
# of Wall Embedment
Units Height (ft) (ft)
# of Wall Embedment
Units Height (ft) (ft)
# of Wall Embedment
Units Height (ft) (ft)
# of Length
Rows (ft)
# of Length
Rows (ft)
# of Length
Rows (ft)
1 4
1 4
2 4
2 4
2 4.28
3 4.66
3 5.04
3 5.42
4 5.81
4 6.19
4 6.57
ø=34 deg. 120 pcf, 250 psf Surcharge,
No Slope, Sand and Medium Gravel
2 1.33 0.5
3 2.00 0.5
4 2.67 0.5
5 3.33 0.5
6 4.00 0.5
7 4.67 0.5
8 5.33 0.5
9 6.00 0.5
10 6.67 0.5
11 7.33 0.5
12 8.00 0.5
13 8.67 0.5
14 9.33 0.5
15 10.00 0.5
1 4
1 4.5
1 6.1
2 4.7
2 5
2 5.38
3 5.76
3 6.14
3 6.52
4 6.91
4 7.29
4 7.67
5 8.05
5 8.43
ø=34 deg. 120 pcf, No Surcharge,
21.8 deg. Slope, Sand and Medium Gravel
4 2.67 0.5
5 3.33 0.5
6 4.00 0.5
7 4.67 0.5
8 5.33 0.5
9 6.00 0.5
10 6.67 0.5
11 7.33 0.5
12 8.00 0.5
13 8.67 0.5
14 9.33 0.5
15 10.00 0.5
1 4
1 4
1 4
2 4
2 4.39
2 4.87
3 5.35
3 5.83
3 6.31
4 6.79
4 7.27
4 7.74
6 3.00 0.5
7 3.50 0.5
8 4.00 0.5
9 4.50 0.5
10 5.00 0.5
11 5.50 0.5
12 6.00 0.5
13 6.50 0.5
14 7.00 0.5
15 7.50 0.5
16 8.00 0.5
17 8.50 0.5
18 9.00 0.5
19 9.50 0.5
20 10.00 0.5
1 4
1 4
1 4
2 4
2 4
2 4
2 4.22
3 4.5
3 4.78
3 5.06
3 5.33
4 5.61
4 5.89
4 6.71
4 6.45
3 1.50 0.5
4 2.00 0.5
5 2.50 0.5
6 3.00 0.5
7 3.50 0.5
8 4.00 0.5
9 4.50 0.5
10 5.00 0.5
11 5.50 0.5
12 6.00 0.5
13 6.50 0.5
14 7.00 0.5
15 7.50 0.5
16 8.00 0.5
17 8.50 0.5
18 9.00 0.5
19 9.50 0.5
20 10.00 0.5
1 4
1 4
1 4.2
1 5.1
2 4.1
2 4.4
2 4.7
2 4.92
3 5.2
3 5.48
3 5.76
3 6.04
4 6.31
4 6.59
4 6.87
4 7.15
4 7.43
4 7.7
5 2.50 0.5
6 3.00 0.5
7 3.50 0.5
8 4.00 0.5
9 4.50 0.5
10 5.00 0.5
11 5.50 0.5
12 6.00 0.5
13 6.50 0.5
14 7.00 0.5
15 7.50 0.5
16 8.00 0.5
17 8.50 0.5
18 9.00 0.5
19 9.50 0.5
20 10.00 0.5
1 4
1 4
1 4
1 4
2 4
2 4.09
2 4.44
2 4.79
3 5.14
3 5.49
3 5.84
3 6.18
4 6.53
4 6.88
4 7.23
4 7.58
CliftonDenver
# of Wall Embedment
Units Height (ft) (ft)
# of Wall Embedment
Units Height (ft) (ft)
# of Wall Embedment
Units Height (ft) (ft)
# of Length
Rows (ft)
# of Length
Rows (ft)
# of Length
Rows (ft)
ø=26 deg. 110 pcf, No Surcharge, No Slope, Clay
4 2.67 0.5
5 3.33 0.5
6 4.00 0.5
7 4.67 0.5
8 5.33 0.5
9 6.00 0.5
10 6.67 0.5
11 7.33 0.5
12 8.00 0.5
13 8.67 0.5
14 9.33 0.5
15 10.00 0.5
1 4
1 4
1 4.8
2 4.2
2 4.63
2 5.19
3 5.56
3 6.12
3 6.59
4 7.05
4 7.52
4 7.98
ø=26 deg. 110 pcf, 250 psf Surcharge, No Slope, Clay
3 2.00 0.5
4 2.67 0.5
5 3.33 0.5
6 4.00 0.5
7 4.67 0.5
8 5.33 0.5
9 6.00 0.5
10 6.67 0.5
11 7.33 0.5
12 8.00 0.5
13 8.67 0.5
14 9.33 0.5
15 10.00 0.5
2 4.33
2 5.83
2 7.4
2 7.9
2 8.3
3 8.83
3 9.32
3 9.69
4 10.25
4 10.72
5 11.08
5 11.66
5 12.11
ø=26 deg. 110 pcf, No Surcharge, 21.8 deg. Slope, Clay
2 1.33 0.5
3 2.00 0.5
4 2.67 0.5
5 3.33 0.5
6 4.00 0.5
7 4.67 0.5
8 5.33 0.5
9 6.00 0.5
10 6.67 0.5
11 7.33 0.5
12 8.00 0.5
13 8.67 0.5
14 9.33 0.5
15 10.00 0.5
1 4
1 4
1 4
1 4.3
1 5.5
2 5.6
2 6.5
3 7.4
3 8.3
3 9.2
4 10.1
4 11.5
5 13
5 14.8
5 2.5 0.5
6 3.00 0.5
7 3.50 0.5
8 4.00 0.5
9 4.50 0.5
10 5.00 0.5
11 5.50 0.5
12 6.00 0.5
13 6.50 0.5
14 7.00 0.5
15 7.50 0.5
16 8.00 0.5
17 8.50 0.5
18 9.00 0.5
19 9.50 0.5
20 10.00 0.5
1 4
1 4
1 4
1 4.7
2 4
2 4.36
2 4.7
2 5.04
3 5.38
3 5.73
3 6.07
3 6.41
4 6.75
4 7.1
4 7.44
4 7.78
3 1.50 0.5
4 2.00 0.5
5 2.50 0.5
6 3.00 0.5
7 3.50 0.5
8 4.00 0.5
9 4.50 0.5
10 5.00 0.5
11 5.50 0.5
12 6.00 0.5
13 6.50 0.5
14 7.00 0.5
15 7.50 0.5
16 8.00 0.5
17 8.50 0.5
18 9.00 0.5
19 9.50 0.5
20 10.00 0.5
2 4
2 5.16
2 5.5
2 7.8
2 8.16
2 8.5
2 8.9
3 9.18
3 9.53
3 9.87
3 10.21
4 10.55
4 10.9
4 11.24
4 11.58
5 11.92
5 12.27
5 12.61
3 1.50 0.5
4 2.00 0.5
5 2.50 0.5
6 3.00 0.5
7 3.50 0.5
8 4.00 0.5
9 4.50 0.5
10 5.00 0.5
11 5.50 0.5
12 6.00 0.5
13 6.50 0.5
14 7.00 0.5
15 7.50 0.5
16 8.00 0.5
17 8.50 0.5
18 9.00 0.5
19 9.50 0.5
20 10.00 0.5
1 4
1 4
1 4
1 4
1 4.5
1 5.35
2 5.1
2 5.7
2 6.4
3 6.95
3 8.33
3 8.5
3 8.9
4 9.5
4 11.5
4 11.75
5 13.2
5 14.4
CliftonDenver
ESTIMATES FOR DRAIN PIPE, ADHESIVE AND GEOGRID