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EXERCISE DESCRIPTION
To complete this exercise install wall drainage behind the
segment of wall constructed for Exercise 22, 23, or 24 or
for a project.
EXERCISE SETUP
Review safety concerns with students before beginning
GRADING SCALE
Grading for installing a drainage system behind wall
material should include the following scaled criteria:
Pt
Value Criteria Levels
2 Tile location Directly behind wall first
in wall
Tile free outs at elevation above
wall low point
2 Tile Open end of tile covered
coverage Open end of tile uncovered
Exercise 25
Retaining Wall
Drainage
32
3555X_01_ch01-40_p001-048.indd 32 14/06/10 7:48 PM
