F
F
G
G
F
F
E
G
E
G
G
F
E
G
E
A
B
C
D
E
F
G
H
I
12 –
TANDEM
®
SYSTEM
BUILDING A RETAINING WALL
TYPICAL CROSS-SECTION AND INSTALLATION
PATTERN – ESPLANADE TANDEM WALL
A Esplanade chiseled capping unit
60 mm × 381 mm × 1 067 mm
(2 3/8" × 15" × 42")
B Structural units
180 mm × 155 mm × variable (335, 402, 469 mm)
7 1/16" × 6 1/8" × variable (13 3/16", 15 13/16", 18 1/2")
C Veneer units
180 mm × 60 mm × variable (350, 495, 562 mm)
7 1/16" × 2 5/8" × variable (13 3/4", 19 1/2", 22 1/8")
D 20 mm (3/4") clean stone
E Geotextile membrane
F 100 mm (4") perforated drain connected to drains
G Starter unit 90 × 200 × 400 mm (3 9/16" × 7 7/8" × 15 3/4")
H 0-20 mm (0-3/4") compacted granular base, min . 300 mm (12")
I Minimum buried depth 150 mm (6")
INSTALLATION PATTERN
LINEAR PATTERN WITH ESPLANADE
TANDEM 180 UNITS ONLY
E
E
G
F
G
F
562 mm
(22 1/8")
495 mm
(19 1/2")
350 mm
(13 3/4")
0° or 9°
900 mm
(36") max