17
Z886 PERMA-TRENCH
INSTALLATION INSTRUCTIONS
Z886 Internal Sidewall
Extension Bracing
INSTALLATION WITH SIDEWALL EXTENSIONS
Use reinforcing every 10" [254] per bracing schedule
(bracing provided by others).
Standard 2 x 4’s
[51 x 102]
Height
Determined
By Invert
10"
[2
54
]
TY
P
Height
Determined
by Invert
Standard 2 x 4’s
[51 x 102]