Installation Instructions

INSTALLATION
35
INSTALLATION
800.992.1725 | www.prinsco.com
TABLE&4.&BACKFILL&PLACEMENT&AND&COMPACTION&
Class&IA Class&IB Class&II Class&III Class&IV
General'
Recommendations'
and'Restrictions
Suitable+for+use+as+a+
drainage+blanket+and+
underdrain+in+rock+cuts+
where+adjacent+material+is+
suitably+graded.++Should+not+
be+used+where+conditions+
TH`JH\ZLTPNYH[PVUVMÄULZ
from+adjacent+soil+and+loss+of+
pipe+support.
Process+materials+as+
required+to+obtain+gradation+
which+will+minimize+
migration+of+adjacent+
materials.+Suitable+for+use+
as+drainage+blanket+and+
underdrain.
Where+hydraulic+gradient+
exists+check+gradation+to+
minimize+migration.+“Clean’’+
groups+suitable+for+use+
as+drainage+blanket+and+
underdrain.
Should+not+be+used+where+
water+conditions+in+trench+may+
cause+instability.
Not+++++++++++++
Recommended
Foundation
Suitable+as+foundation+and+
for+replacing+over-excavated+
and+unstable+trench+bottom+
as+cautioned+above.+Install+
and+compact+in+6-in.+
maximum+layers.
Suitable+as+foundation+and+
for+replacing+over-excavated+
and+unstable+trench+bottom.+
Install+and+compact+in+6-in.+
maximum+layers.
Suitable+as+a+foundation+and+
for+replacing+over-excavated+
and+unstable+trench+bottom+
as+restricted+above.+Install+
and+compact+in+6-in.+
maximum+layers.
Suitable+as+foundation+and+
for+replacing+over-excavated+
trench+bottom+as+restricted+
above.+Should+not+be+used+in+
thicknesses+greater+than+12+in.+
total.+Install+and+compact+in+
6-in.+maximum+layers.
Not+
Recommended
Bedding
Install+in+6-in.+maximum+
SH`LYZ3L]LSÄUHSNYHKLI`
hand.+Minimum+depth+4+in.+(6+
in.+in+rock+cuts).++
Install+and+compact+in+6-+in.+
TH_PT\TSH`LYZ3L]LSÄUHS
grade+by+hand.+Minimum+
depth+4+in.+(6+in.+in+rock+
cuts).
Install+and+compact+in+6-in.+
TH_PT\TSH`LYZ3L]LSÄUHS
grade+by+hand.+Minimum+
depth+4+in.+(6+in.+in+rock+
cuts).
Suitable+only+in+dry+trench+
conditions.+Install+and+
compact+in+6-in.+maximum+
SH`LYZ3L]LSÄUHSNYHKLI`
hand.+Minimum+depth+4+in.+(6+
in.+in+rock+cuts).
Not+
Recommended
Haunching
Install+in+6-in.+maximum+
layers.+Work+in+around+pipe+
by+hand+to+provide+uniform+
support.
Install+and+compact+in+6-in.+
maximum+layers.+Work+in+
around+pipe+by+hand+to+
provide+uniform+support.
Install+and+compact+in+6-in.+
maximum+layers.+Work+in+
around+pipe+by+hand+to+
provide+uniform+support.
Install+and+compact+in+6-in.+
maximum+layers.+Work+in+
around+pipe+by+hand+to+
provide+uniform+support.
Not+
Recommended
0UP[PHS)HJRÄSS
Install+to+a+minimum+of+6+in.+
above+pipe+crown.
Install+and+compact+to+a+
minimum+of+6+in.+above+pipe+
crown.
Install+and+compact+to+a+
minimum+of+6+in.+above+pipe+
crown.
Install+and+compact+to+a+
minimum+of+6+in.+above+pipe+
crown.
Not+
Recommended
Embedment'
Compaction
Place+and+work+by+hand+to+
insure+all+excavated+voids+
HUKOH\UJOHYLHZHYLÄSSLK
For+high+densities+use+
vibratory+compactors.
Minimum+density+85+%+
Standard+Proctor.+Use+
hand+tampers+or+vibratory+
compactors.
Minimum+density+85+%+
Standard+Proctor.+Use+
hand+tampers+or+vibratory+
compactors.
Minimum+density+90+%+
Standard+Proctor.+Use+
hand+tampers+or+vibratory+
compactors.+Maintain+
moisture+content+near+
optimum+to+minimize+
compaction+effort.
Not+
Recommended
-PUHS)HJRÄSS
Compact+as+required+
by+the+Engineer.
Compact+as+required+
by+the+Engineer.
Compact+as+required+
by+the+Engineer.
Compact+as+required+
by+the+Engineer.
Not+
Recommended