14
Z886 PERMA-TRENCH
INSTALLATION INSTRUCTIONS
Z886
Setting the Trench
NEW CONSTRUCTION
Typically, a trench system is assembled from the outlet back.
Starting with the deepest section or catch basin, set the first
channel utilizing the integral rebar clip anchoring system.
Rebar clips are on both sides of each trench drain for easy
attachment to No. 4 rebar stakes. Slide the rebar into the
rebar clips. Then drive the stakes into the ground for positive
anchoring. Secure the trench to the rebar stakes with the
hardware provided with bag No. 841.
Adjust the trench to the desired elevation and repeat the
process with the next channel.
Set trench on rebar 1" [25] above final grade — this allows
final elevation adjustment with a hammer prior to pouring
concrete.
It is recommended to pour concrete the same day the trench
is set.
Recess trench 1/8" [3] below finish grade to ensure positive
flow into trench grate.
