www.highwayguardrail.com 14 Revised: October 5, 2009
WARNING: Ensure that the proper Leaveout (specified area of
open space in the pavement) around the posts is reserved and
filled with state/specifying agency approved backfill material that
will not prevent movement, for any posts installed in rigid
pavement such as any thickness of concrete or asphalt. Failure to
follow this warning could result in serious injury or death in the
event of a collision.
FOR NON-PERMEABLE SOIL
Step Actions
1.
Select Option A, Option B, or Option C below, if soil is non-
permeable.
For 6’ Tube Only
1. Drill a 12” (300 mm) maximum diameter pilot
hole approximately 75” (1905 mm) deep.
2. Insert the tube into the hole to the optimum
depth, where the top of the tube is 2
5
/
8
” (67 mm)
above the finished grade.
For 4’ 6” Tube with Soil Plate
1. Drill a 12” (300 mm) maximum diameter pilot
hole approximately 57” (1450 mm) deep.
2. Insert the soil plate/tube assembly into the hole
by impact or vibratory means with an
appropriate driving head.
3. Insert the tube to the optimum depth of where
the top of the tube is 2
5
/
8
" (67 mm) of the above
the finished grade.
Option
A
For 4’ 6” Tube without Soil Plate
1. Drill a 12” (300 mm) maximum diameter pilot
hole approximately 57” (1450 mm) deep.
2. Insert the tube into the hole to the optimum
depth, where the top of the tube is 2
5
/
8
” (67 mm)
above the finished grade.
Option
B
For 4’ 6” Tube with Soil Plate
Cut slots for the soil plates out by hand or by using a
rock bar and then follow all of the steps of Option A
for 4’ 6” tube with soil plate, above.
Option
C
For 4’ 6” Tube with Soil Plate
Drill three adjacent 12” (300 mm) maximum
diameter holes or one 24” (610 mm) maximum
diameter hole to accommodate the soil plate/tube
assembly and then follow all of the steps of Option A
for 4’ 6” tube with soil plate, above.
Note: Take extra care to prevent settlement or lateral
displacement of the tubes, to ensure the posts attach to the
Guardrail, correctly.
WARNING: Ensure that the proper Leaveout (specified
area of open space in the pavement) around the posts is
reserved and filled with state/specifying agency
approved backfill material that will not prevent
movement, for any posts installed in rigid pavement
such as any thickness of concrete or asphalt. Failure to
follow this warning could result in serious injury or death
in the event of a collision.
2.
Backfill the hole with compactable materials in 6" (150 mm) lifts
and compact with pneumatic equipment to optimum compaction.
3.
Ensure that the finished Guardrail height will be approximately
27
3
/
4
" (706 mm) above the finished grade, or as the
state/specifying agency plans indicate.
4.
Ensure that the tubes do not project more than 4" (100 mm)
above the finished grade.
Revised: March 2010
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