www.highwayguardrail.com 16 Revised: October 5, 2009
4. Install the tube/post into the hole. Backfill the
hole with compactable materials in 6" (150 mm)
lifts and compact with pneumatic equipment to
optimum compaction.
Note: If compactable, the material removed from
the hole may be used for the backfill.
Option
B
If rock is encountered with depth greater than
20" (510 mm)
1. Drill a 12" - 16" (300 mm - 400 mm) diameter
hole 22" (560 mm) deep into the rock.
2. Cut off the embedded portion of the tube/post so
the Guardrail will be installed at the proper
mounting height.
3. Place granular material or small pieces of the
drilled rock in the bottom 2" (50 mm) of the hole
for drainage.
4. Install the tube/post in the hole. Backfill the hole
with compactable materials in 6" (150 mm) lifts
and compact with pneumatic equipment to
optimum compaction.
Note: If compactable, the material removed from
the hole may be used for the backfill.
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.
INSTALLING WOOD POSTS IN TUBES
Complete the following steps to install wood posts in tubes:
Step Actions
1.
Insert Pipe Sleeve (PN-705G) in post (PN-4147B) and install the
wood post in the steel tube at location 1.
2.
Install wood post(s) (PN-4147B) in tubes at locations required
for the systems, as dictated by the state/specifying agency.
3.
Insert a
5
/
8
” x 9
1
/
2
” (16 mm x 240 mm) Hex Head Bolt (PN-
3497G) through the foundation tube and the wood post at all
locations EXCEPT locations 1 and 2.
Note: The bolt must be installed from the embankment side, to
aid in possible post replacement.
4.
Place a
5
/
8
” (16 mm) HGR Nut (PN-3340G) on the end of the
inserted bolt.
5.
Tighten the nuts to a snug position.
Note: Do not over tighten the bolts and deform the tubes, this
will complicate post replacement.
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.
INSTALLING HBA™ TOP POSTS
Complete the following steps to install the HBA™ Top Posts, after the
Bottom Posts have been installed:
AT POST 1
Step Actions
1.
Install the Top Post (PN-33871A) at Post 1, by aligning the
holes of the post plates (ears) on the Top and Bottom Posts.
Note: The Top Post’s post plates (ears) can be installed on
either side of the Bottom Post’s post plates (ears).
2.
Insert a
3
/
8
” (10 mm) diameter x 2” (50 mm) Hex Head High
Strength Bolt (PN-6321G) through the
7
/
16
” (11 mm) holes of the
Revised: March 2010
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