Trinity SRT Series User manual

ENERGY ABSORPTION SYSTEMS
SRT-350® 6 POST
Guardrail End
Treatment
Assembly Manual
Part No. 620295B Revised March 2010

2
"3-'6 "3-'6 "3-'6 "3-'6 "3-'6 "3-'6
FOR SPECIFIC DETAILS, REFER TO THE
STATE STANDARD DRAWING
SRTTM/ HBATM 6-POST SYSTEM

3
SRTTM / HBATM 6-POST SYSTEM
BILL OF MATERIAL ENGLISH (METRIC)
(FOR QUANTITIES, SEE STATES OPTION(S))
3G 12/12"/ BACKUP (2.67/0.305) GUARDRAIL
9G 12/12.5'/6'3"/S (2.67/3.81/1.905/S) GUARDRAIL
30G 12/12.5'/6'3"/S (2.67/3.81/1.905/S) SRT-1 ANC GUARDRAIL
39G 12/12.5'/6'3"/S (2.67/3.81/1.905/S) SR T-2 GUARDRAIL
700A CABLE ANCHOR BRACKET
907G 12 (2.67)/BUFFER/ROLLED (TERMINAL)
3000G CABLE ASSEMBLY 3/4" x 6'6" (19 x 1981)
3300G 5/8" (16) WASHER
3340G 5/8" (16) HGR NUT
3360G 5/8" DIA. x 1 1/4" (16 DIA x 35) HGR SPLICE BOLT
3380G 5/8" DIA. x 1 1/2" (16 DIA. x 38) HEX HEAD BOLT
3400G 5/8" DIA x 2" (16 DIA. x 50) POST BOLT
3580G 5/8" DIA x 18" (16 DIA x 460) HGR POST BOLT
3701G 3/4" (19) WASHER
3704G 3/4" (19) HEX NUT
3718G 3/4" DIA X 3 "(19 DIA.x 75) HIGH STRENGTH HEX HEAD
BOLT
3900G 1" (25) WASHER
3910G 1" (25) HEX NUT
4063B WOOD POST 6" x 8" x 6'0" (150 x 200 X 1830)
4075B WOODBLOCK 6" x 8" x 14" (150 x 200 x 360) DR
4254G 3/8" (10) WASHER
4258G 3/8" (10) LOCKWASHER
4261G 3/8" x 1 1/2" (10 DIA. x 38) HEX HEAD BOLT (GR 5)
4699G 3/4" (19) LOCKWASHER
6321G 3/8" DIA. X 2 " (10 DIA x 50) HEX HEAD BOLT (GR 5)
6405G 3/8" (10) HEX NUT
9960G SLOT GUARD
9961G 3/8" x 3" x 4" (10 x 75 x 100) PLATE WASHER
33876A HBA POST 1 TOP (W6 x 8.5)
33877A HBA POST 2 TOP (W6 x 8.5)
33878A HBA POST 1 & 2 BOT (TS 6 x 4)
33879G ANGLE STRUT 2" X 2" X 3/8" (50 x 50 x 10)
33880G 1" x 6" x 8" (25 x 150 x 200) BEARING PLATE
33881G CABLE WEB PL 4" x 1/4" x 5 3/4" (100 x 6 x 146)
DELINEATION OPTIONS
6665B 1 STRIPED (YELLOW/BLACK) REFLECTOR 16" x 16"
(400 x 400)
PC QTY DESCRIPTION
1
1
1
1
1
1
1
14
58
44
8
2
4
10
4
4
1
1
4
4
5
4
1
4
4
5
4
1
1
1
2
2
1
1

4
INSTALLING THE
SRTTM / HBATM 6-POST SYSTEM
MATERIALS
As packaged, the SRTTM/HBATM Post System includes all materials needed
for the installation.
Note that concrete footings or foundations are not required.
TOOLS REQUIRED
Tools required are those ordinarily used to install standard highway
guardrail (HGR). They include 9/16", 15/16", 1-1/4" and 1-1/2" sockets
and wrenches and such other equipment as augers and post pounders
commonly used in driving posts.
SITE PREPARATION
Site grading is usually necessary for the proper placement of the HBA
TM
posts and the Controlled Release Terminal (CRT) posts. It is suggested
that this grading be completed before the start of the installation of the
SRTTM/HBATM.
INSTALLATION
Be sure adequate time is allowed for "same day" complete installation.
If special field conditions are encountered when installing the
SRTTM/HBATM Post System, contact Trinity Engineering @ 1-800-644-7976
to review the conditions.
POST LAYOUT
The SRTTM/HBATM Post System is a 37'6" (11.43 m) that utilizes a straight
flare. Start at the end (post location 7) of the guardrail run and measure
along the flared system a distance of 37'6" (11.43 m). At this point,
measure an offset of 4'0" (1.21 m) perpendicular to the road. This
establishes the face location of post no. 1. A straight line between post
no. 1 and face of the blockout of post no. 7 establishes the location of
either the face of the post or the face of the blockout for each of the
posts. All posts are spaced at 6'3" (1905 mm) on center.
Trinity Highway Products drawings for the SRT should be used with
these instructions. The states standard drawings for this system need
to be reviewed for details that will be specific to that state.
The SRT™/HBA™ Post System has a straight flare; the earlier versions of
the SRT-350™ used a parabolic (curved) flare. At posts one and two,
HBA™ posts are used in place of the soil tubes and wood posts. The
same equipment and expertise is required for both systems. Anyone with
experience installing the SRT-350™ should have no difficulty installing the
SRT™/HBA™ Post System.

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INSTALLING THE CRT POSTS
Install the wood posts at locations 6 thru 3. These posts (PC-4063B)
may be driven. They may also be installed by drilling holes
approximately 44" (1120 mm) deep. Insert the 6'0" (1830 mm) wood
post into these holes and backfill. Note that in either case, the bottom
of the upper 3 1/2" (90 mm) hole in the post is approximately at
finished grade. Posts 3 thru 7 are spaced at 6'3"
(1905 mm) intervals.
FIGURE1
INSTALLING HBATM BOTTOM POSTS
There are two methods for the installing the HBA
TM bottom posts at
locations 1 and 2. The posts should be oriented so that the larger hole
(13/16" (21 mm)) is placed downstream (away from the end of the
system).
METHOD A Drive the HBA Bottom Posts (PC-33878A) with an
approved driving head to the appropriate depths, approximately
72"(1830 mm). The optimum depth will have the bottom of the
13/16" (21 mm) holes in the ears even with the finished grade.
METHOD B Drill a 12" (300 mm) pilot hole approximately 72" (1830
mm) deep and Install the HBA Bottom Posts to the appropriate depth.
The optimum depth will have the bottom of the 13/16" (21 mm) holes
in the ears even with the finished grade.
If METHOD Bis used, material should be placed in 6" (150 mm) lifts
and compacted with pneumatic equipment to optimum compaction.
INSTALLING HBATM POSTS
WHEN ENCOUNTERING ROCK
If rock is encountered when installing the HBA posts, use the
following procedures, unless there is a more restrictive state
specification.
If rock is encountered and 20" (510 mm) or less depth is required to
complete the installation of the bottom HBA post, drill a 12"-16" (300
mm - 400 mm) diameter hole in the rock. The hole should be drilled
2" (50 mm) deeper than required embedment depth. Place in the
bottom 2 inches (50 mm) of the hole for drainage granular material
See Figure 1.

6
or small pieces of the drilled rock. Backfill and compact the hole after
installing the HBA
TM post. If compactable, the material removed from the
hole may be used for the backfill.
If rock is encountered and more than 20" (510 mm) depth is required to
install the bottom HBA post, drill a 12"-16" (300 mm-400 mm) diameter
hole 22" inches (560 mm) deep into the rock. Install the HBApost in the
hole. Cut off the embedded portion so the guardrail will be installed at
the proper mounting height. Place in the bottom 2 inches (50 mm) of
the hole for drainage granular material or small pieces of the drilled rock.
Backfill and compact the hole after installing the HBA post. If
compactable, the material removed from the hole may be used for the
backfill.
If the finished grade is paved around terminal posts l and 2, a 3" deep
recess around each post needs to be provided to allow for the top post
to rotate when impacted. (See Figures 6 and 7). The recessesshould
not be filled with compacted asphalt or concrete.
INSTALLING HBATM TOP POSTS
Once the bottom posts are installed, the upper post can be installed.
The post plates (ears) can be installed on either side of the bottom post
plates (ears). At post location No. 1, install the upper post (PC-33876A)
by aligning the holes of the post plates (ears) of the upper and lower
posts. In the 7/16" (11 mm) holes, install a 3/8" (10 mm) diameter x 2"
(50 mm) hex head bolt with a 3/8" (10 mm) washer, 3/8" (10 mm) lock
washer under the 3/8" (10 mm) hex nut. See Figure 2.
The bolts should be installed so the head of the bolt is on the inside of
the post plates (ears) and the washer and lock washer under the nut are
on the outside of the post plates.
There is no torque requirement for these bolts. They should be
tightened to a snug position.
FIGURE 2

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At Post Location No. 2, install the upper post (PC-33877A) by aligning the
holes of the post plates (ears) on the upper and lower posts. In the 7/16"
(11 mm) holes, install a 3/8" (10 mm) diameter x 2" (50 mm) hex head
bolt with a 3/8" (10 mm) washer, 3/8" (10 mm) lock washer under the
3/8" (10 mm) hex nut. The bolts should be installed so the head of the
bolt is on the inside of the post plates (ears) and the washer and lock
washer under the nut are on the outside of the post plates (ears). See
Figure 3.
There is no torque requirement for these bolts. They should be
tightened to a snug position.
FIGURE 3
INSTALLING THE STRUT
Place the two angle struts (PC-33879G) between post 1 and 2. See
Figure 4.
In the 13/16" (21 mm) hole of Post No. 1 post plates, install a 3/4" x 3"
(19 mm x 75 mm) diameter hex head high strength bolt. The bolt is
placed through the strut and through the two post plates. A 3/4" (19 mm)
washer and a 3/4" (19 mm) lock washer are placed under the 3/4" (19
mm) hex nut.
In the 13/16" (21 mm) holes of Post No. 2 post plates, install a 3/4" x 3"
(19 mm x 75 mm) diameter hex head high strength bolt. The bolt is
placed through the strut and through the two post plates. A 3/4" (19 mm)
washer and 3/4" (19 mm) lock washer are placed under the 3/4" (19 mm)
hex nut. Two to three washers are stacked on the bolt between the strut
and the inside post plate to allow the strut to pass over the 3/8" (10 mm)
bolt head. See Figure 4.
There is no torque requirement for these bolts. They should be
tightened to a snug position.

8
FIGURE 4
INSTALLING WOOD BLOCKOUTS
AND RAIL PANEL
Guardrail panels (PC-30G and PC-39G and PC-69G) have two (2) sets of
slots. These slots should be between posts 1 and 2, 2 and 3, 3 and 4,
and 4 and 5. The guardrail panels should be installed so that the slot
guard attachment holes are at the end of the slots away from the end of
the terminal. See Figure 5.
FIGURE 5
The 12'6" (3.81 m) guardrail panel (PC-39G) or 25'0" (7.62 m) guardrail
panel (PC-69G) slots should be between posts 3 and 4 and posts 4 and
5.
The 12'6" (3.81 m) guardrail panel (PC-30G) anchor bracket holes will be
between post 1 and post 2.
12'6" (3 .81 m) PANEL OPTION:
At post location 7, splice and post bolt the 12'6" (3.81 m) rail panel
(PC-9G) to the run of guardrail with hardware provided by the standard
guardrail supplier.
The terminal rail should be lapped in the direction of traffic
unless the agency's policy dictates otherwise.
At post location 5, splice the 12'6" (3.81 m) rail panel to the 12'6"
(3.81 m) rail panel
Toward Post 1
Stack 2-3 washers on 3/4" bolt
Between post plate & strut to allow
strut to pass over 3/8" bolt head.
8

9
(PC-39G) with eight (8) 5/8" x 1 1/4" (16 mm x 32 mm) splice bolts and
hex nuts.
At post locations 4, 5, and 6, bolt the rail panel and wood blockout to
the wood post using a 5/8" x 18" (16 mm x 460 mm) post bolt, a hex
nut, and a round washer. The washer is installed between the wood post
and the nut.
At post location 3, splice the 12'6" (3.81 m) rail panel (PC-39G) to the
12'6" (3.81 m) rail panel (PC-30G) with eight (8) 5/8" x 1 1/4"(16 mm x
32 mm) splice bolts and hex nuts. Bolt the rail panels and wood blockout
to the wood post using a 5/8" x 18" (16 mm x 460 mm) post bolt, a hex
nut, and a round washer. The washer is installed between the wood post
and the nut.
At post locations 1 and 2, bolt rail panel to the wood posts using a
5/8" x 10" (16 mm x 255 mm) post bolt, a hex nut, and a round washer.
The washer is installed between the wood post and the nut.
The wood offset block should be secured to prevent it from
rotating . This can be done by toe nailing the block to the post or
the post to the block using 16d hot-dipped galvanized nails. The
nails should be installed approximately 3" (75mm) from the top
of the post or block, one on each side.
25'0" (7 .62 m) PANEL OPTION:
At post location 7, splice and post bolt the 25'0" (7.62 m) rail panel
(PC-69G) to the run of guardrail with hardware provided by the standard
guardrail supplier.
At post locations 4, 5, and 6, bolt the 25'0" (7.62 m) rail panel
(PC-69G) and wood blockouts to the wood posts using a 5/8" x 18"
(16 mm x 460 mm) post bolt, a hex nut, and a round washer. The washer
is installed between the wood post and the nut.
At post location 3, splice the 25'0" (7.62 m) rail panel (PC-69G) to the
12'6" (3.81 m) rail panel (PC-30G) with eight 8 5/8" x 1 1/4"(16 mm x 32
mm) splice bolts and hex nuts. Bolt the rail panels and wood blockout to
the wood post using a 5/8" x 18" (16 mm x 460 mm) post bolt, a hex
nut, and a round washer. The washer is installed between the wood post
and the nut.
At post location 2, bolt the backup rail panel (PC-3G) to the HBA Top
Post using a 5/8" x 2" (16 mm x 50 mm) post bolt, a hex nut, and a round
washer. The washer is installed between the post and the nut. Do not
attach the rail to the post.
At post location 1, bolt the rail panel to the HBA Top Post using a
5/8" x 2" (16 mm x 50 mm) post bolt, a hex nut, and a round washer.
The washer is installed between the post and the nut.
The wood offset block should be secured to prevent it from rotating. This
can be done by toe nailing the block to the post or the post to the block
using 16d hot-dipped galvanized nails. The nails should be installed
approximately 3" (75mm) from the top of the post or block, one on each
side.