TrinityHighway.com
February 2022
MATT™ Assembly/Repair Checklist
(File with Project/Maintenance Records)
Performed by:
Date:
Location:
□
1.
Ensure proper site grading complies with state/specifying agency guidelines and/or AASHTO Roadside Design Guide,
whichever is more stringent. (p 8)
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2. Ensure required traffic control is in place to conduct MATT™ assembly. (p 5)
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3. Ensure only Trinity Highway provided MATT™ parts are used for the assembly of the MATT™ and that all parts are free
of damage. (p 5)
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4. Under NO circumstances shall the rail within the MATT™ be curved between Post 1 and Post 6. Ensure all MATT™ post
spacings are 6’-3” [1.905 m] on center (p 8)
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5. Ensure the soil around all posts is properly compacted and posts are free to rotate. When leave outs are necessary, use
only state/specifying agency approved backfill material within the leave out area. (p 9)
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6. Ensure the Strut Hole of the MATT™ CR Post 1 Bottom with Soil Plate is
upstream
and the Post is 4” [100 mm] (+1”, -
0”) [+25 mm, -0 mm] above the finished grade. (pp 17, 21-22).
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7. Ensure Soil Plates are installed on the
downstream
side of Posts 1-6. (pp 17-20)
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8. Ensure the center of the SYTP
®
yielding holes at Posts 2-5 are approximately centered at finished grade. (pp 18-19)
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9. Ensure the MATT™ Strut Adapter Plate (at Post 2) and Strut are installed between Post 1 and 2 on the post side
OPPOSITE the closest traffic, when assembled in a Median or Roadside application. When assembled in a Gore
application, it is acceptable to place them on either side of the post(s). Ensure the toe of the Strut’s vertical leg is pointed
down. (p 21)
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10. Ensure the
downstream
slotted holes in the MATT™ Double Spacer is bolted to the
downstream
hole of the MATT™
CR Post 1 Top and the MATT™ SYTP
®
(Post 2). (p 23)
□
11. Ensure the
upstream
slotted hole in the MATT™ Spacer (Posts 3-5) is bolted to the MATT™ SYTP
®
with Soil Plate using
the
upstream
hole in the post. (p 24)
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12. Ensure all MATT™ Guardrails are installed 31” [787 mm] (+1”, -0”) [+25 mm, -0 mm] from finished grade. (pp various)
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13. Ensure all MATT™ 12 Gauge Transition Guardrails With Fin-4, at post location 6, are
lapped in the direction
of the
nearest adjacent traffic and fins are positioned upstream. (p 25)
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14. Ensure the MATT™ 12 Gauge, Slotted Intermediate Guardrails With Fin-3 are
lapped to the outside
of the MATT™ 12
Gauge Transition Guardrails with Fin-4. (p 26)
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15. Ensure the MATT™ 12 Gauge, Slotted Intermediate Guardrails With Fin-3 are
lapped to the outside
of the MATT™ 12
Gauge, Slotted Intermediate Guardrails With Fin-3. (p 27)
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16. Ensure the MATT™ 12 Gauge, Slotted Intermediate Guardrails-2 are
lapped to the outside
of the MATT™ 12 Gauge,
Slotted Intermediate Guardrails With Fin-3. (p 28)
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17. Ensure the MATT™ 10 Gauge, Slotted Front Guardrails-1 are
lapped to the outside
of the MATT™ 12 Gauge, Slotted
Intermediate Guardrails-2. (p 29)
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18. Ensure the MATT™ 10 Gauge Head Rails are
lapped to the outside
of the MATT™ 10 Gauge Slotted Front Guardrails-
1. (p 31)
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19. Ensure the MATT™ Backing Plate is
assembled on the outside
of the MATT™ Guardrail Panels at Posts
2, 3, 4 and 5. (pp 26-29)
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20. Ensure the 5/8” heavy flat washers (1/4” thick) are placed between the nut and spacers at Posts 1-5. (pp 26-29)
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21. Ensure the MATT™ Head Tube is attached to the MATT™ Impact Head and it is up against the MATT™ CR Post 1 Top.
(pp 33-34)
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22. Ensure all MATT™ fasteners identified in Step 16 are
torqued to 65 ft-lb [88 Nm], (+/- 3 ft-lb) [+/- 4 Nm]
. (p 35)
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23. Ensure all MATT™ fasteners that are NOT required to be torqued are tightened to a snug position with a minimum of
two (2) bolt threads protruding beyond the nut. (Various pp)
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24. Ensure the Cable Anchor Bracket Angle is hooked over the MATT™ CR Post 1 Top and the cable is taut. (pp 30-35)
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25. Ensure delineation is placed on the MATT™ Impact Head per MUTCD and/ or state/specifying agency. (p 32)
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26. Ensure any steel delineator posts are a minimum of 3’-0” [1 m] upstream from the MATT™ Impact Head. (p 32)
Summary of Contents for MATT
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