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COVID-19 INFORMATION

Safety Design and Guardrails

Revised: Noverber 9, 2021
CLEAR ZONE AND SAFETY PLANS
DRAWING RELATED IB REVISION DATE DESCRIPTION
  06/28/2019
CLEAR ZONE CRITERIA
   
SAFETY PLAN AT ROADSIDE HAZARDS
  05/31/2018
SAFETY PLAN AT SIDEROADS OR PRIVATE DRIVES
IB 21-13 06/15/2021
SAFETY PLAN MINIMUM INSTALLATION AT BRIDGE ENDS
  06/28/2019
SAFETY PLAN FOR BRIDGE PIERS IN CLEAR ZONE
  06/28/2019
SAFETY PLAN FOR BRIDGE ENDS IN MEDIANS
IB 21-13 06/15/2021
SAFETY PLAN SAFETY HARDWARE PLACEMENT ON OUTSIDE EDGE
  06/28/2019
SAFETY PLAN SAFETY HARDWARE PLACEMENT IN MEDIAN
       

CABLE BARRIER
DRAWING RELATED IB REVISION DATE DESCRIPTION
IB 21-20 10/29/2021
CABLE BARRIER PLACEMENT
S-CB-2 IB 21-13   HIGH TENSION CABLE BARRIER
S-CB-3 IB 21-13   CABLE BARRIER ANCHOR DETAILS
S-CB-3A IB 21-13   CABLE BARRIER ANCHOR BRACKET DETAILS
S-CB-4 IB 21-13   CABLE BARRIER ANCHOR POST #2 DETAILS
S-CB-5 IB 21-13   CABLE BARRIER LINE POST DETAILS
       

CRASH CUSHIONS
DRAWING RELATED IB REVISION DATE DESCRIPTION
IB 21-20
10/29/2021
CRASH CUSHION
  06/28/2019
CRASH CUSHION (GATING) BARREL ARRAY
       

 GUARDRAIL DETAILS
DRAWING RELATED IB REVISION DATE DESCRIPTION
IB 21-13
06/15/2021
GUARDRAIL DETAILS
  06/28/2019
GUARDRAIL AND BLOCK-OUT DETAILS
S-GR31-1B
    GUARDRAIL FASTENING HARDWARE
S-GR31-1C IB 21-13 06/15/2021 GUARDRAIL GENERAL NOTES AND POST DETAILS
S-GR31-1D IB 21-20   GUARDRAIL POST PLACEMENT IN ROCK
       

GUARDRAIL CONNECTIONS
DRAWING RELATED IB REVISION DATE DESCRIPTION
S-GRC-4 IB 21-13 06/15/2021 GUARDRAIL CONNECTION TO BRIDGE RAILING CONCRETE PARAPET
S-GRC-5
  02/28/2020 GUARDRAIL CONNECTION TO BRIDGE ENDS (TRAILING ENDS)
S-GRC-6 IB 21-13 06/15/2021 GUARDRAIL CONNECTION TO BRIDGE ENDS FOR LOW SPEED ROADWAYS
       

GUARDRAIL (SPECIAL CASES)
DRAWING RELATED IB REVISION DATE DESCRIPTION
S-CPW-1
    CURVED PARAPET WALL ≤ 40 M.P.H.
IB 21-13
06/15/2021
SPECIAL CASE LONG SPAN GUARDRAIL 1 POST, 2 OR 3
POSTS OMITTED
IB 21-13
06/15/2021
SPECIAL CASE GUARDRAIL ATTACHMENT TO CONCRETE DECKS
 
06/28/2019
SPECIAL CASE GUARDRAIL FOOTING
 
06/28/2019
SPECIAL CASE GUARDRAIL HEIGHT TRANSITION DETAIL
S-GRS-5     SPECIAL CASE WEAK-POST GUARDRAIL ATTACHMENT TO CULVERT
S-GRS-5A IB 21-13 06/15/2021 WEAK-POST GUARDRAIL ASSEMBLY DETAILS FOR TYPE 1 & 2
S-GRS-5B       WEAK-POST GUARDRAIL ASSEMBLY DETAILS FOR TYPE 3 & 4
       

GUARDRAIL TERMINALS
DRAWING RELATED IB REVISION DATE DESCRIPTION
IB 21-20
10/29/2021
TYPE 12 GUARDRAIL TERMINAL BURIED-IN-BACKSLOPE
S-GRT-1A IB 21-20   LAYOUT OF FLARED GUARDRAIL (TL- 3)
S-GRT-1B IB 21-20   LAYOUT OF FLARED GUARDRAIL (TL- 2)
 
06/28/2019
TYPE 38 GUARDRAIL END TERMINAL
 
10/16/2020
EARTH PAD FOR TYPE 38 AND TYPE 21 TERMINAL
 
06/28/2019
EARTH PAD FOR TYPE 38 AND TYPE 21 TERMINALS (RETROFIT)
 
06/28/2019
TYPE 21 GUARDRAIL END TERMINAL
       

GUARDRAIL ANCHORS
DRAWING RELATED IB REVISION DATE DESCRIPTION
 
06/28/2019
TYPE 12 GUARDRAIL ANCHOR
  06/28/2019
GUARDRAIL ANCHOR FOR TYPE 12 TERMINAL (ALTERNATIVE)
IB 21-13 06/15/2021
TYPE 13 GUARDRAIL ANCHOR
  06/28/2019
IN-LINE GUARDRAIL ANCHOR
  06/28/2019
FLARED GUARDRAIL ANCHOR
       

CONCRETE MEDIAN BARRIERS
DRAWING RELATED IB REVISION DATE DESCRIPTION
IB 21-20
10/29/2021
32” SINGLE SLOPE CONCRETE BARRIER WALL
S-SSMB-1A IB 21-20 10/29/2021 36" SINGLE SLOPE CONCRETE BARRIER WALL
IB 21-20 10/29/2021
51” SINGLE SLOPE CONCRETE BARRIER WALL
IB 21-20 10/29/2021
51” HALF SIZE SINGLE SLOPE CONCRETE BARRIER WALL
  07/17/2020
FLARED SINGLE SLOPE CONCRETE MEDIAN BARRIER WALL (VERTICAL BACK)
  05/01/2020
SINGLE SLOPE MEDIAN BARRIER WALL CATCH BASIN DETAIL
 
06/28/2019
32" CONCRETE SINGLE SLOPE BARRIER WALL WITH SINGLE GUARDRAIL ATTACHMENT
S-SSMB-6A
    36” CONCRETE SINGLE SLOPE BARRIER WALL FOR ATTACHING GUARDRAIL
S-SSMB-6B       DUAL GUARDRAIL ATTACHMENT TO SINGLE SLOPE 36” BARRIER WALL
S-SSMB-6C       SINGLE GUARDRAIL ATTACHMENT TO SINGLE SLOPE 36” BARRIER WALL
S-SSMB-6D       51” CONCRETE SINGLE SLOPE BARRIER WALL FOR ATTACHING GUARDRAIL
S-SSMB-6E       DUAL GUARDRAIL ATTACHMENT TO SINGLE SLOPE 51” BARRIER WALL
S-SSMB-6F       SINGLE GUARDRAIL ATTACHMENT TO SINGLE SLOPE 51” BARRIER WALL
  05/01/2020
FOOTING DETAILS FOR OVERHEAD SIGN STRUCTURE 32” MEDIAN BARRIER WALL
  05/01/2020
FOOTING DETAILS FOR OVERHEAD SIGN STRUCTURE 51” MEDIAN BARRIER WALL
IB 21-20 10/29/2021
SINGLE SLOPE BARRIER WALL FOR GRADE SEPARATED MEDIAN
       

GUARDRAIL MAINTENANCE
DRAWING RELATED IB REVISION DATE DESCRIPTION
IB 21-13 06/15/2021 W-BEAM & THRIE BEAM BARRIER RAIL AND RUB RAIL DETAILS
S-GR28-2M
  06/28/2019
GUARDRAIL HARDWARE DETAILS
S-GR28-3M
  06/28/2019
GUARDRAIL HEIGHT ADJUSTMENT
  06/28/2019
GUARDRAIL TERMINAL ANCHOR TYPE 13
S-GR28-5M
  06/28/2019
MEDIAN DIVIDER GUARDRAIL
S-GR28-6M IB 21-20 10/29/2021
GUARDRAIL ATTACHMENT TO CONCRETE DECKS
S-GR28-7M
  06/28/2019
GUARDRAIL ATTACHMENT TO BRIDGE END DETAILS
S-GRC-1M     GUARDRAIL CONNECTION TO BRIDGE ENDS OR BARRIER WALL
S-GRC-2M     GUARDRAIL CONNECTION TO BRIDGE END FOR LOCAL ROADS (ADT < 2000)
S-GRC-3M     MEDIAN DIVIDER GUARDRAIL TRANSITION TO CONCRETE MEDIAN BARRIER
S-SSMB-6M     GUARDRAIL ATTACHMENT TO EXISTING SINGLE SLOPE CONCRETE BARRIER WALL

If you find any mistakes, missing information or have a question, contact:
TDOT CADD Support
1200 James K. Polk Building
Nashville, TN 37243-1402
TDOT.CADDSupport@tn.gov

This Page Last Updated: November 9, 2021 at 11:05 AM