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Section 4: Concrete Railing

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Traffic Railing Type T221

Description

This railing is a 32-inch high concrete parapet. Its parapet is taller and thicker than that of the T201 railing from which its design is derived allowing optional use of welded wire reinforcement. Its minimum height after maintenance overlays is 30 inches.



The T221 railing has been evaluated and approved for TL-4 (NCHRP 350) use.

Type T221 Rail (click in image to see full-size image)

Figure 2-15. Type T221 Rail

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Traffic Railing Type T223

Description

This railing is 32 inches high with a continuous concrete top beam 19 inches high by 15.5 inches wide on 13-inch high concrete posts that are 4 ft. long and spaced a maximum of 10 ft. apart. This railing is not recommended for direct connectors or flyovers. Its minimum height after maintenance overlays is 30 inches.



The T223 railing has been evaluated and approved for TL-4 (NCHRP 350) use.

T223 Rail (click in image to see full-size image) Anchor: #i1000744grtop

Figure 2-16. T223 Rail

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Traffic Railing Type T411

Description

This railing is a 32-inch high continuous concrete railing that has 6-inch wide windows spaced every 18 inches, center to center. Its minimum height after maintenance overlays is 30 inches.



The T411 railing has been evaluated and approved for TL-2 (NCHRP 350) use. It cannot be used for bridges with design speeds over 45 mph.

Type T411 Rail (click in image to see full-size image) Anchor: #i1000870grtop

Figure 2-17. Type T411 Rail

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Traffic Railing Type T551

Description

This railing is a 32-inch high concrete F-shaped parapet. Its minimum height after maintenance overlays is 29 inches.



This rail has been evaluated and approved for TL-4 (NCHRP 350) use.

Type T551 Rail (click in image to see full-size image)

Figure 2-18. Type T551 Rail

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Traffic Railing Type T552

Description

This railing is a 32-inch high concrete F-shaped parapet with multiple drain slots. Its minimum height after maintenance overlays is 29 inches.



The T552 railing has been evaluated and approved for TL-4 (NCHRP 350) use.

Type T552 Rail (click in image to see full-size image)

Figure 2-19. Type T552 Rail

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Traffic Railing Type T66

Description

This railing is a 32-inch high concrete post and beam rail. It has a 9 inch tall concrete curb with concrete posts spaced at 6.5 feet maximum. The concrete rail is 12 inches deep and 12 inches wide. Its minimum height after maintenance overlays is 30 inches.



The T66 railing has been evaluated and approved for TL-3 (NCHRP 350) use. It is derived from the successfully crash-tested California Type 80 rail.

Type T66 Rail (click in image to see full-size image)

Figure 2-20. Type T66 Rail

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Traffic Railing Type SSTR

Description

This railing is 36 inches high with a concrete parapet that has a single front slope. Its minimum height after maintenance overlays is 32 inches.



The SSTR railing has been crash-tested to MASH TL-4 requirements and is approved for TL-4 use.

Type SSTR Rail (click in image to see full-size image)

Figure 2-21. Type SSTR Rail

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Traffic Railing Type T80SS

Description

This railing is 42 inches high with a concrete parapet that has a single front slope. Its minimum height after maintenance overlays is 42 inches. Non-standard slab details are required for this rail.



The T80SS railing has been evaluated and approved for TL-5 (NCHRP 350) use.

Type T80SS Rail (click in image to see full-size image)

Figure 2-22. Type T80SS Rail

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Traffic Railing Type C411

Description

This railing is a 42-inch high continuous concrete railing that has 6-inch wide windows spaced every 18 inches, center to center. Its minimum height after maintenance overlays is 42 inches.



The C411 railing has been evaluated and approved for TL-2 (NCHRP 350) use. It cannot be used for bridges with design speeds over 45 mph.

Type C411 Rail (click in image to see full-size image)

Figure 2-23. Type C411 Rail

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Traffic Railing Type C412

Description

This railing is a 42-inch high continuous concrete railing that has 6-inch wide windows spaced every 18 inches, center to center. Its minimum height after maintenance overlays is 42 inches.



The C412 railing has been successfully crash-tested and approved for TL-4 (NCHRP 350) use.

Type C412 Rail (click in image to see full-size image)

Figure 2-24. Type C412 Rail

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Traffic Railing Type T80TT

Description

This railing is a 90-inch high continuous concrete railing with a 42 inch tall single slope base topped with a 48 inch tall wall and rail. Non-standard slab details are required for this rail. Its minimum height after maintenance overlays is 90 inches.



The T80TT railing has been evaluated and approved for TL-6 (NCHRP 350) use. It is derived from the Type TT rail, which was successfully crash-tested to TL-6 criteria. This rail is not issued as a TxDOT standard rail type.

Type T80TT Rail (click in image to see full-size image)

Figure 2-25. Type T80TT Rail


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