Bridge Railing Manual: Metal and Concrete Railing

Section 3: Metal and Concrete Railing

Traffic Railing Type T1F

Anchor: #DPIJQYNT
Classification	Traffic
Description	9-inch concrete parapet with two aluminum half-ellipse rails centered at 18 inches and 30.75 inches above the roadway surface. The rails are supported by steel posts spaced a maximum of 8 ft. apart.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-3.
Nominal height	33 inches
Minimum height after maintenance overlays	31 inches

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Figure A-4. Type T1F Railing

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Traffic Railing Type T1P

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Classification	Traffic
Description	9-inch concrete parapet with a round steel-top tube, two rectangular steel tubes, and a picket panel mounted on the back side of railing. The rails are supported by twin steel posts spaced a maximum of 8 ft. apart.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-3.
Nominal height	36 inches
Minimum height after maintenance overlays	34 inches
Special notes	This railing is not issued as a TxDOT standard railing type.

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Figure A-5. Type T1P Railing

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Traffic Railing Type T2P

Anchor: #i1160316
Classification	Traffic
Description	9-inch concrete parapet with a round steel-top tube, and two rectangular steel tubes. The rails are supported by twin steel posts spaced a maximum of 8 ft. apart.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-4.
Nominal height	44 inches
Minimum height after maintenance overlays	42 inches

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Figure A-6. Type T2P Railing

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Traffic Railing Type T1W

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Classification	Traffic
Description	9-inch concrete parapet and with two steel rectangular tube rails centered at 19 inches and 31 inches above the roadway surface. The rails are supported by twin steel posts spaced a maximum of 9 ft. apart.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-3.
Nominal height	32 inches
Minimum height after maintenance overlays	30 inches

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Figure A-7. Type T1W Railing

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Traffic Railing Type T402

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Classification	Traffic
Description	24-inch concrete parapet and a steel ellipse or rectangular HSS 18 inches above the concrete. It has twin steel posts spaced a maximum of 10 ft. apart. It features a bolt anchorage system for the steel rail posts that may be drilled and epoxy-anchored, allowing slip-forming of the concrete parapet. Its parapet is thicker than that of the C4(S) railing, from which its design is derived.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-4.
Nominal height	42 inches
Minimum height after maintenance overlays	40 inches

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Figure A-8. Type T402 Railing

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Traffic Railing Type T80HT

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Classification	Traffic
Description	32-inch-high concrete F-shaped parapet with an elliptical steel or rectangular HSS railing mounted 18 inches above the concrete. Posts are twin steel plates and are spaced a maximum of 8.33 ft. apart.
Approved test criteria and level	Evaluated and approved for MASH TL-5. It is derived from the Type HT railing which was crash-tested in 1984 with an 80,000-lb. semi-truck at 48 mph and at an angle of impact of 15 degrees. The Type HT was approved for TL-5 use after evaluation of results from the 1984 crash testing.
Nominal height	50 inches
Minimum height after maintenance overlays	47 inches
Special notes	Non-standard slab details are required for this railing.

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Figure A-9. Type T80HT Railing

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Traffic Railing Type C2P

Anchor: #i1161947
Classification	Traffic
Description	9-inch concrete parapet with a round steel-top tube, and two rectangular steel tubes, and a picket panel mounted on the back side of railing. The rails are supported by twin steel posts spaced a maximum of 8 ft. apart.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-4.
Nominal height	44 inches
Minimum height after maintenance overlays	42 inches

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Figure A-10. Type C2P Railing

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Combination Railing Type C1W

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Classification	Combination
Description	9-inch concrete parapet with four steel rectangular tube rails centered at 15.75, 23.5, 31.25 and 41 inches above the sidewalk/roadway surface. The rails are supported by twin steel posts spaced a maximum of 9 ft. apart. The C1W railing is a combination version of the Type T1W railing.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-4.
Nominal height	42 inches
Minimum height after maintenance overlays	42 inches

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Figure A-11. Type C1W Railing

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Combination Railing Type C221

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Classification	Combination
Description	Vertical faced concrete parapet with a single pipe rail mounted 42 inches above the sidewalk/roadway surface. It features a bolt anchorage system for the steel rail posts that may be drilled and epoxy-anchored, allowing slip-forming of the concrete parapet. Its parapet is thicker than that of the C201 railing, from which its design is derived, allowing for optional use of welded wire reinforcement.
Approved test criteria and level	Evaluated and approved for MASH TL-3.
Nominal height	42 inches
Minimum height after maintenance overlays	42 inches

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Figure A-12. Type C221 Railing

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Combination Railing Type C223

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Classification	Combination
Description	32-inch-high concrete post-and-beam railing with a single pipe rail mounted 42 inches above the sidewalk/roadway surface. It features a bolt anchorage system for the steel rail posts that may be drilled and epoxy-anchored, allowing slip-forming of the concrete parapet.
Approved test criteria and level	Evaluated and approved for MASH TL-3.
Nominal height	42 inches
Minimum height after maintenance overlays	42 inches

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Figure A-13. Type C223 Railing

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Combination Railing Type C402

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Classification	Combination
Description	24-inch concrete parapet and a steel ellipse or rectangular HSS 18 inches above the concrete. It also includes a 2-inch pedestrian pipe rail between the parapet and the top rail to be used on the sidewalk side of the railing. It has twin steel posts spaced a maximum of 10 ft. apart. It features a bolt anchorage system for the steel rail posts that may be drilled and epoxy-anchored, allowing slip-forming of the concrete parapet. Its parapet is thicker than that of the C4(S) railing, from which its design is derived.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-4.
Nominal height	42 inches
Minimum height after maintenance overlays	42 inches

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Figure A-14. Type C402 Railing

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Combination Railing Type C66

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Classification	Combination
Description	32-inch-high concrete post-and-beam railing with a single pipe rail mounted 42 inches above the sidewalk/roadway surface. It has a 9-inch-tall concrete curb with concrete posts spaced at 6.5 feet maximum. The concrete railing is 12 inches deep and 12 inches wide.
Approved test criteria and level	Successfully crash-tested and approved for MASH TL-3.
Nominal height	42 inches
Minimum height after maintenance overlays	42 inches

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Figure A-15. Type C66 Railing

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Pedestrian Railing Type PR22

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Classification	Pedestrian
Description	Four pipe rails, with 3.5-inch HSS steel pipe for the top rail and 2.375-inch HSS steel pipe for the lower rails, on a 13-inch concrete parapet. Its steel posts are spaced a maximum of 10 ft. apart.
Approved test criteria and level	The PR22 railing is designed for pedestrian loads only. It has not been crash-tested, and it is not intended for exposure to traffic. If this railing is used on a bridge or culvert, it must be protected from vehicular impact by an approved bridge rail type.
Nominal height	42 inches
Minimum height after maintenance overlays	42 inches

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Figure A-16. Type PR22 Railing

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Pedestrian Railing Type PR3

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Classification	Pedestrian
Description	2-ft-wide concrete posts spaced a maximum of 12 ft apart. Between the concrete posts there are two steel pipe rails centered 42 inches and 13.5 inches from the sidewalk surface with vertical steel pickets connected to the steel pipe rails. A 6-inch-tall concrete curb is placed between the concrete posts.
Approved test criteria and level	The PR3 railing is designed for pedestrian loads only. It has not been crash-tested, and it is not intended for exposure to traffic. If this railing is used on a bridge or culvert, it must be protected from vehicular impact by an approved bridge rail type.
Nominal height	43.75 inches
Minimum height after maintenance overlays	42 inches
Special notes	The PR3-HD is to be used with this railing when an ADA-compliant handrail is needed.

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Figure A-17. Type PR3 Railing