Section 2: Metal Railing
Section 2: Metal Railing
Traffic Railing Type T131RC
Traffic Railing Type T131RC
Classification | Traffic |
Description | Retrofit railing for use on existing bridges with curbs. It has two steel square tubes and W6X15 posts spaced a maximum 5.0 ft. apart. |
Approved test criteria and level | Successfully crash-tested and approved for MASH TL-3 |
Nominal height | 36 inches (Typ); railing height depends on thickness of existing overlays. |
Minimum height after maintenance overlays | 34 inches (Typ); height depends on curb height and thickness of existing overlays. |

Figure A–1. Type T131RC Railing
Traffic Railings Type T631 and T631LS
Classification | Traffic |
Description | These railings are 31 inches high, w-beam rail supported on S3x5.7 steel posts. Posts are spaced 3 ft. 1 1/2 inc. for the T631 railing and 6 ft. 3 in. for the T631LS railing. |
Approved test criteria and level | T631: Successfully crash-tested and approved for MASH TL-3. T631LS: Successfully crash-tested and approved for MASH TL2. It cannot be used for bridges with speeds over 45 mph. |
Nominal height | 31 inches |
Minimum height after maintenance overlays | 27 inches |
Special notes | Do not use these railing for separator railing between traffic lanes and pedestrian walkway. The length of W-beam is the MBGF length of need plus the length of T631/T631LS bridge rail. Therefore, it is continuous across the MBGF and Type T631/T631LS bridge rail and is fabricated in 12’-6” or 25’-0” sections. Note that the fabrication lengths should be taken into consideration when calculating the MBGF length, since the required quantity of MBGF may need to be adjusted until the length of W-beam (MBGF + T631/T631LS) is a multiple of 12’- 6” or 25’-0” . The length of the T631/T631LS is based on the nominal end of bridge rail as shown on the standard and should not be adjusted. |

Figure A–2. Type T631 Railing
Pedestrian Railing Type PR11
Classification | Pedestrian |
Description | Six pipe rails, with 3.5-inch HSS steel pipe for the top rail and 2.375-inch HSS steel pipe for the lower rails. Its 5-inch-wide steel-plate posts are spaced a maximum of 10 ft. apart. |
Approved test criteria and level | The PR11 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 |

Figure A–3. Type PR11 Railing