Section 2: Metal Railing

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.
Sample alt text
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.
Sample alt text
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
Sample alt text
Figure A–3. Type PR11 Railing