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Section 2: Metal Railing

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Traffic Railing Type T131RC

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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.



Type T131RC Railing (click in image to see full-size image) Anchor: #i999302grtop

Figure A-1. Type T131RC Railing

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Traffic Railings Type T631 and T631LS

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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 TL-2. 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.



 (click in image to see full-size image) Anchor: #LQSNNNEEgrtop

Figure A-2.

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Pedestrian Railing Type PR1

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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 PR1 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



Type PR1 Railing (click in image to see full-size image) Anchor: #i999638grtop

Figure A-3. Type PR1 Railing


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