FDOT Standard Plans Index 460-490: Traffic Railing - ( Rectangular Tube Retrofit )

Design Criteria

Design Criteria MASH , Test Level 4; AASHTO LRFD Bridge Design Specifications , 7 th Edition, Section 13; Structures Design Guidelines ( SDG )

Design Assumptions and Limitations

Design Assumptions and Limitations The Traffic Railing ( Rectangular Tube Retrofit), Index 460 - 4 9 0, is applicable for retrofitting existing bridge, approach slab and retaining wall mounted 32” F - Shape, 32” New Jersey Shape and 32” Corral Shape traffic railings, and 34” Vertical Face traffic railing retrofits in accordance with the requirements of SDG 6.7.4 . Index 460 - 490 provide s a more economical solution for upgrading these obsolete traffic railings when compared with replacing the obsolete traffic railings and portions of the bridge decks , approach slabs and/or retaining walls that support them. No portions of the existing traffic railing types listed are required to be removed in order to construct the Rectangular Tube Retrofit.

Determine t he applicability of the Rectangular Tube Retrofit to a particular bridge, approach slab or retaining wall mounted traffic railing based on the requirements of SDG 6.7.4, a review of the Load Rating of the existing bridge (if applicable) , a nd a comparison of the existing railing geometry and reinforcing to those shown on the obsolete standard drawings for each railing. See SPI 536 - 002 for information about existing 32” F - Shape (older versions) and 32” New Jersey Shape traffic railings. See the F Y 2017 - 18 Design Standards for information about existing 32” F - Shape and 32” Corral Shape traffic railings and 34” Vertical Shape traffic railing retrofits.

The average weight per linear foot of the Rectangular Tube R etrofit = 30 lb/ft . Determine the limiting stations for the Rectangular Tube Retrofit as follows: For installations on existing New Jersey Shape and F - Shape traffic railings listed in SPI 536 - 002, begin or end the Rectangular Tube Retrofit 3’ - 0” from the open joint at Begin or End Bridge if the wingwall is less than 1 8 ’ - 0” long. If the wingwall is 1 8 ’ - 0” long or longer, begin or end the Rectangular Tube Retrofit 3’ - 0” from the beginning or end of the wingwall away from the bridge.

For installations on existing Vertical Face Traffic Railing Retrofits, Design Standards Index 480 Series, and 1987 thru 2000 Roadway and Traffic Design Standards Index 401 Schemes 1 and 19 , begin or end the Rectangular Tube Retrofit 3’ - 0” from the open joint at Begin or End Bridge . For installations on existing F - Shape Traffic Railings, Design Standards Index 420, and Corral Shape Traffic Railings, Design Standards Index 424, begin or end the Rectangular Tube Retrofit 3’ - 0” from Begin or End Approach Slab away from the bridge. For the bridge mounted traffic railings listed above, i f the traffic railing continues beyond the approach slab and/or wingwall as a retaining wall mounted traffic railing, Standard Plan s Instructions Topic No.

625 - 010 - 003 Index 460 - 490 Traffic Railing - (Rectangular Tube Retrofit) continue the Rectangular Tube Retrofit along the retaining wall and show the limiting station 3’ - 0” from Begin or End Traffic Railing on the retaining wall away from the bridge . For installations on existing retaining wall mounted F - Shape Traffic Railings, Design Standards Index 420, and Corral Shape Traffic Railings, Design Standards Index 424, that are not associated with a bridge, begin or end the Rectangular Tube Retrofit 3’ - 0” from Begin or End Traffic Railing on the retaining wall. …

Payment

Payment Item number Item Description Unit Measure 460 - 71 - 4 Traffic Railing ( Rectangular Tube Retrofit ) LF Include this pay item and the estimated quantity with the Structures Pay Items if Structures Component Plans are used. Include this pay item and the estimated quantity with the Roadway Pay Items if Roadway Component Plans are used.

What your plans must show

Plan Content Requirements for this index — the SPI's checklist for designers.

• Standard Plan s Instructions Topic No. 625
• - (Rectangular Tube Retrofit) On the control drawings or Plan and Profile sheets, identify the construction of the Rectangular Tube Retrofit , define its limiting stations, and identify the existing traffic railing type as follows: [Select one: Begin, End] Construction Traffic Railing (Rectangular Tube Retrofit), Index 460
• - 490, on existing [select one: F
• - Shape, Corral Shape, New Jersey Shape or Vertical Face Retrofit] Traffic Railing , Sta. XX+XX.XX Completed example callout: Begin Construction Traffic Railing (Rectangular Tube Retrofit), Index 460
• - 490, on existing New Jersey Shape Traffic Railing, Sta. 12+34.56 Clearly indicate any existing items that must be removed from the existing traffic railing to allow for installation of the Rectangular Tube Retrofit, e.g. existing top mounted fences and single post sign supports as listed in the Design Assumptions and Li mitations above. Prepare the Traffic Control Plans for the construction of the retrofit in accordance with Standard Plans Index 102