FDOT Standard Plans Index 400-091: Approach Slabs ( Rigid Pavement Approaches)

Design Criteria

Design Criteria AASHTO LRFD Bridge Design Specifications ; Structures De sign Guidelines ( SD G )

Design Assumptions and Limitations

Design Assumptions and Limitations Index 400 - 091 is intended to be used with concrete (rigid) roadway approach pavement. Approach Slabs are intended to provide a smooth vertical transition between the roadway approach pavement and the bridge. They are supported at the bridge end by the end bent and by the embankment at the roadway approach end.

This support configuration all ows the Approach Slabs to rotate and settle as the roadway approach embankment settles. No additional supports (piles, footings, etc.) are required or allowed. Index 400 - 091 works with Index 3 70 - 001 Bridge Approach Expansion Joint - Concrete Pavement.

The roadway approach end of the Approach Slab must be non - skewed to match up with Index 3 7 0 - 001 . See SDG 3.1 for distribution of design loads from the approach slab to the end bent. The details of the approach slab adjacent to the End Bent Backwall as shown on the standard are intended for use with Poured Joint with Backer Rod and Strip Seal Expansion Joints.

If other expansion joint types are used, e.g. finger or modular expansion jo ints, modifications to the standard may be required to accommodate the expansion joints and the blockouts used to install them.

Payment

Payment Item number Item Description Unit Measure 400 - 2 - 10 Concrete Class II, Approach Slabs CY 400 - 7 - A Bridge Deck Grooving SY 400 - 9 Bridge Deck Planing SY 415 - 1 - 9 Reinforcing Steel - Approach Slabs LB

What your plans must show

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

• - 091 requires supplemental sheets, a completed data table and reinforcing bar lists to be included in the Structures Plans. Some roadway elements may need to be carried onto the approach slab, and in these cases special attention must be given to clarifying in the plans which elements are to be included as part of the roadway. In the Roadway Plans: Include details and payment for the optional base under the approach slab. The minimum structural requirement under the approach slab is Optional Base Group
• Standard Plan s Instructions Topic No. 625
• - 091 Approach Slabs (Rigid Pavement Approaches) Approach Slab. The roadway approach end of the Approach Slab shall be non
• - skewed (perpendicular to the stationing line) to match up with the details shown on Index 3 70
• - 001 Bridge Approach Expansion Joint
• - Concrete Pavement. Urban roadway approaches usually have a 6
• - 0" long unless higher TL
• - 6 barrier is required in which case the designer to determine the correct bar size. Complete the following "Approach Slab Table of Dimensions" and include it on the supplemental sheets. See FDM 115 for more information regarding use of Data Tables.