FDOT Standard Plans Index 450-512: Bearing Plates (Type 2) - Prestressed Florida - I & AASHTO Type II Beams

Design Criteria

Design Criteria AASHTO LRFD Bridge Design Specifications ; Structures Design Guidelines ( SDG )

Design Assumptions and Limitations

Design Assumptions and Limitations This standard is intended for use with squared - end Florida - I and AASHTO Type II Beams with or without end diaphragms. This standard contains generic details and notes for beveled and embedded bearing plates for prestressed concrete Florida - I and AASHTO Type II Beams with or without skewed support conditions. Use this standard with Indexes 45 0 - 010, 45 0 - 036, 45 0 - 045, 45 0 - 054, 45 0 - 063, 45 0 - 072, 45 0 - 078, 45 0 - 084, 45 0 - 096, 45 0 - 120 and 40 0 - 510.

Embedded Bearing Plates A are required for all Florida - I Beams (FIBs). Embedded Bearing Plates A and Beveled Bearing Plates B are required for beams on grades greater than 2%.

Payment

Payment The cost of beveled and embedded bearing plates is incidental to the cost of the prestressed beams they are used with. No separate payment is made. Example A design calls for FIBs with Type F Bearing Pads.

The Grade along the PGL and centerline of the beam is negative 2.5% and slope due to camber and deflection is less than 0.0125 radians. The span has no skew. Standard Plan s Instructions Topic No.

625 - 010 - 003 Index 450 - 512 Bearing Plates (Type 2) - Prestressed Florida - I & AASHTO Type II Beams Because the slope is greater than the absolute value of 2%, beveled bearing plates are required. From Index 40 0 - 510 a Type F Bearing Pad is 10" x 2' - 8", and the Beveled Bearing Plate (Plate B) has dimensions C=1' - 0" and D=3' - 0". The bridge has a 0 degree skew (Φ=90°); by Index 45 0 - 010, use Case 1, Condition 3.

END 1 END 2 X =0.5" X =0.5" - (12)*( - 0.025)) = 0.8" Y = 0.5" - (12)*( - 0.025)) = 0.8 " Y=0.5" Complete the Table with location information and the following from the example:

What your plans must show

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

• 510. Complete the following "BEARING PLATE DATA TABLE" and include it in the plans. Fill in the table to correspond with data on the appropriate "TABLE OF BEAM VARIABLES" using inch units for Beveled Plate dimensions 'X' and 'Y' rounded to 1/16th of an inch. If Beveled Bearing Plates B are not required, fill in the corresponding columns with "N/A". See FDM 115 for more information regarding use of Data Tables. Use the following equations to determine the Beveled Bearing Plate B thicknesses for "PLAN VIEW CASES"' and "END ELEVATION CONDITIONS"' corresponding to those shown on Index 45 0
• 120. The Slope parameter in these equations requires decimal units and correct sign convention:
• Standard Plan s Instructions Topic No. 625
• - 512 Bearing Plates (Type 2)
• - I & AASHTO Type II Beams END 1 END 2 (I) PLAN VIEW CASE 1: (a) END ELEVATION CONDITION 1 or 2 (Positive Slope) X = 0.5" + (C) x Slope X = 0.5" Y = 0.5" Y = 0.5" + (C) x Slope (b) END ELEVATION CONDITION 1 or 3 (Negative Slope) X = 0.5" X = 0.5"
• Standard Plan s Instructions Topic No. 625
• - 512 Bearing Plates (Type 2)
• - I & AASHTO Type II Beams