Mar 16, 2010 - Two separate surveys are used to collect pavement condition data. First, a windshield survey is used to collect the severity and extent of surface cracking and other specific types of distress in the pavement. The windshield survey is
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Idea Transcript
Section 15 Concrete Reinforcement 15.1
Introduction
This section is intended to aid the bridge designer and detailer in the area of concrete reinforced design and detailing. The tables in this section simplify the design and detailing of concrete reinforcement splices and required covers. Also included are suggested details intended to ease the construction process and provide seismic resistance.
15.2
Spacing
The minimum spacing shall meet NYSDOT LRFD Bridge Design Specification Section 5.10.3.1 requirements. The maximum clear spacing between parallel bars shall not be more than 1N-6O. The clear space between bars shall also apply to the clear distances between the contact splices and adjacent splices of bars. Bar spacings as indicated are always between the center of the bars unless otherwise noted as a clear distance. When reinforcement in beams or girders is placed in two or more layers, the bars in the upper layers shall be placed directly above those in the bottom layer.
15.3
Cover
The following list pertains to the minimum cover for plain, epoxy and galvanized reinforcing bars. Refer to Section 5 for cover of monolithic decks. Top of sidewalk slabs ................................................................................................ 1 ½ O Beams and Columns ...................................................................................................... 2O Pedestal (Top)................................................................................................................. 2O Pedestal (Sides) .............................................................................................................. 3O Walls and Piers above footing (Including those adjacent to water)................................. 2O* Footings (Including unformed bottom) ............................................................................ 3O** Approach slab (Top)........................................................................................................ 3O Approach slab (Bottom and Sides) ................................................................................. 3O Bottom of bottom slab of cast-in-place culvert ................................................................ 3O Bottom of top slab of cast-in-place culverts and rigid frames.......................................... 2O All other cast-in-place culvert faces ................................................................................ 2O Top of top slab of precast culverts (Fill