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Section 11: Cast-in-Place Concrete Slab and Girder Spans (Pan Forms)

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Materials

Use Class S concrete ( fc ́ = 4.0 ksi). Refer to district-specific corrosion protection requirements for regions where bridge decks are exposed to de-icing agents and/or saltwater spray with regularity. If thus required, use Class S (HPC) concrete.

Use Grade 60 reinforcing steel. Refer to district-specific corrosion protection requirements for regions where bridge decks are exposed to de-icing agents and/or saltwater spray with regularity. If thus required, use one of the following types of corrosion resistant reinforcement (refer also to Item 440):

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  • Epoxy-Coated Reinforcing Steel meeting the requirements of ASTM A775 or A934
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  • Hot-Dip Galvanized Reinforcing Steel
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  • Glass Fiber Reinforced Polymer (GFRP) Bars; The design for GFRP reinforcement in bridge decks must adhere to the AASHTO LRFD Guide Specifications for GFRP-Reinforced Concrete Bridge Decks and Traffic Railings.
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  • Dual Coated Reinforcing Steel meeting the requirements of ASTM A1055
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  • Low Carbon/Chromium Reinforcing Steel meeting the requirements of ASTM A1035 Gr 100 Ty CS
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  • Stainless Reinforcing Steel meeting the requirements of ASTM A955 Ty 316LN, XM-28, 2205, or 2304; Use only for extreme chloride exposure in coastal areas.
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Geometric Constraints

The only skew angles and span lengths available for pan form spans are provided on the Concrete Slab and Girder (Pan Form) standard drawings. Forming systems currently in use do not provide for alternative skews or span length.

Limit slab overhangs to a maximum of 13.75 in. measured from face of stem to edge of slab.

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Structural Analysis

None required.

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Design Criteria

None required. Pan form spans are predesigned and shown on standard drawings.

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