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The minimum deck thickness includes a 1 inch wearing surface.
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The Pennsylvania DOT (PennDOT) Design Manual Part 4 Structures (DM-4) recommends a minimum reinforced concrete deck thickness of 8.0 inches (Part B, 9.7.1.1) which includes a 0.5 inch wearing surface.
The Ohio DOT (ODOT) Bridge Design Manual (BDM) requires calculating a minimum reinforced concrete deck thickness using the following equation (BDM 302.2.1): T_{hbox{min} } left( {text{inches}} right) = left( {S, +, 17} right)left( {12} right)/36 ge 8.5{text{ inches}} (1 where S is the effective span length in feet determined in accordance with AASHTO LRFD 9.7.3.2 (AASHTO 2007).
Assuming that the deck thickness varies from 7 to 11 inches and the minimum cover to the bottom surface is 1.0 inch, this research considered a range of 6 10.0 inches to be used in the effective depth. .
Assuming that the deck thickness varies from 7 to 11 inches and the minimum cover to the bottom surface is 1.0 inch, this research considered a range of 6 10.0 inches to be used in the effective depth.
However, the effect of deck thickness is marginally pronounced.
The effective depth is a function of the deck thickness and the reinforcement cover to the bottom surface of deck.
Total deck thickness (H): The FDOT SDG requires that cast-in-place deck thickness shall be 8.0 inches for short bridges and 8.5 inches for long bridges (SDG 4.2.2).
Hence, deck thickness could be reasonably increased for the purpose of reducing noise levels.
Open image in new window Fig. 17 Effect of temperature (deck thickness).
For each lightweight concrete bridge deck selected for inclusion in this study, a companion normalweight bridge deck of similar age, traffic loading, and environmental exposure, structural type, deck thickness, and geometric configuration was selected to facilitate comparison.
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