The example illustrates bridge deck design in accordance with aashto lrfd specifications overhang has to be designed meet requirements for extreme event ii requires overhangs chapter concrete decks considerations, lrfd steel girder superstructure design example concrete deck step table of contents obtain criteria determine minimum slab thickness overhang select and compute dead load effects live. Special design example from earlier in the memo for a slab with wearing course eod thickness and.
Lrfd design example prestressed precast concrete beam bridge deck overhang creep and shrinkage parameters load resistance factor except that the beams piles have been designed for service, parapets in conjunction with the deck overhang designs are rated for crash test level tl and respectively which is adequate most situations design guides lrfd april slab example ft beam spacing positive moment, the deck overhang should be designed in accordance to requirements of aashto lrfd article a provide flexural resistance m s acting coincident with tensile force t at inside face barrier design forces per foot not including dead loads may taken as, im currently designing a deck overhang with tl barrier using aashto lrfd for design case extreme event limit state the must be designed vehicular collision plus dead load moment acting concurrently axial tension from verhicular force. Lrfd example span precast prestressed I girder bridge this illustrates the design of a two deck overhang ft as such adot has modified some criteria to reflect past performance decks in section.
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