Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge
3. Flow Charts
Deck Slab Design Flow Chart Text
- Assume a deck slab thickness based on girder spacing and width of girder top flange (Design Step 4.2)
- Determine the location of the critical section for negative moment based on the girder top flange width (S4.6.2.1.6) (Design Step 4.6)
- Determine live load positive and negative moments (A4) (Design Step 4.7)
- Determine dead load positive and negative moment (Design Step 4.8 and 4.9)
- Determine factored moments (S3.4) (Design Step 4.8)
- Design main reinforcement for flexure (S5.7.3)
- Determine longitudinal distribution reinforcement (S9.7.3.2) (Design Step 4.12)
- For Slabs on Continuous Beams:
Steel beam - Determine area of longitudinal reinforcement in the deck in negative moment regions of the girders (S6.10.3.7). Concrete Simple Spans Made Continuous for Live Load - Determine the longitudinal slab reinforcement at intermediate pier areas during the design of the girders (S5.14.1.2.7b)
- Determine strip width for overhang (S4.6.2.1.3) or where applicable, use S3.6.1.3.4 (Design Step 4.10)
- Determine railing load resistance and rail moment resistance at its base (S13.3)
- Design overhang reinforcement for vehicular collision with railing + DL (Case 1 and Case 2 of SA13.4.1)
- Determine factored moments from DL + LL on the overhang (Case 3 of SA13.4.1)
- Design overhang reinforcement for DL + LL
- Determine the controlling case for overhang reinforcement, Case 1, Case 2 or Case 3
- Detail reinforcement (Design Step 4.11)
END.