Home Business Engineering And Construction Bridge Design Services Structure Detail Drawings SD 5: Substructures SD 5: Substructures SD 5: Substructures SD Drawing Number Description View SD Drawing as PDF Download Microstation DGN as ZIP SD 5.01 Structural Excavation Payment Limits SD 5.01 SD 5.01 SD 5.02 Structure Backfill Payment Limits SD 5.02 SD 5.02 SD 1: Railings SD 2: Approaches SD 3: Deck Joints SD 4: Deck and Girders SD 5: Substructures SD 6: Drainage Structures - SD 6.01-6.11 Series (Reinforced Concrete Box Culverts) SD 6: Drainage Structures - SD 6.20 Series (Precast Box Culvert) SD 6: Drainage Structures - SD 6.30 Series (Pipe Culvert Headwalls) SD 7: Retaining Walls SD 8: Sound Barrier Walls SD 9: Traffic Structures