Home Business Engineering And Construction Bridge Design Services Structure Detail Drawings SD 4: Deck And Girders SD 4: Deck and Girders SD 4: Deck and Girders Structure Detail drawings are not yet available for deck and girders. 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