Drainage details of wall in bridge typical structure details dwg file

Drainage details of wall in bridge typical structure details that includes a detailed view of filling with selected material, filling with granular material sand filter layer, Drainage layer (pebbles e = 0.60), perforated tube of ø4 "pvc sap for longitudinal drainage, your B. Drain ∅ 4 "pvc sap and much more of drainage details.