Details of RIP – RAP in drainage channel of green tower with 60m height is given in the autocad 2D DWG drawomg file. Riprap is commonly used in drainage channel to provide a stable lining to resist erosion by channel water. This prevents the migration of fined-grained soils from sub-grade into riprap and results in settlement and loss of ground. Side slope of the rip rap and section were explained in the drawing file.