Integrated design is a model design method which is development of a holistic design. Holistically, people divide a project in many small sections and every group only design apart of them. There is hardly discussion in each group. Nowadays, the project team members work together to deal with the whole project. There are fifth designs phases arrange by Royal Institute of British Architects as follows: preparation, Design, pre-construction, construction and use. This essay is focus on using the integrated design method to build a 5-story office and utility. The integrated design can divide in three steps as drainage design, concrete design and foundation design.

2. Drainage Design:

1. Introduction Drainage design provided a system on managing storm water for specific area. The design must be effectively both on cost and conveyance to control the water flow, and protect water quality. This report focuses on the design procedure of drainage network based on information of catchment area, characteristics, slope, land use and flow rate and any other factors. The plan for future development would also be considered into the design. By examines the geology and hydrogeology of the study area, two drainage network was designed. This is a simple drainage design without considering the influence of soil type, different drainage system throughout this area, and water quality. The study area is in the Merseyside area of Britain. Modified and Rational Method would be used for estimating the peak discharge from a specific small area. By using the discharge value, the pipe size the network pattern would be decided. This report will give the information of study area, details of calculations and explanation and also the discussion of the two designs.
2. Project brief: The pipe network should collect the rainfall from the car park and 5 storey office building and