1.1 Design intention and function require that both the construction unit and the design unit should reasonably determine the project scale and building standards, so as to avoid insufficient or oversized scale, resulting in re-construction or waste. The construction unit should actively cooperate with the design unit in the whole design process, and specify the design intention and the desired function, so that the design unit fully understand what the fundamental problem of the design object to be solved is, and understand the requirements of production technology and people flow and logistics in detail. The construction unit shall provide relevant materials at any time to reflect the relevant situation, which can not only avoid the repeated modification of the design drawing, but also shorten the design time and ensure that the design scheme is practical, economical and effective. In this way, the project estimate in the design stage does not exceed the investment estimate in the decision-making stage. The research shows that although the engineering design cost accounts for 3% ~ 5% of the engineering construction cost, in general, its influence on the construction cost is more than 75%. For example, for products with large quantity and light weight, the large-span crane is blindly set without considering the transportation mode and frequency of raw materials and products, which causes the use waste of crane and the slow running of crane affects the production, and increases the cost of foundation and Structure.
1.2 Plane and Space Design Because of the change of production products and the improvement of production technology, industrial workshops are renovated more frequently than othser types of buildings, so foresight must be taken in structural design and plane layout. Large space, large span and large column spacing should be adopted as far as possible to facilitate the process layout adjustment, reconstruction and construction and equipment installation. As far as possible, refrigeration station, transformer substation, fire control room, monitoring room and so on should be set in the central position. The column distance of light industrial workshop is 8m more economical, the equipment, people flow and logistics layout is more flexible, can be arranged between the columns intersperse.