What are the technical regulations for the preparation of design documents for construction projects in Chongqing?

There are three aspects. Based on the query of the special chapter on building information models in the "Technical Regulations on the Preparation of Construction Drawing Design Documents for Construction Projects in Chongqing (2022 Edition)".

1. It is stipulated that the building information model in the construction drawing design stage should include professional models such as the overall plan, architecture, structure, electrical, water supply and drainage, and HVAC designed for the project.

2. It is stipulated that the accuracy and coordination of the model should be checked before delivery, and the submitted model should be consistent with the design drawings.

3. It is stipulated that the establishment of building information models should be carried out simultaneously with the design of each major, and communication, discussion, and decision-making in the collaborative work of various majors should be carried out around the building information model.