8 document 2.1.1 market share ❖ by the end of 2017, the proportion of newly-built precast buildings in the newly-built construction area of the year shall not be less than 10%; ❖ from 2018 to 2020, the above proportion will strive to increase by 10% year by year; ❖ by the end of 2020, strive to make the above proportion not less than 40%; (civil buildings in all areas of a city in Central China).

2.1.2 policies and measures ❖ pay the land transfer fee by stages; ❖ when the plan is approved, the building area of the assembled part of the outer wall may not be included in the floor area ratio (exceeding 3%, and the volume of the excess part shall be calculated); Note: when reporting the regulations, report the regulations according to the cast building to obtain the area reward.

2.2.2 pipeline separation ❖ basic concept: specification definition: pipeline separation is the way to set equipment and pipeline outside the structural system; Pipeline disciplines included in the calculation of pipeline separation ratio: Electrical (strong current, weak current, communication), water supply and drainage, heating and other disciplines..

The business type of the project is high-rise and overlapping, with a total construction area of 338418.03 m2, including: (1) the total construction area of residential (distinguishing different business types) is 218916.13 M2; (2) The total construction area of overlapping assembly is 31486.91 m2; (3) The building area of the basement is 98186.23 m2.

Ring Clutch

2.1.8 four basic standards ❖ main structure ≥ 20 points; ❖ parapet wall and internal partition wall ≥ 10 points; ❖ 100% of the whole decoration is fully implemented; ❖ the assembly rate shall not be less than 50%.

2.1.6 precast building system ❖ structural system; ❖ external enclosure system (the external enclosure structure and other parts are uniformly summarized as external enclosure system); ❖ equipment and pipeline system; ❖ built in system.

Interpretation of precast buildings 2.1 interpretation of policies: → wuzhenggui [2017] No.

2.1.9 class V structure ❖ precast concrete structure building; ❖ cast steel structure building; ❖ steel and concrete mixed structure building; ❖ wood structure reference execution; ❖ composite structure building.

-01 – in the era of wedge industrialization 4.0, the government and competent departments at all levels vigorously promote the precast building.

❖ the supervision proportion of pre-sale funds shall be 15%; Note: if the construction of the main structure of small high-rise buildings and above in the city reaches more than one-third of the total floors, you can apply for the pre-sale certificate.

2.1.4 evaluation method ❖ pre evaluation: in the design stage, the assembly rate is calculated according to the design documents; ❖ project evaluation: after the completion acceptance of the project, calculate the assembly rate according to the completion acceptance data and determine the evaluation grade.

It can reduce wet operation and make the construction period more controllable.

2.1.10 for civil buildings with no minimum requirements for the application proportion of precast components in the main structure, the height exceeds the maximum applicable height; ❖ for non residential buildings, the aboveground floor area is ≤ 10000 square meters; ❖ ground floor ≤ 3000m2 Sales Department, shops and clubs; ❖ for special technical buildings, the single assembly rate shall be ≥ 30%; 2.1.11 assembly rate calculation ❖ composition of assembly rate calculation rules: main structure + enclosure wall and internal partition wall + decoration and equipment pipeline + innovation.

❖ calculation formula of assembly rate the assembly rate shall be calculated according to the following formula: P – assembly rate Q1 – actual score value of main structure index Q2 – actual score value of enclosure wall and internal partition wall index Q3 – actual score value of decoration and equipment pipeline index Q4 – assembly rate evaluation items Q1, Q2 The total score of the evaluation items missing in Q3 Q5 – the actual score of the innovation index 2.2 assembly scheme focuses on the interpretation of 2.2.1 the main structure ❖ the high-rise part is a shear wall structure residence, and the building height is less than 130m, which is suitable for the assembled integral shear wall structure system; ❖ applicable height: when all vertical components are cast-in-situ and the floor adopts composite beams and plates, the maximum applicable height shall be taken; When the total shear force borne by the bottom of the precast shear wall member is greater than 80% of the total shear force of the floor, the maximum applicable height shall be calculated according to the value in brackets.

→ “technical standard for precast concrete buildings GB / t51231-2016” and “evaluation standard for precast buildings” 2.1.3 evaluation unit: take the single building as the grade evaluation.

The development of precast buildings is an effective way to drive technological progress and improve production efficiency- 02 – project case 1.1 a project is located in a city in Central China, with a land area of 116003.09 m2.

2.1.5 grade evaluation ❖ preconditions: meet the four basic standards, and the application proportion of precast components in the vertical components of the main structure is ≥ 35%; ❖ evaluation standard: class a precast building when the assembly rate is 60% ~ 75%; When the assembly rate is 76% ~ 90%, Class AA precast building; When the assembly rate is 91% or above, AAA graded building.

The assembly rate of high-rise and overlapping projects of the project is 50%, and the assembly area is 100%.

❖ reduce the special fund expenses for new wall materials; ❖ preferential policies for VAT reduction and exemption.

→ detailed rules for calculating the assembly rate of precast buildings in a city in Central China 2.1.7 general provisions ❖ single buildings shall be confirmed according to the building number of the planning approval; ❖ main building + podium, the main building and podium can be calculated separately; ❖ the number of floors ≤ 3, and the aboveground building surface ≤ 500 ㎡, which can be calculated in groups; ❖ beyond the specified scope, adopt expert demonstration to determine the proportion, calculation method and score.

The precast building is a systematic project, which assembles the precast parts on the site through the method of system integration to realize the prefabrication of the main structural components of the building, the non masonry and full decoration of the non load-bearing enclosure wall and internal partition wall.

❖ handle the pre-sale license node in advance; Note: if the construction of the main structure of small high-rise buildings and above in the city reaches more than one third of the total floors, and the construction progress and completion delivery date have been determined, the pre-sale license can be handled.