Harbin Jindi–Fengfan Sales Office Project

The Harbin Jindi Fengfan Sales Office project adopts a core construction scheme of prefabricated steel structure system+100% dry process operation, with an assembly rate of 60%. It achieves rapid landing of sales offices in extremely cold areas, balancing efficiency, cost and green construction, and has become a typical practice of Jindi Group's application of prefabricated technology in the Northeast region.

1、 Core construction system of the project

1. Main structure and core components

The main body of the project adopts a steel structure framework, and the load-bearing system consists of prefabricated steel beams and columns in the factory. They are connected on site by high-strength bolts without on-site welding operations. The core enclosure and floor system adopt three major prefabricated components:

Steel framed lightweight floor panels: prefabricated and integrated in the factory, with light weight and high strength. They can be directly hoisted and spliced on site without the need for formwork and concrete pouring.

Prefabricated daughter wall panel: Standardized prefabricated components, integrated waterproof and insulation functions, precise on-site assembly, replacing traditional brick masonry/cast-in-place processes.

The overall components are processed in the factory with precision controlled at the millimeter level, ensuring structural stability and construction quality from the source.

2. Core features of 100% dry construction

The entire project process abandons wet operations (such as concrete pouring, mortar plastering, on-site maintenance, etc.), and all processes are dry assembly:

Prefabrication of components in the factory → transportation to the site → hoisting and positioning → bolt fastening → finished product protection, no maintenance period, no sewage discharge, and no construction waste accumulation.

Completely eliminate dependence on water sources, temperature, and humidity, adapt to the low-temperature construction environment in Harbin during winter, and achieve uninterrupted operations throughout the year.

3. Technical implementation with an assembly rate of 60%

According to the detailed rules for calculating the assembly rate of prefabricated buildings in Heilongjiang Province, the project achieves a 60% assembly rate through three dimensions: prefabrication of the main structure, assembly of the enclosure system, and assembly of the floor system. The Housing and Urban Rural Development Department of Heilongjiang Province:

Main steel structure: Prefabricated beams and columns account for 100%, contributing to the weight of the core assembly rate.

Enclosure and floor: Steel framed lightweight floor slabs, prefabricated daughter wall panels, and other non load bearing components are 100% assembled to further improve assembly rates.

Interior and mechanical and electrical: Simultaneously adopting prefabricated pipelines and modular decoration, forming a full process assembly system of "structure+enclosure+interior".

2、 The core advantages of prefabricated construction

1. The construction period has been significantly shortened

The main construction of the traditional sales office (including wet work and maintenance) takes about 15-20 days, while the main structure of this project is completed in only 7 days, shortening the construction period by more than 60%.

Dry construction has no waiting time for maintenance, and components can be installed as soon as they arrive, achieving the goal of "starting construction immediately and quickly opening up", and seizing the marketing window period.

2. Significant cost optimization

Reduce the cost of measures such as templates, scaffolding, and maintenance by about 40% compared to traditional construction.

Labor cost reduction: The on-site workload has been reduced by 70%, requiring only a small number of lifting and assembly workers to alleviate the labor shortage in Northeast China during winter.

Reduce construction waste by over 80%, lower the costs of transportation and environmental protection, and meet the requirements of green construction.

3. Adaptation to extremely cold climates

Traditional wet operations cannot be carried out in winter in Harbin (below -20 ℃), while 100% dry operations in this project can be carried out in winter without being limited by low temperatures.

Steel structures and prefabricated components have stable performance at low temperatures, with no risk of frost heave or cracking, ensuring the quality and safety of winter construction.

4. Double improvement of quality and environmental protection

Factory standardized production, controllable component quality, small on-site assembly errors, avoiding common quality problems of traditional cast-in-place.

Green and low-carbon: no wet operation wastewater, no on-site dust, steel structure recycling rate of over 90%, in line with the dual carbon goal.

3、 Project Value and Industry Significance

1. Regional demonstration value

As a supporting sales office for high-end projects in Harbin's Hasi area, Jindi Fengfan solves the construction problems in extremely cold regions with prefabricated technology, providing replicable "fast construction+winter construction" solutions for sales offices and temporary commercial buildings in the Northeast region.

2. Significance of Technical Practice

The project has verified the adaptability of 60% assembly rate and 100% dry construction in short cycle and high turnover buildings such as sales offices, promoting the extension of prefabricated technology from "residential applications" to "commercial supporting and temporary building" scenarios.

3. Brand and Market Value

The fast landing sales office assists in the early opening of projects, enhancing brand image and market competitiveness; At the same time, green construction technology is in line with Harbin's urban development plan, helping projects obtain green building related certifications and policy support.

4、 Summary

The Harbin Jindi Fengfan Sales Office project focuses on steel structure main body, prefabricated components, 100% dry construction, and 60% assembly rate, achieving comprehensive surpassing of traditional construction in terms of construction period, cost, climate adaptability, and green environmental protection. The project is not only an innovative practice of prefabricated technology by Jindi Group in the Northeast region, but also provides an efficient, reliable, and scalable construction model for the industrialization of construction in the northern cold regions, helping the industry achieve the high-quality development goals of "efficiency improvement, cost reduction, green, and cold resistance".