Laboratory Design – One-Stop Contracting for Laboratory Engineering – Nanjing Tuozhan Technology

During the laboratory construction process, "misalignment between design and construction" is one of the most common issues: While the drawings provided by the design firm appear flawless on paper, they often prove impossible to implement in practice during actual construction. Meanwhile, after the construction team follows the drawings, they may discover that equipment cannot be installed—or that experimental procedures end up being less efficient than expected. At the root of these problems lies the fact that "design" and "construction" are managed by separate entities, leading to a noticeable lack of collaboration. Nanjing Expansion Technology The newly launched "Lab Design + Engineering One-Stop Contracting" service thoroughly addresses this pain point. By adopting a model of "same team, same standards, same accountability," it ensures that design plans are precisely implemented at a 1:1 scale, helping clients save both time and costs.

I. The Core Value of One-Stop Contracting: Seamless Coordination Between Design and Construction

"At the heart of 'Laboratory Design + Engineering One-Stop Contracting' is having the design team take full control of the construction process, ensuring that the work strictly adheres to the design intent and effectively avoids the issue of 'beautiful drawings but impractical implementation.' Specifically, the value of this model lies in three key aspects:"

1. The design plan is more practical and feasible.

In traditional design, designers often focus solely on "function and aesthetics," neglecting the feasibility and cost of construction. However, under Nanjing Expansion Technology's one-stop contracting model, designers engage in thorough communication with the construction team already during the planning stage, carefully considering practical factors such as construction techniques, material availability, and cost control—ensuring that the设计方案 is not only "easy to use" but also "easy to build."

For example, in a certain chemical laboratory design plan, the designer originally intended to use all-glass partitions to separate the experimental area from the office space. However, the construction team pointed out that while glass partitions are visually appealing, adding additional utility lines later on would require breaking the glass, leading to higher costs. Taking the construction team's advice into account, the designer adjusted the partition design to a "glass + light steel keel" combination, incorporating pre-installed access points for future maintenance. This approach not only preserved the aesthetic appeal but also enhanced the facility's maintainability down the road—while simultaneously reducing overall construction expenses.

2. More precise construction process

The design team provides on-site guidance throughout the entire process, which is key to offering a one-stop contracting solution. Nanjing Expansion Technology mandates that the lead designer for each project be stationed onsite weekly, with a particular focus on the following stages:

• Construction of concealed works—including the laying of electrical and plumbing pipelines, welding of ventilation ducts, waterproofing treatments, and more—is meticulously inspected by designers against the blueprints. They verify the pipeline routes, pipe diameters, and welding quality to ensure full compliance with design specifications.
• Key equipment installation: For items such as fume hoods, biosafety cabinets, and laboratory benches, the designer will work closely with the construction team and equipment suppliers to jointly confirm the installation locations, ensure proper leveling, and verify interface connections, guaranteeing that the equipment operates smoothly.
• System Debugging: After the ventilation system, purification system, and intelligent system have been installed, the designer will personally oversee the debugging process—such as testing the air volume and velocity of fume hoods, as well as verifying the cleanliness level in the purification laboratory—to ensure that all design specifications are met.

3. Clearer accountability主体

Under the traditional model, design and construction are handled by different entities, making it easy for them to blame each other when issues arise. For instance, if the design plan is flawed and leads to rework during construction, the design firm might attribute the problem to a misinterpretation by the construction team, while the construction team could argue that the issue stems from an inherently flawed design. Meanwhile, the client, caught in the middle, finds it increasingly difficult to mediate and resolve the conflict.

Under the one-stop contracting model, Nanjing Expansion Technology acts as the sole responsible entity—whether issues arise during the design phase or the construction phase, the company takes full responsibility for resolving them, ensuring customers remain completely uninvolved in any disputes.

II. A One-Stop Contracting Service Process: Comprehensive Control Across the Entire Chain—from Design to Delivery

Nanjing Tech Expansion's "Lab Design + Engineering One-Stop Contracting" service has established a standardized process, ensuring that each stage progresses efficiently and smoothly—specifically, it includes 6 steps:

1. Requirements Communication and On-site Research (1–3 days)

After the project kicked off, the dedicated team—comprising a designer, construction engineer, and project manager—visited the client’s site to conduct a comprehensive survey. In addition to gathering insights into the lab’s area, structure, and functional requirements, the construction engineer also inspected on-site facilities such as water and electricity access points, ventilation shaft locations, and floor load-bearing capacity, ensuring these construction conditions are fully accounted for when developing the design and implementation plans.

2. Proposal Design and Review (Weeks 1–4)

Based on the research findings, the designer prepares a comprehensive plan that includes a "Functional Zoning Map + 3D Rendering + Construction Drawings + Cost Estimate." The construction engineer will review the feasibility of the construction drawings and provide optimization suggestions. Meanwhile, the project manager will carefully calculate the cost estimate to ensure it stays within the client’s budget. Once the plan is finalized, the team will hold a review meeting with the client, making adjustments and refinements based on the client’s feedback until the client gives final approval.

3. Materials and Equipment Procurement (1-2 weeks)

After the proposal was approved, the team initiated the procurement of materials and equipment. Nanjing Expansion Technology has established long-term partnerships with 30+ renowned suppliers. All purchased materials—such as laboratory bench tops, ventilation ducts, and cleanroom panels—as well as equipment like fume hoods and biosafety cabinets, are genuine factory products that meet national environmental protection and safety standards, backed by manufacturers' warranties. During the procurement process, customers will receive a "Procurement List and Samples" for review and confirmation before placing an order, ensuring that the materials and equipment align perfectly with their expectations.

4. Construction Work (Based on Area)

Before construction begins, the project manager will prepare a "Construction Organization Plan," outlining the construction team, schedule, and safety measures. During the construction process, the following principles will be strictly followed:

• Safety First: Safety warning signs are posted at the construction site, and workers wear protective gear such as hard hats and safety vests. Specialized personnel—like welders—are certified before taking up their duties.
• Civilized Construction: Arrange construction schedules reasonably to avoid noise that may disturb customers' normal work; daily remove construction waste to keep the site clean and tidy.
• Quality Control: Implement a three-tier quality inspection mechanism (self-inspection by construction teams → engineer re-inspection → company-level quality check), with a focus on inspecting concealed works and critical system quality.

5. System Debugging and Acceptance Testing (1–2 weeks)

After construction was completed, the team debugged all systems, including:

• Ventilation System: Test the fume hood's air volume, air velocity, and noise levels to ensure compliance.
• Hydropower system: Check the electrical circuit for proper power supply, verify water pressure and waterproofing in the plumbing system, and ensure there are no issues with electrical or water leaks.
• Purification System: Entrust a third-party testing agency to evaluate cleanliness, temperature and humidity, as well as pressure differentials, and provide a test report.
• Intelligent systems: Testing the accuracy and stability of temperature and humidity monitoring, gas leak alarms, and equipment operation status monitoring.

After debugging is approved, the team assists the customer in organizing the acceptance process, inviting both the customer and industry experts (if needed) to participate. Once the acceptance is successful, a "Acceptance Report" is issued.

6. Training and Delivery (1 week)

After acceptance is approved, the team provides training for the client's laboratory personnel, covering the following topics:

• Equipment operation: Proper usage methods for fume hoods, biosafety cabinets, and laboratory benches;
• System Maintenance: Includes tasks such as replacing ventilation system filters, operating water and electricity valves, and adjusting parameters for the intelligent system.
• Safety Emergency Response: Emergency procedures for incidents such as fires, chemical leaks, and biosecurity accidents.

After the training is completed, the team hands over all materials to the client, including design drawings, construction records, equipment manuals, inspection reports, acceptance reports, and more—marking the official delivery of the project.

III. The Three Major Advantages of One-Stop Contracting: Saving Customers Time and Costs

Compared to the traditional "design-plus-construction separation" model, Nanjing Tuozhan Technology's one-stop contracting service offers significant advantages in terms of time, cost, and quality:

1. Shorter duration: Reduce project timelines by 30%-40%

• Efficient phase coordination: Design and construction are seamlessly integrated—once the plan is approved, construction can begin immediately, eliminating the need for clients to wait while they source a construction team.
• Quick problem resolution: When issues arise during construction, the designer communicates directly with the construction team on-site and provides a solution within 24 hours, ensuring no delays to the project schedule.
• Parallel tasks: While the design proposal is under review, you can proactively begin preparing for the procurement of certain materials, thereby saving valuable procurement time.

In a university laboratory project, the traditional approach originally projected a construction period of 6 months. However, after adopting a one-stop contracting model, the entire process—from design to delivery—was completed in just 4 months, enabling the university to begin teaching and experimental activities two months ahead of schedule.

2. Lower Costs: Reduce total costs by 10%-15%

• Avoid rework costs: Collaborate between design and construction to minimize rework caused by impractical solutions, thereby saving on rework expenses.
• Procurement Cost Advantage: By collaborating with suppliers through centralized purchasing, the cost of materials and equipment is 10%-20% lower than if customers procure them on their own.
• Management cost savings: Customers only need to coordinate with a single point of accountability, reducing communication costs and minimizing management effort.

A certain enterprise's R&D laboratory project, initially budgeted at 1 million yuan, was completed under a turnkey contract at an actual total cost of just 880,000 yuan—resulting in savings of 120,000 yuan. Moreover, all expenses were fully transparent and tightly controlled, with no hidden costs whatsoever.

3. Superior Quality: Ensuring Compliance with Design and Standards

• Strong design implementation: The plan fully considers construction feasibility, avoiding "armchair planning";
• Full-process quality control: Designers are stationed on-site throughout the entire project to ensure construction strictly adheres to both the design drawings and national standards.
• Third-party testing: Key systems (such as purification and ventilation) are entrusted to third-party organizations for inspection, ensuring the accuracy and reliability of the data.

A certain biosafety laboratory project, constructed via a one-stop contracting approach, achieved Class 10,000 cleanliness standards as verified by third-party testing. Pressure differential control met the requirements of GB 50346-2011, and the facility successfully passed the acceptance inspection conducted by the National Center for Disease Control and Prevention on the first attempt.

IV. Application Scenarios for One-Stop Contracting

Nanjing Tuozhan Technology's "Lab Design + Engineering One-Stop Contracting" service is ideal for all types of laboratory construction projects, particularly suited for the following scenarios:

• For projects with tight deadlines—such as companies urgently needing laboratory facilities to support new product development, or universities required to complete lab renovations before the start of the academic year—
• For projects with high quality requirements—such as biosafety laboratories, cleanrooms, and medical testing laboratories—strict adherence to national standards and certification requirements is essential.
• For customers who want peace of mind and minimal effort: Customers lack experience in laboratory construction and prefer not to coordinate with multiple suppliers—instead, they’d like a professional team to handle the entire process from start to finish.

From design to construction, from material procurement to system debugging, Nanjing Expansion Technology offers a one-stop contracting service, providing customers with turnkey laboratory construction solutions. By choosing this model, clients don’t have to worry about the seamless integration of design and construction—or spend extensive effort coordinating among various parties—instead, they can simply wait for a laboratory that meets their expectations to be delivered.