Tianjin Yuantai Derun galvanized square tube frame cost
Tianjin Yuantai Derun's galvanized square tube frame cost
I. Core Cost Structure (Per Ton)
1. Material Cost (Approximately 70%-75%)
Square Tube Unit Price: According to market quotes, the tax-inclusive price for 80×80×3.75mm Q235B hot-dip galvanized square tubes is approximately RMB 3,900-4,000/ton. This price includes raw materials (Q235B strip steel), hot-dip galvanizing (zinc layer thickness ≥ 65μm), and basic processing costs (forming and welding).
Waste Control: In actual construction, it is recommended to allow for waste at a rate of 5%-8%, resulting in an actual usage of approximately 1.05-1.08 tons per ton, increasing the material cost to RMB 40,954,320/ton.
2. Processing Costs (Approximately 10%-15%)
Cutting and Welding: For custom lengths or complex joints, cutting costs are approximately RMB 50 per cut, and welding costs are approximately RMB 80 per meter. Taking a standard 6-meter pipe as an example, each ton requires approximately 16 cuts and 20 meters of welding, resulting in a processing fee of approximately 2,000 yuan/ton.
Special Processing: If drilling, bending, or other processes are required, the cost will increase by 300-500 yuan/ton.
3. Installation Costs (approximately 10%-15%)
Labor Costs: The installation fee for the steel structure frame is approximately 1,500-2,500 yuan/ton, depending on the complexity of the structure. For a medium-difficulty project, the installation fee is calculated at 2,000 yuan/ton.
Machinery Rental: If equipment such as cranes and welders are required, the cost is approximately 300-500 yuan/ton. This fee is negligible for smaller projects.
4. Transportation and Taxes (approximately 5%-10%)
Logistics Costs: Full truckload shipping from Tianjin to Liaocheng, Shandong costs approximately 5,080 yuan/ton, with LTL shipping fees increasing by 30%-50%.
Value-added tax: calculated at a tax rate of 13%, materials, processing and installation costs are all subject to taxation, and the comprehensive tax is approximately (materials + processing + installation) × 13%.
II. Comprehensive Cost Estimation
Using an 80×80×3.75mm Q235B hot-dip galvanized square tube frame as an example, the comprehensive cost per ton is as follows:
| Item | Cost Range (RMB/ton) | Remarks |
| Material Cost | 4095-4320 | Including 5%-8% loss, unit price 3900-4000 yuan/ton |
| Processing Fee | 2000-2500 | Cutting, welding, and simple processing; complex processes are charged separately |
| Installation Cost | 2000-2500 | Labor + machinery rental, medium difficulty project |
III. Key Factors Affecting Cost
1. Specifications and Materials
Wall Thickness Differences: For every 1mm increase in wall thickness, material costs increase by approximately 8%-12%. For example, a 100×100×5.0mm square tube costs approximately 150,200 RMB/ton more than a 3.75mm square tube.
Material Upgrade: Q345B is 200,300 RMB/ton more expensive than Q235B, and Q345D (20°C impact energy ≥34J) is 300,500 RMB/ton more expensive.
2. Surface Treatment
Hot-Dip Galvanizing: Conventional zinc coating (65μm) costs approximately 3,900 RMB/ton, while zinc-aluminum-magnesium coating (with 35 times greater corrosion resistance) costs approximately 4,430 RMB/ton, representing a 13%-16% increase.
Special Coatings: Fluorocarbon spray coating, electrophoretic paint, and other coatings cost approximately 500,800 RMB/ton and are suitable for highly corrosive environments.
3. Project Scale and Region
Bulk Purchases: Orders ≥100 tons receive a 5% to 8% discount. For example, square tubes priced at 4,000 yuan/ton can be reduced to 3,700 to 3,800 yuan/ton.
Regional Differences: Prices in North China (Tianjin and Hebei) are 50,100 yuan/ton lower than those in East China, while transportation costs in remote areas increase by 150,200 yuan/ton.
4. Design and Construction Requirements
Structural Complexity: The installation fee for complex structures such as trusses and grids is 50% to 100% higher than that for standard frames.
Schedule Requirements: Expedited projects are subject to a 10% to 20% rush fee, especially during peak steel season (March to May, September to November).
IV. Cost Examples for Typical Application Scenarios
1. Lightweight Steel Structure Factory (15-meter span)
Material: 100×100×4.0mm Q235B hot-dip galvanized square tubes, approximately 30 tons.
Cost:
Materials: 30 tons x 4,000 yuan/ton = 120,000 yuan
Processing: 30 tons x 2,000 yuan/ton = 60,000 yuan
Installation: 30 tons x 2,000 yuan/ton = 60,000 yuan
Transportation + taxes: 30,000 yuan
Total: 270,000 yuan (unit price approximately 900 yuan/㎡)
2. Outdoor Billboard Frame (10m Height)
Material: 80×80×3.75mm Q235B hot-dip galvanized square tube, approximately 5 tons.
Cost:
Material: 5 tons x 3,900 yuan/ton = 19,500 yuan
Processing (including punching and bending): 5 tons x 2,500 yuan/ton = 12,500 yuan
Installation (including crane): 5 tons x 2,500 yuan/ton = 12,500 yuan
Transportation + Taxes: 5,000 yuan
Total: 49,500 yuan (approximately 990 yuan/m2 unit price)
V. Practical Suggestions for Cost Reduction
1. Design Optimization:
Use standardized specifications (e.g., 6-meter fixed-length tubes) to reduce cutting losses.
Simplify joint design and prioritize bolted connections to reduce welding costs.
2. Centralized Procurement:
Cooperate with surrounding projects for bulk purchases to achieve price discounts of 5% to 8%.
Sign long-term agreements with manufacturers to lock in prices and mitigate the risk of steel price fluctuations.
3. Construction Management:
Rationally schedule construction to avoid the peak steel season (March-May, September-November).
Use prefabricated production to reduce on-site processing time and labor costs.
4. Material Substitution:
Cold-dip galvanized square pipes can be used for non-load-bearing structures, which are 10%-15% cheaper than hot-dip galvanized pipes.
In less corrosive environments, Q235B can be used instead of Q345B to reduce material costs.
VI. Acceptance and Payment Notes
1. Quality Acceptance:
Verify the material list, galvanizing test report (zinc coating thickness ≥ 65μm), and mechanical property data.
The measured weight deviation should be ≤ ±3%. For example, a single 80×80×3.75mm square tube (6 meters) should weigh ≥ 17.4kg.
2. Payment Method:
30% advance payment (covering material purchases), 80% progress payment based on completed volume, and a 5%-10% quality assurance deposit (payable after one year).
A 13% VAT special invoice is required to ensure legal deductions.
