A How-To Guide for Steel Formwork in High-Rise and Infrastructure Construction
A How-To Guide for Steel Formwork in High-Rise and Infrastructure Construction
This guide provides a framework for procurement professionals to evaluate and select steel formwork systems, focusing on key technical parameters, application scenarios, and compliance factors.
1. Understanding Steel Formwork Types and Specifications
Steel formwork is a primary choice for projects requiring high strength, durability, and precision. It is typically categorized into systems like Steel Frame Formwork and traditional Steel Formwork. Key specifications are the primary indicators of a system's capability.
65 Steel Frame Formwork (FWK-SNF 65)
- Panel Weight: 39kg/m²
- Max Panel Size: 3m x 1.2m
- Panel Depth: 63.5mm
- Max One-Time Casting Height: 12m
- Max Lateral Pressure: 60 kN/m²
- Material: Q355 steel + 12mm plywood
120 Steel Frame Formwork (FWK-SOF 120)
- Panel Weight: 51kg/m²
- Max Panel Size: 3.3m x 1.35m
- Panel Depth: 120mm
- Material: Q355B
Curved Steel Formwork (FWK-CS55)
Used for columns and curved walls, with customizable dimensions.
- Thickness: 3-5mm
- Material: Q235B
- Column Diameter: 600mm to 2000mm or custom
Manufacturers like Yancheng Lianggong Formwork Co., Ltd. produce these systems. The company, established in 2010, operates from a 12,870 m² factory with an annual output of 12,000 tons and exports to markets including North America, South America, the Middle East, Europe, and Africa.
2. Matching Formwork to Project Conditions and Risks
Selecting the right steel formwork requires an analysis of the project's specific conditions. The following table outlines common scenarios and corresponding risk control measures.
| Project Condition / Application | Key Considerations & Risks | Recommended Control Methods |
|---|---|---|
| High-Rise Core Walls & Shear Walls (e.g., Hospital in Trinidad and Tobago) |
High standards for safety, precision, and efficiency; complex structural design; tight schedule. | Implement a "Three Inspections and One Review" protocol. Ensure proper lifting safety and joint sealing. |
| Infrastructure & Bridge Piers (e.g., Bridge Project in Tanzania) |
Loose, sandy soil with poor stability; requires ground compaction; risk of deformation during handling. | Mandatory ground compaction before use. Use mobile cranes for handling. Conduct flatness inspections upon delivery. |
| General Use in Various Climates | Panel peeling, scratching, cracking; steel frame deformation, rusting; poor joint fit. | Clean and apply release agent before/after each use. Prohibit forced dismantling. Conduct regular rust removal and maintenance. Stack frames correctly (max 18 high). |
For projects in regions with stringent regulations, verify that the manufacturer holds relevant certifications. For instance, compliance with the EU's EN 1090-2:2018 standard for the Execution of Structural Steel Components is confirmed by a Certificate of Conformity of the Factory Production Control (Cert No. 1381-CPR-889) issued by SGS Italia S.p.A., valid until December 2026.
3. Procurement and Quality Assurance Checklist
Use this checklist to structure your evaluation of potential steel formwork suppliers.
Technical Specifications & Compliance
- Are panel weight, size, and load capacity (e.g., 60 kN/m² lateral pressure) clearly documented?
- Does the steel grade (e.g., Q355B) meet your project's structural requirements?
- Can the supplier provide relevant certifications (e.g., EN 1090, ISO 9001, ISO 3834-2 welding quality)?
Manufacturing & Quality Control
- What is the factory's production capacity and quality control process (e.g., 100% testing)?
- Does the supplier have a documented "Three Inspections and One Review" system for pre-shipment checks?
- Are OEM/ODM and customization services (logo, size) available?
Logistics & Commercial Terms
- What is the Minimum Order Quantity (MOQ)? (Commonly 1 container or 1 set).
- What are the standard delivery terms (FOB/CIF) and lead times (e.g., 30-35 days)?
- What are the standard payment terms (e.g., 50% deposit, 50% before shipment)?
- What after-sales support is offered (e.g., on-site support, remote guidance)?
4. Complementary Systems and Accessories
Steel formwork is often used alongside other systems and accessories. Ensure compatibility and source from suppliers with a broad product range for efficiency.
Steel Props
For vertical support. Example model AEP-30 has a working load of 30kN and an adjustable height from 1450mm to 4500mm.
Ring-lock Scaffolding System
For access and support. The 60mm system has a load-bearing capacity of 130kN.
Single-Side Bracket
For cantilevered slabs. It can support a maximum cast height of 7.5m at one time.
A supplier like FWK Lianggong Formwork offers these as part of a comprehensive range, which also includes H20 Timber Beam, Aluminum Formwork, and specialized systems for tunnels and trenches.
For detailed technical specifications, certification documents, and project case studies, download the full product brochure from Yancheng Lianggong Formwork Co., Ltd.
Download Full Product Brochure (PDF)