Flat Plate Connection Sleeve
Flat Plate Connection Sleeve
Precast Concrete Embedded Fastener Product Brochure
1. Product Introduction
Flat Plate Connection Sleeve (Also known as Embedded Flat Base Sleeve or Weld Embedded Part) is an indispensable core fastening component in Precast Concrete (PC) elements. This product is typically made of high-strength seamless steel tubes precisely welded with Q235B carbon steel base plates (or embedment plates), featuring a surface treatment of Hot-dip Galvanizing or Electro-galvanizing for corrosion resistance.
During the manufacturing of precast components, it is accurately pre-embedded in the formwork. The exposed cylindrical stud/post, combined with the internal threaded hole, provides a highly stable mechanical connection point for adjacent precast wall panels or enables rapid clamping with steel formwork systems on-site. With its evenly distributed stress and high pull-out resistance, it serves as the"invisible joint"for modern industrialized and modular construction.
2. Product Parameters & Specifications
| Parameter Category | Typical Specification / Range | Description |
|---|---|---|
| Material | Tube / Stud: High-quality Seamless Steel Tube Base: Q235B Carbon Steel Plate | High-strength base material ensures reliable connection load capacity |
| Surface Treatment | Electro-galvanizing / Hot-dip Galvanizing / DACROMET | Customizable to adapt to different corrosion environments |
| Thread Specification | Standard Metric Thread, covering M12, M16, M20, M24 | Non-standard customization available |
| Base Plate Dimensions | Common square bases: 50×50mm to 150×150mm Thickness: 3mm to 8mm | Size and thickness customizable based on load requirements |
| Stud Height | Standard range: 20mm to 100mm | Customizable based on panel thickness |
| Load-bearing Capacity | Yield and tensile strength comply with GB/T 3098.1 standard Design pull-out force per piece: 5–15kN | Specific value varies by product specification |
3. Installation & Usage Instructions
3.1 Factory Pre-embedding
At the precast plant, secure the base of the sleeve in the pre-drilled holes on the mold (typically aluminum or steel formwork) using dedicated magnetic seats or tie wires. Ensure the stud is perfectly perpendicular to the panel surface.
3.2 Concrete Pouring
Proceed with normal rebar tying and concrete pouring. Once cured, the sleeve will be firmly anchored to the concrete surface, forming a robust base.
3.3 On-site Connection
Panel-to-Panel Connection
After positioning the adjacent wall panels with a crane, insert high-strength bolts or through-bolts rods through the internal threads of the connecting sleeves on both panels, and tighten with nuts to achieve a rigid connection of the shear wall.
Formwork Fixation
Serve as a connection point for tie rods or support points for the formwork system, cooperating with steel scaffolding to resist lateral pressure during concrete pouring.
4. Applications & Precautions
4.1 Applications
- Connection of splicing joints in precast concrete shear wall panels (interior/exterior walls)
- Temporary or permanent connections for precast stairs and composite floor slabs to the main structure
- Tie rod and support systems for steel formwork on precast construction sites
- Adaptor connections between curtain wall steel structures and precast concrete bases
4.2 Precautions
- Precise Positioning: During pre-embedding, dedicated positioning molds must be used to prevent displacement of the sleeves during concrete vibration, ensuring installation accuracy.
- Anti-blocking & Cleaning: In harsh site environments, it is recommended to fit plastic protective caps (dust caps) on the top of the studs to prevent concrete slurry or debris from entering the threaded holes.
- Load Capacity Verification: Overloading is strictly prohibited. During the project design phase, the pull-out and shear capacity of each sleeve must be calculated by a structural engineer in accordance with the Technical Specification for Precast Concrete Structures.
- Corrosion Protection: In coastal high-salt fog or chemical corrosion environments, upgrading to Hot-dip Galvanizing (≥45μm) or DACROMET surface treatment is recommended, with regular inspections of the thread engagement.
5. OEM & ODM Customization Services
Supported by advanced automated welding production lines and CNC machining centers, we provide highly flexible customized solutions for global clients:
5.1 OEM (Original Equipment Manufacturing)
Supports drawing/sample-based processing. We strictly adhere to client-specified material standards (e.g., ASTM, EN) and surface treatment specifications, providing customized factory QC reports.
5.2 ODM (Original Design Manufacturing)
Non-standard Customization
Undertakes the R&D and production of special specifications such as shaped bases (round, oval, race-track shaped), stepped studs, and left-hand threads, right-hand threads, and reducing threads combinations.
Complete System Supply
Offers one-stop supply solutions including"Sleeves + High-strength Bolts + Magnetic Positioning Bases + Protective Caps"to streamline your supply chain.
