Hot-Dip Galvanized Twisted Flat Steel Strap
The twisted flat steel strap is a custom-fabricated connection component for utility-pole, overhead-line and general infrastructure hardware assemblies. It is manufactured from a continuous carbon-steel flat bar with a locally formed twist that changes the orientation between its two connection sections.
This configuration allows two components located in different mounting planes to be connected without welding separate plates together. Depending on the approved design, the strap may be supplied with one or more punched mounting holes and different twist angles, end profiles and overall lengths.
The photographed sample is handwritten as 4 × 40 × 450 mm. This marking appears to indicate a nominal thickness of 4 mm, width of 40 mm and overall length of 450 mm. These values must be verified by physical measurement or an approved drawing before publication or production.
Important: This is a project-specific pole-line ironwork component rather than a universally standardized electrical fitting. Its final application, hole arrangement, mechanical capacity and installation position must be determined from the complete assembly drawing.
Key Features
- One-piece carbon-steel flat-bar construction
- Locally twisted section changes the mounting orientation
- Available with 90-degree or project-specific twist angles
- Punched or drilled mounting-hole options
- Hot-dip galvanized finish available for outdoor applications
- Suitable for customized utility-pole and overhead-line assemblies
- Thickness, width, length and hole spacing can be customized
- Manufactured according to customer drawings or approved samples
Typical Technical Specifications
| Product Type | Twisted Flat Steel Strap |
|---|---|
| Product Category | Pole-Line Strap / Mounting Strap / Connection Ironwork |
| Sample Size | 4 × 40 × 450 mm, subject to measurement and drawing confirmation |
| Base Material | Carbon-steel flat bar |
| Construction | Continuous one-piece steel strap with locally twisted section |
| Twist Angle | 90° typical or customized according to drawing |
| Hole Configuration | One hole, two holes or customized |
| Hole Diameter | According to the mating bolt and approved drawing |
| Surface Finish | Hot-dip galvanized or zinc plated, subject to order confirmation |
| Manufacturing Process | Cutting, punching, twisting, forming, deburring and galvanizing |
| Application | Utility-pole hardware, crossarm assemblies and project-specific support connections |
| Customization | Material, thickness, width, length, twist angle, hole size, coating and marking |
The specification shown above is based on the handwritten sample marking and visual inspection. Final production data must follow the approved technical drawing.
Function and Structure
The main purpose of the twisted section is to change the orientation of the connection surface. For example, one end may be attached to a horizontal plate while the opposite end connects to a component positioned in a vertical plane.
The strap remains a continuous steel component through the transition area. The twist length and forming radius should be controlled to avoid cracking, excessive thinning or sharp deformation in the load-transfer section.
Available Configurations
- Single-hole or double-hole ends
- Same-size or different-size end holes
- 45°, 90° or customized twist orientation
- Straight, offset or widened end sections
- Square, rounded or chamfered end profiles
- Hot-dip galvanized or project-specified coating
- Stamped model number or customer identification
Typical Applications
- Utility-pole mounting assemblies
- Overhead distribution-line ironwork
- Crossarm and bracket connections
- Stay and support assemblies
- Transformer and equipment mounting structures
- Telecommunications pole hardware
- Custom infrastructure and fabricated-steel connections
The exact application cannot be determined from the loose component alone. Installation must follow the complete assembly drawing and engineering requirements.
Manufacturing Process
- Select the specified carbon-steel flat bar.
- Cut the material to the required blank length.
- Punch or drill the mounting holes.
- Form the local twist and any required offset sections.
- Remove burrs and sharp edges.
- Inspect dimensions, twist orientation and hole position.
- Apply the specified zinc coating or hot-dip galvanized finish.
- Perform final appearance, dimensional and packaging inspection.
Quality Inspection
- Material grade and flat-bar size verification
- Overall length, width and thickness inspection
- Hole diameter and hole-position inspection
- Twist angle and orientation inspection
- Visual inspection for cracks, sharp edges and harmful deformation
- Galvanized coating appearance and thickness inspection
- Mechanical testing when required by the approved drawing
- Marking, quantity and packaging inspection
Reference Standards
- ISO 1461:2022 – Hot-dip galvanized coatings on fabricated iron and steel articles
- GB/T 13912 – Hot-dip galvanized coatings on fabricated steel articles
- Applicable utility-pole construction drawings
- Customer material, dimensional and mechanical specifications
IEC 61284 should only be referenced when the product is treated as a load-bearing overhead-line fitting and its test requirements are included in the approved contract. Reference to a standard does not constitute certification.
Ordering Information
Please provide the following information when requesting a quotation:
- Approved drawing or complete sample dimensions
- Steel material grade
- Flat-bar thickness and width
- Overall length
- Twist angle and twist direction
- Hole quantity, diameter and center distance
- Required surface treatment and coating thickness
- Required mechanical load or test method
- Marking, quantity and packaging requirements
Frequently Asked Questions
What is the purpose of the twisted section?
The twist changes the orientation between the two mounting sections, allowing components positioned in different planes to be mechanically connected.
Is 4 × 40 × 450 mm a standard size?
It is the handwritten size on the photographed sample. It should be treated as a sample specification rather than a universal industry standard.
Can the twist direction be changed?
Yes. Clockwise, counterclockwise and other project-specific orientations can be produced according to the approved drawing.
Can different hole sizes be supplied?
Yes. Hole quantity, diameter, shape and center distance can be customized to match the required bolts and adjoining components.
Is this an electrical current-carrying fitting?
It is normally a mechanical structural component rather than an electrical conductor. Its exact function must be confirmed from the complete pole-line assembly.
