Triangle Connecting Plate/Delta Plate
The triangle connecting plate, also called a tri-plate or delta plate, is the junction fitting in a mooring system where chain, wire and accessories meet. It is cut and drilled from alloy or high tensile strength steel, and…
What This Product Is For
The triangle connecting plate, also called a tri-plate or delta plate, is the junction fitting in a mooring system where chain, wire and accessories meet. It is cut and drilled from alloy or high tensile strength steel, and supplied hot dip galvanized or black tarred, in capacities running from 5 ton up to 250 ton.
Key Benefits
- Triangular geometry spreads load across three connection points instead of one shackle eye
- Capacity range from 5 ton to 250 ton covers light rigging through to offshore mooring
- Hot dip galvanized or black tarred finish for permanent immersion or deck exposure
- Precise cutting and drilling so shackle pins seat correctly in every hole
Problems It Solves
- Multiple lines meeting at a single shackle and loading it out of plane
- Stress concentration at a connection under extreme tension
- Coating failure at a permanently immersed junction point
Application Scenarios
- Junction point in anchor chain and mooring systems
- Mooring rigging where chain meets wire or synthetic line
- Shipbuilding and offshore project connections
- Construction lifting assemblies under high tension
Who It Is For
- Offshore mooring contractors
- Shipyards and marine fabricators
- Heavy lifting and rigging contractors
Technical Features
- Triangular plate geometry for stress distribution
- Material alloy steel, high tensile strength steel or stainless steel
- Finishing hot dip galvanized or black tarred painting
- Precise cutting and drilling of connection holes
Specification Table
Values below are taken from our own product data. Where a figure is not published for this item, we confirm it against your order rather than estimating it.
| Material | Alloy steel, high tensile strength steel |
|---|---|
| Finishing | Hot dip galvanized, black tarred painting |
Customization Options
- Capacity specified across the 5 ton to 250 ton range
- Alloy, high tensile or stainless steel material
- Hot dip galvanized or black tarred finish
Quality Control
- Hole position and diameter checked against the drawing
- Material grade verified at intake
- Coating inspected before dispatch
Photographs Of This Product
How It Compares With The Alternatives
Compared with D type joining shackle
A joining shackle connects two chain ends in line, the delta plate is used where three or more lines come together
Compared with Pear shaped end shackle
The pear shackle terminates one chain end, the delta plate distributes load across several connections
How To Use And Maintain It
- Size the plate against the highest line tension it will carry, not the average
- Match shackle pin diameters to the drilled holes
- Specify hot dip galvanizing for permanently immersed positions
- Inspect hole edges for wear during mooring inspections
What We Need From You To Quote
- Size or diameter, and the grade if it is specified
- Quantity and packing format
- Surface finish for the environment it works in
- Classification society, if a certificate is required
- Destination port for freight
Triangle Connecting Plate/Delta Plate FAQ
What is a triangle connecting plate also called?
It is known as a triangle plate, tri-plate, delta plate or pad eye.
What capacities are available?
Capacities run from 5 ton up to 250 ton.
Which materials do you use?
Alloy steel, high tensile strength steel or stainless steel.
What finishes are available?
Hot dip galvanized or black tarred painting.
Where is it used?
As a connector in anchor chain systems, mooring rigging, shipbuilding, construction lifting and offshore projects.
Can you make it to our drawing?
Yes. The plates are cut and drilled to the connection layout you specify.
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