OEM/ODM custom manufacturing · Q235B / Q355B · 16–30 mm · Hot-dip galvanized optional
Our flange base plate is a square or rectangular steel plate with pre-drilled anchor bolt holes around the perimeter, used to anchor steel columns securely to concrete foundations. Built from Q235B / Q355B with descaling and primer as standard, it provides a stable, level base for your structure.
Flat plate with pre-drilled anchor bolt holes positioned around the perimeter.
Two material grades to balance cost and structural performance.
Heavy plate gauges sized for substantial column loads.
Descaling plus rust-preventive primer as standard; hot-dip galvanized optional.
Steel plate cutting, drilling, leveling and deburring for precise fitment.
Outer size, thickness and bolt hole diameter produced to your drawings.
All parameters can be customized to your drawings or samples.
| Parameter | Common Specification |
|---|---|
| Product Name | Flange Base Plate / Steel Structure Base Plate / Column Base Plate |
| Material | Q235B, Q355B |
| Plate Thickness | 16 mm, 20 mm, 25 mm, 30 mm |
| Shape | Square/rectangular flat plate, pre-drilled anchor bolt holes around perimeter |
| Common Outer Size | 200×200 mm, 300×300 mm, 400×400 mm, 500×500 mm |
| Bolt Hole | Dia. 17.5 / 22 (for M16, M20 anchor bolts) |
| Surface Treatment | Descaling + rust-preventive primer; hot-dip galvanized optional |
| Application | Bottom base of steel columns, anchored and fixed to concrete foundation |
| Manufacturing Process | Steel plate cutting, drilling, leveling, deburring |
| HS Reference Code | 7308900000 |
300 pcs per specification (negotiable for trial orders and new customers).
Wooden case or steel pallet with galvanized or anti-rust protection — export sea-freight standard.
Typically 15–25 days after order confirmation, depending on quantity and specification.
Tell us the outer size, thickness, bolt hole diameter and quantity. Drawings are welcome — we reply within 24 hours.
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