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Steel Base Plates
Steel Post Base Plates — Weld-on & Bolt-down
Post base plates for square and round steel posts — supplied loose for you to weld, or welded to your post section, with bolt holes positioned to suit your fixings.
- Supplied asLoose plates, or welded to your post section
- Post typesSquare/rectangular hollow section, round tube, angle or flat bar
- HolesTwo, four or custom bolt patterns; drilled or plasma cut; optional drain hole
- MaterialsMild steel or stainless steel
Made to order · Price on application · One-offs and batch quantities
REQUEST A QUOTEor call 0151 547 1221For posts that bolt down instead of concreting in
A post base plate lets you bolt a steel upright to a slab, wall or deck rather than setting it in concrete. Retail plates come in a handful of sizes; ours are cut to suit the post you're actually using and the fixings your installer prefers.
We supply plates loose, ready for you to weld, or as a finished assembly with your box section or tube welded centrally to the plate with a continuous fillet weld.
Sized to your post and fixings
Tell us the post section (for example 50×50, 75×75 or 100×100 SHS, or a tube diameter), the plate size, and the bolt hole size and spacing. If you need the plate offset for a post near a wall, or a hole in the centre to drain the post, we'll cut that too.
Typical jobs include fence and gate posts, handrail and barrier posts, signage posts, canopy and shelter uprights, and equipment stands.
A note on load
We make post base plates to your drawing. For posts that carry structural, wind or barrier loads, the plate thickness, weld size and anchor specification should be set by your designer.
Technical information
| Supplied as | Loose plates, or welded to your post section |
|---|---|
| Post types | Square/rectangular hollow section, round tube, angle or flat bar |
| Holes | Two, four or custom bolt patterns; drilled or plasma cut; optional drain hole |
| Materials | Mild steel or stainless steel |
| Welding | MIG or TIG, continuous fillet weld around the post |
| Finish | Supplied bare; coating options discussed at quotation |
Materials
- Mild steel
- Stainless steel
Processes
- CNC plasma cutting
- Drilling
- MIG/TIG welding
Customisation
- Plate size and thickness
- Post section and length
- Centred or offset post position
- Hole size, number and spacing
- Optional gussets
Applications
- Fence and gate posts
- Handrail and barrier posts
- Sign and lighting posts
- Canopy and shelter uprights
How to order
Send your drawing (DXF, DWG or PDF) or a dimensioned sketch with the material, thickness and quantity. We'll check it, ask about anything unclear, and reply with a price and lead time. Once approved, parts are made in our Knowsley workshop for collection or UK delivery.
Questions we're often asked
Can you supply the post as well?
Yes — we can cut the section to length and weld it to the plate. Give us the section size and the overall height.
Can I order plates only?
Yes. Loose plates are cut and drilled ready for you to weld on site or in your own workshop.
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Need steel post base plates?
Send your drawing or sketch and we'll come back with a price and lead time.