Base Plate - Rectangle

Regular price
From $8.50
Sale price
From $8.50
Regular price
Shipping calculated at checkout.

Our base plate squares are available in a range of sizes (shown in mm).

Need a custom size?

Contact us

base-plate-rectangle

Product details

Our CNC machined aluminium base plates are designed to be welded to the bottom of an aluminium post or round tube and screwed to a concrete slab or timber deck. Made from high-durability aluminium at a heavy-duty 10mm thickness with pre-drilled mounting holes, each rectangular base plate provides a robust, reliable foundation.

Nelsons CNC base plates are made in-house on our CNC machining centres with precise accuracy to guarantee a perfect fit. All base plates are supplied in mill-finish aluminium.

Base Plate - Rectangle

Available Sizes

Search result not found!
x
100x80x10
SKU: 1008010BP
$11.00
Quantity Discount Price
1 0% $11.00
  • 1 0% $11.00
  • 50 15% $9.35
  • 100 20% $8.80
  • 500 25% $8.25
  • 1000 30% $7.70
x
120x50x10
SKU: 1205010BP
$8.50
Quantity Discount Price
1 0% $8.50
  • 1 0% $8.50
  • 50 15% $7.23
  • 100 20% $6.80
  • 500 25% $6.38
  • 1000 30% $5.95
x
120x80x6 - 3 Hole
SKU: 120806BP3H
$8.50
Quantity Discount Price
1 0% $8.50
  • 1 0% $8.50
  • 50 15% $7.23
  • 100 20% $6.80
  • 500 25% $6.38
  • 1000 30% $5.95
x
120x80x6 - 5 Hole
SKU: 120806BP5H
$8.50
Quantity Discount Price
1 0% $8.50
  • 1 0% $8.50
  • 50 15% $7.23
  • 100 20% $6.80
  • 500 25% $6.38
  • 1000 30% $5.95
x
130x80x10
SKU: 1308010BP
$12.40
Quantity Discount Price
1 0% $12.40
  • 1 0% $12.40
  • 50 15% $10.54
  • 100 20% $9.92
  • 500 25% $9.30
  • 1000 30% $8.68
x
120x100x8
SKU: 1201008BP
$13.00
Quantity Discount Price
1 0% $13.00
  • 1 0% $13.00
  • 50 15% $11.05
  • 100 20% $10.40
  • 500 25% $9.75
  • 1000 30% $9.10
x
120x100x10
SKU: 12010010BP
$15.00
Quantity Discount Price
1 0% $15.00
  • 1 0% $15.00
  • 50 15% $12.75
  • 100 20% $12.00
  • 500 25% $11.25
  • 1000 30% $10.50
x
150x50x10
SKU: 1505010BP
$9.00
Quantity Discount Price
1 0% $9.00
  • 1 0% $9.00
  • 50 15% $7.65
  • 100 20% $7.20
  • 500 25% $6.75
  • 1000 30% $6.30
x
150x100x10
SKU: 15010010BP
$17.00
Quantity Discount Price
1 0% $17.00
  • 1 0% $17.00
  • 50 15% $14.45
  • 100 20% $13.60
  • 500 25% $12.75
  • 1000 30% $11.90

Common applications for a rectangular mounting plate

Our precision-engineered aluminium base plates provide exceptional directional support for a variety of residential and commercial fabrication projects. Common uses for a rectangular base plate include:

  • Balustrades and Handrails — Maximising surface mounting area along narrow balcony edges and stairs without unnecessary overhang.
  • Boundary and Pool Fencing — Aligning perfectly with slimline framing to keep posts upright against continuous physical pressure.
  • Privacy Screening and Slat Fencing — Acting as a stable anchor for wide, horizontal screening panels that face high wind loads.
  • Commercial Walkways and Ramps — Securing handrails and grab rails flush against walls or transitions where space is highly restricted.
  • Awning and Carport Framing — Directing structural strength along the specific load lines of outdoor shade and shelter supports.

Additionally, to complete your installation and achieve a professional, weather-resistant finish for every project, it is essential to seal the exposed tops of your tubing. We recommend matching your rectangular base plate with our durable aluminium end caps to ensure a seamless visual line while fully protecting the internal structure of your posts from debris, pests and moisture.

Bring your vision to life with Nelsons CNC

Whether you are securing a rectangular mounting plate to a residential timber deck or welding components for a large commercial build, our team is here to support you. We take pride in our Australian-made quality and the uncompromising accuracy of our in-house machining. Every detail is handled with precision to ensure a perfect fit every time.

To discuss your specific project dimensions or custom requirements, speak with our fabrication experts today.

FAQs

Why choose a rectangular base plate instead of having posts go directly into the ground?

By using a heavy-duty rectangular mounting plate to surface-mount your posts to concrete footings or a timber deck, you create a far more durable, easily maintainable structure. Surface mounting also allows you to make precise adjustments during installation to ensure perfectly level posts.

What sizes are available, and how do you pick the right one?

Our standard range is engineered to suit a wide variety of structural layouts. Some of our common rectangular dimensions include:

  • 100mm x 80mm x 10mm
  • 120mm x 50mm x 10mm
  • 150mm x 50mm x 10mm
  • 150mm x 100mm x 10mm

To pick the right size, measure the external dimensions of your post to ensure it sits cleanly on the plate with sufficient room for the weld. Next, evaluate your substrate to ensure your pre-drilled fixing holes will align safely with the concrete edge or timber sub-frame without splitting the material.

Where / when is a rectangular mounting plate typically used?

A rectangular mounting plate is typically used when a standard square plate would overhang the mounting surface or cause an obstruction. It is ideal for installations where the anchoring space is narrow, such as thin retaining walls, along the edges of timber decks, or adjacent to existing walls. It is the perfect choice whenever you need to mount a slimline post flush against a boundary line.

Can I order a custom size or shape if my post/tube doesn’t match the standard sizes?

Yes. Because we control the entire manufacturing process on our own CNC machining centres in Australia, we can easily tailor our base plates to your specific design. Whether you require distinct hole configurations, non-standard dimensions, or different plate thicknesses, such as 6mm or 8mm, our fabrication team can manufacture a precise solution tailored to your custom specifications.

What’s the advantage of using a CNC-machined plate compared to cutting my own?

Hand-cutting or using manual tools to fabricate base plates often results in uneven edges, burrs, and slightly misaligned mounting holes. Our CNC-machined plates offer true right angles and perfectly flat surfaces, which makes your welding process fast and clean. Furthermore, every single plate is completely identical, ensuring consistent, high-quality results across your entire project.

nelsons

Aluminium End Caps
will finish off the job beautifully

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