Ipe joists foundation for decking size 4.0 x 6.0 cm
Ipe Hardwood Joists for a Stable Decking Subframe
Substructure of Ipe WOOD in size 4 x 6 cm
substructure from ipe wood with foundation piles
Substructure on stilts with floor boards Ipe WOOD
4underlying beams and picket
Ipe joists foundation for decking size 4.0 x 6.0 cm
Ipe Hardwood Joists for a Stable Decking Subframe
Substructure of Ipe WOOD in size 4 x 6 cm
substructure from ipe wood with foundation piles
Substructure on stilts with floor boards Ipe WOOD
4underlying beams and picket

Ipe Hardwood Subframe Joists 40 x 60mm | For Decking Frameworks

High-quality product with a luxurious look

Per item
Quantity pieces
Discount
Price
Stock
Total amount
Ipe 4.0 x 6.0 cm - 3.00 m1 Subframe Joist | Ipé Beams 40 x 60mm - Ipe 4.0 x 6.0 cm - 3.00 m1
£ 47.50
£ 41.45
£ 47.89 per unit
£ 41.79 per unit
716 pieces
£ 0.00
new
Beams > Planed beams
Total (incl. discount)
0
£ 0.00
£ 0.00
Sharp prices
Lengh 3.00m
 Smooth planed
 Eased edges

Decking Calculator
In just 5 clicks

Delivery time: In stock | All-in-one kit delivered to your door

Product | Technical Specifications | Installation

The Indestructible Foundation for Your Luxury Decking
A premium patio deck is only as strong as the framework beneath it. Our heavy-duty Ipe hardwood subframe joists (40 x 60mm) provide the ultimate, rock-solid foundation for high-end exterior projects. Boasting durability class 1, these structural timber beams are engineered to withstand direct ground contact and moisture. Because they share the exact same natural expansion and contraction rates as Ipe decking boards, they eliminate mechanical stress on your fixing screws. Invest in a straight, warp-free sub-structure built to carry your deck safely for the next 25+ years.

The Stable Base: Ipe Subframe Joists 40 x 60mm

A deck is only as strong as its foundation. For a patio built from Ipe decking boards, these 40 x 60mm Ipe subframe joists are the only correct choice. Why? Because they share the exact same contraction and expansion rates as the Ipe decking boards themselves. This prevents mechanical stress on the screws and guarantees a perfectly straight deck for the next 25+ years.

Boasting durability class 1, these joist beams are fully rated for direct contact with the ground and moisture, which is absolutely vital for the subframe construction of any outdoor patio deck.

Assembly & Load Capacity

The 40 x 60mm dimension is the industry standard for a stable decking subframe. For the finest results, we recommend following these trade guidelines:

  • Joist Spacing: Place the Ipe subframe joists at a maximum center-to-center (c-to-c) spacing of 40cm to ensure a bounce-free decking surface.
  • Fasteners: Use our stainless steel (SS) decking screws. Due to the exceptionally high density of Ipe timber, we always advise pre-drilling to ensure a splinter-free installation.
  • Foundation: Combine these joist beams with Azobé hardwood foundation posts for an indestructible ground support network.

The Best Subframe for Your Ipe Decking Boards

For a high-end patio deck finished with premium Ipe decking boards, choosing the right subframe joist is critical. Our hardwood Ipe beams fall into durability class 1, matching the decking boards themselves. This ensures that the entire structural frame shares an identical lifespan of 25+ years. The recommended, solid size configuration is 40 x 60mm.

Utilising matching Ipe subframe joists beneath Ipe decking boards prevents the sub-structure from rotting away before the patio surface does, which is essential to secure the structural integrity of your build.

Correct Installation for a Stable Ipe Deck

A stable deck starts with the correct spacing margins between the joists. When working with 21mm thick Ipe decking boards, we recommend a center-to-center (c-to-c) layout span of no more than 40 to 45cm.

  • Prevent Bending: Maintaining tight joist spacing ensures your Ipe boards will not spring, bounce, or warp under load.
  • Optimal Air Ventilation: The joist framework creates the required airflow cavity beneath the decking boards, which is crucial to minimize natural wood expansion and contraction.
  • Pre-Drilling: Always use our specialized decking screws with a built-in drill point for a splinter-free connection in dense Ipe timber.
  • Drive foundation support posts into the ground alongside your subframe joists and secure them together. We advise installing a minimum of 2 foundation posts for every linear metre of subframe joist run.

Foundation Post >

Subframe joists of Ipe wood secured to foundation posts providing a stable base

 View Ipe Decking Boards Range >

Stainless Steel Screws for Ipe Hardwood

Ipe contains natural organic compounds that can corrode standard hardware screws. Therefore, we advise exclusively using our tested stainless steel (SS) decking screws in combination with your Ipe subframe joists and boards.

  • Concealed Finish: Opt for our black-coated hardware screws which hide seamlessly within the shadows of the decking board expansion gaps.
  • Product Warranty: Using our approved structural fixing materials secures your full factory product warranty on all Ipe decking boards.

The estimation tool computes your needed subframe bills of materials automatically. Use our online decking calculator to instantly compute the correct volume of Ipe subframe joists, screws, and matching Ipe decking boards required for your footprint, automatically accounting for cutting waste.

Open Online Decking Calculator >

Written by Tom Wegter (team leader IT) and Marc Westerhuis (team leader communications) at Hardwood Discount· last updated: 3 October 2026· Facebook · Instagram · YouTube · Pinterest

Order private or business?

Ipe Hardwood Specialist for the UK, for Private Individuals & Professionals Are you looking for the highest quality Ipe hardwood for a luxury decking, fence or façade? As an Ipe specialist, we deliver directly from our own stock to both private individuals and business customers. Our passion for sustainable hardwood is reflected in our product selection. Seeing is believing: order a free sample box online to experience the quality for yourself.

Fast & hassle-free delivery: We deliver your order quickly to your home or directly to the construction site. Our lorries are equipped with a forklift truck, allowing our drivers to unload independently at any safe, accessible location. Guaranteed quality: Thanks to our tightly coordinated logistics process, we check every plank for quality and completeness before it leaves our premises.

Ordering for business? Extra benefits for professionals! Are you a landscaper, contractor or carpenter? Take advantage of exclusive benefits such as: Up to 10% extra discount (from the 3rd order onwards). Direct delivery on site, save time and transport costs.
Order directly from the source, because we are a wood importer and producer in one, so we keep prices sharp and quality high. All deliveries are dispatched from our own stock. In the UK our dealer in Hartlepool has a showroom with our decking and fencing.

Business registration

Assembly | Processing | Reviews
Strong and durable

All our products are actually in stock. Therefore we can deliver super fast. We indicate the stock position of each product. This is a "live" and actual stock. Delivery in 7 to 14 working days

All garden wood products

Free delivery on orders over £4,300.

Steel doors are all made to measure, with a delivery time of approximately 8 weeks. Oak or Douglas barns, verandas or shelters are all made to measure, for which the delivery time is approximately 8 weeks. We deliver all products with a large truck. All products are well packed in plastic so that they are weather resistant. Read the warranty terms and conditions before placing your order. It is important to know what you can make with our products and it is equally important what not to do. As a result, you will enjoy your home-made project for longer. We only provide warranty if you have fulfilled all the warranty conditions. Do not use floor boards near a swimming pool that contains chlorine or salt water. Fixing materials are made of stainless steel (clips and screws) the chlorine and salt attack the stainless steel, causing corrosion. There is a greatly increased risk that the mounting clips and screws will corrode and break as a result. As a result, the wood is no longer clamped and will spontaneously start to work and deform. Read the warranty conditions carefully before purchasing. Our dealer in Hartlepool has a showroom where you can see our decking and fencing.

Read more installation tips

Delivery | delivery time