Treated vineyard poles (H4V) – The new CCA Class for Vinyard Poles – NO LONGER AVAILABLE

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Note: This treatment class (H4V) is no longer for sale.

There has been a lot of controversies affecting the CCA Treated poles and droppers industry of late. One of the major issues is various suppliers not advising their customers (Mainly farmers using treated vineyard poles and droppers) of the right rules and regulations. Furthermore, they are not advising them as to what specific class they need for the purpose that they are purchasing.

Due to this, we as members of the NRCS (The National Regulator for Compulsory Specifications) feel that it is our obligation to inform you about the correct rules, regulations, and classes.

You will find all the aforementioned information in this blog post.

What do the different classes in treated timber mean?

When it comes to the application (use) of the treated poles, you need to look at different factors. You need to look at the strength, length and width of the timber you are going to use. Additionally, when using the treated timber you will have to look at the CCA class of your timber and which one you will need.

The purpose for which the timber is being bought will determine the treatment required to ensure maximum performance. The South African Wood Preservation Association (SAWPA), together with the SABS established hazard classification for the treatment of wood. These hazard classification treatments change according to the application of the wood.  The chemicals need not penetrate to the same depth, nor the solutions be the same. Therefore, these two factors are retention and penetration levels, respectively.

Various classes include :

  • H2 – Internal (Laminated Beams, Roof Trusses, Structural Timber, Ceiling Boards, Flooring, Paneling, Doors. Cupboards, Skirting, Window frames, Plywood

  • H3 – External Above Ground ( Outdoor decking and beams, Garden furniture, Laminated beams, Weatherboard, Cladding etc.)

  • H4 In Ground Contact ( Agricultural posts, Landscaping structures, Playground structures, Fencing, Pergolas, Carports, Flower boxes, Decking, Bridges, Stakes, Garden Edging, Transmission Poles, Treated vineyard poles and droppers etc.) 

  • H4V – In Ground Contact, Heavy Duty, specially Designed for Vineyards (Agricultural posts, Special heavy duty Poles perfectly suitable for the farming Industry. The H4V class was designed to last longer than a normal H4 class pole.) 

  • H5 – In Fresh Water / Wet Soils (Piling, Retaining Walls, Slipways, Culverts, Groynes, Flood Gates, Jetties, Drains, Walkways etc. )

  • H6 – In Sea Water (Piling, Retaining Walls, Slipways, Groynes, Jetties, Walkways

Why H4V is always required for treated vineyard poles and droppers:

As you can see in aforementioned information, class H4V is required when using treated timber and droppers for application of “In-Ground Contact”. Therefore class H4V is the class you use when planting treated vineyard poles and droppers.


The H4V class is a fairly new product, an upgrade on the H4 class to be more robust. This level of treatment helps prevent agricultural posts from rotting and termite attack. It was specially designed for agricultural application and lasts longer because of the durability. Special attention was given to create a treatment class that could extend the lifespan of the wood more as well as to make it safe to use in the agriculture industry. The H4V Class is now the industry standard when erecting vineyards.


Class H4V treated timber will allow you to get the most out of your purchase.  The treated poles can withstand the conditions of a vineyard due to the fact that the treatment is specific for it’s application. When treating the timber the application is kept in mind to ensure that the timber is the correct quality.

To ensure that their vines’ growth is well ventilated, vineyard rely heavily on treated poles.

Main Reasons for treated timber poles and structures in a vineyard :H4V Vineyard Treated Poles

  • Keep new shoots, canes, and fruit off the ground
  • To maximize air and sunlight to vines.

If you do not have these support structures in place on your vineyard, you will most probably suffer great losses with rotting fruits and your vines growing slower than expected.

There are two types of vine support structures: A vertical or Horizontal trellis.

Vertical Trellis with Treated vineyard poles (H4V)

A vertical trellis uses two wires, one about one meter above ground and one about two meters above ground. This always for good ventilation between the vines. The H4V Treated poles will be the perfect support structure to attach these wires to.

Horizontal Trellis with Treated vineyard poles (H4V)

A horizontal system uses three wires. For trunk support, one wire attaches to the post about 1 meter above ground. By attaching two parallel wires horizontally to the ends of 1,2-meter long cross arms secured to poles 2 meters above ground, you hold the canes in place.

If you use timber that is not properly treated you can end up with vineyards literally falling apart because of termites and rot. That is why it is essential that you use the correct materials for setting up the structures for your vineyards. Make sure your poles are H4V CCA

(Contact us to find out if your poles are up to standard)

Rules and regulations regarding Treated vineyard poles and droppers

All treated timber must adhere to SABS rules and regulations of SABS 457-2, SABS 457-3, SABS 673 and more.

To guarantee the highest quality treated timber, all treated timber suppliers must adhere to SABS’ rules and regulations. SABS regulates all it’s members strictly to make sure that they are adhering to the proper safety instructions etc.

Vineyard treated poles and droppers Here are some rules and regulations stipulated by SABS (when it comes to H4V treated timber poles) :

  • The average moisture content of timber immediately before preservative treatment should not exceed an average of 300 g/kg.
  • Untreated hardwood requires protection during seasoning and storage by the application of a suitable timber protectant.
  • Only treat timber that is free from the following: precipitated water, dirt, other contaminating substances, rot and insect attack.
  • Stacking timber correctly in the treatment tank so that the preservative liquid has free access to all facets.You can find out more about SABS rules and regulations from their website:

Where can one buy SABS and NRCS approved treated poles and droppers?

At Sabie Poles, we treat our timber products according to all SABS, SAWPA  and  NRCS rules and regulations.

That’s why when you buy from us, you know you’re getting the real thing.

We Sell quality treated timber and deliver all over South Africa. Our product range includes:

Quality CCA Treated Poles sizes sold at Sabie Poles:

  • 50/75mm diameter in lengths starting at 1.2m (with 300mm increments to 8.4m
  • 75/100mm diameter in lengths starting at 1.2m (with 300mm increments to 10m)
  • 100/125mm diameter in lengths starting at 1.2m (with 300mm increments to 15m)
  • 125/150mm diameter in lengths starting at 1.2m (with 300mm increments to 15m)

CCA Treated Droppers sizes:

  • 32/50mm diameter in lengths 1.2m (With 300mm increments to 3m)

CCA Treated Lathes sizes:

  • size: 32/50mm diameter in lengths 2.7 (with 300mm increments to 30)

    Sabie Treated Vineyard Poles and droppers

How do you know whether your supplier is the real deal?

It is important that you ensure that your supplier is registered with all the regulatory boards if you are looking for treated vineyard poles. Suppliers will have no problem supplier you with the necessary documentation and certifications if they are registered.

Unregulated suppliers may have hazardous consequences

So always make sure you ask the following questions when purchasing treated vineyard poles and droppers:

  1. Are your treated vineyard poles and droppers SABS approved?
  2. Are you apart of (SAWPA) South African Wood Preservers Association? 
  3. Does your treated vineyard poles and droppers comply with the NRCS’ (National Regulator for Compulsory Specifications) rules and regulations? 

If they answer yes to all of the above-mentioned questions, you can still call each institution to inquire whether or not they are in fact members.

Why is it important that all suppliers abide by standard rules and regulations?

When buying from a supplier it is important to note that if their products are not approved by these institutions the timber can be hazardous to people’s health. Different chemicals can start leaching out of the timber consequently it can become harmful to people and animals.

To ensure that your treated vineyard poles and droppers are not hazardous is vital that the timber is treated following the correct procedures. This also ensures protection against harsh weather conditions and insect attacks.

That is why we encourage you to inquire with your supplier whether or not they have all the necessary certifications. It is also your duty as a citizen to report any businesses that are not compliant with the rules and regulations. NRCS deals with these businesses accordingly therefor you can contact them regarding any issues with complying of the law.

Contact Details:

SABS (South African Bureau of standards)  –  012 428 7911 or email them on

SAWPA (South African Wood Preservers Association) – 011 974 1061 or email them on

NRCS  (National Regulator for Compulsory Specifications) – 012 482 8700

Vineyard Treated poles and droppes

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