Home ​​​​>​​​​ Knowledge Center​​​​

How do you secure your crop wire?

When you produce vegetables you will most likely use high wire hooks. High wire hooks are used to bring the crop at the optimum working height and to connect the younger plants faster. These hooks are attached to the crop wire. When a glasshouse gets build or gets renovated these crop wires are attached horizontal through the greenhouse. The ends of the crop wire gets connected to the facade of the greenhouse. If something goes wrong during this process, it can lead to negative effects like the breaking of the wire, which causes damage to the crop. In this article our product specialist Martin Meuldijk will explain to you the right way to fasten your crop wire.
Fastening Crop Wire
Martin Meuldijk
Specialist Crop Rotation | June 22, 2020 | 4 min. reading time

Crop wire: choosing the right one

The first step is the choosing of the right crop wire. There are 2 types: galvanised wire or Crapal wire.
  • Galvanised wire: this is a galvanized wire. In most cases its used with a galvanised wire of 3.40 mm diameter. The breaking point of this thickness is about 450 kilos. 
  • Crapal wire: this is a galvanized wire with an alligation of 5 % aluminium. This wire is harder than a normal galvanized wire and also has an higher breaking point and corrosion resistance. In most cases, Crapal wire is used with a diameter of 3.15 mm. The breaking point at this thickness is about 590 kilos.

Attention points when attaching crop wire

Fixing the crop wire is a fairly simple task, but there are a number of issues that you should take in account to ensure that no damage or breaking occurs. Below we sum up the most important points of attention. 

Arch wire construction

For the attachment of the crop wire, you should use the arch wire connection set. It consists of two M12 turn buckles with assembled thimbles, two M16 wire clamps and 4 M6 wire terminals.
Crop Wire

Tensioning crop wire: how to do it

After attaching the wire clamps and turnbuckles on both sides of the glasshouse, you can stretch the wire between them. Use the following method:
  • Pull the thread through the thimble.
  • Twist the wire 5 to 6 strokes, without sharp bends.
  • Connect the wire firmly with two wire terminals M6. Put the first clamp as close to the thimble as possible. So that the wire cannot shoot out of the thimble. 
  • Please note that the turnbuckles are never fully turned in or out during the tensioning.
In this video, we show you how to attach the crop wire.
How to attach Crop Wire

Wire slack of the crop wire

It’s very important that the wire has enough slack. Keep a minimal slack of 20 centimetre and 25 centimetre with tomatoes. The slack is measured at the middle of a section. You can lower the wire with an wire lowerer. The wire lowerers are placed around the 5 metres post to post.
Related products
Contact form
Can't find your answer? Fill out the contact form and our specialist Martin Meuldijk will get back to you. On weekdays, even within 24 hours.

How do you secure your crop wire?

When you produce vegetables you will most likely use high wire hooks. High wire hooks are used to bring the crop at the optimum working height and to connect the younger plants faster. These hooks are attached to the crop wire. When a glasshouse gets build or gets renovated these crop wires are attached horizontal through the greenhouse. The ends of the crop wire gets connected to the facade of the greenhouse. If something goes wrong during this process, it can lead to negative effects like the breaking of the wire, which causes damage to the crop. In this article our product specialist Martin Meuldijk will explain to you the right way to fasten your crop wire.
Search in the Knowledge Center
​​​​​​​​Find answers to your question in our Knowledge Center. 600+ articles, written by our specialists.​​​​
Categories:
Martin Meuldijk Product Specialist Crop Rotation
Martin Meuldijk
Specialist Crop Rotation | June 22, 2020 | 4 min. reading time
Share this article
Fastening Crop Wire
Topics in this article

Crop wire: choosing the right one

The first step is the choosing of the right crop wire. There are 2 types: galvanised wire or Crapal wire.
  • Galvanised wire: this is a galvanized wire. In most cases its used with a galvanised wire of 3.40 mm diameter. The breaking point of this thickness is about 450 kilos. 
  • Crapal wire: this is a galvanized wire with an alligation of 5 % aluminium. This wire is harder than a normal galvanized wire and also has an higher breaking point and corrosion resistance. In most cases, Crapal wire is used with a diameter of 3.15 mm. The breaking point at this thickness is about 590 kilos.

Attention points when attaching crop wire

Fixing the crop wire is a fairly simple task, but there are a number of issues that you should take in account to ensure that no damage or breaking occurs. Below we sum up the most important points of attention. 

Arch wire construction

For the attachment of the crop wire, you should use the arch wire connection set. It consists of two M12 turn buckles with assembled thimbles, two M16 wire clamps and 4 M6 wire terminals.
Crop Wire

Tensioning crop wire: how to do it

After attaching the wire clamps and turnbuckles on both sides of the glasshouse, you can stretch the wire between them. Use the following method:
  • Pull the thread through the thimble.
  • Twist the wire 5 to 6 strokes, without sharp bends.
  • Connect the wire firmly with two wire terminals M6. Put the first clamp as close to the thimble as possible. So that the wire cannot shoot out of the thimble. 
  • Please note that the turnbuckles are never fully turned in or out during the tensioning.
In this video, we show you how to attach the crop wire.
How to attach Crop Wire

Wire slack of the crop wire

It’s very important that the wire has enough slack. Keep a minimal slack of 20 centimetre and 25 centimetre with tomatoes. The slack is measured at the middle of a section. You can lower the wire with an wire lowerer. The wire lowerers are placed around the 5 metres post to post.
Related products
Contact form
Can't find your answer? Fill out the contact form and our specialist Martin Meuldijk will get back to you. On weekdays, even within 24 hours.
Martin Meuldijk Specialist Crop Rotation
Also interesting for you
Which wire mesh do I need for my crops?
Wire mesh is normally stretched between the standard support materials: pillars with a ring at the bottom that are pushed into the ground in the greenhouse. We have a large assortment of wire mesh and supporting materials to support your crops.
How do I choose the right wire lowerer?
Many high vegetable crops such as tomato and cucumber are hung on high crop wires. It’s important that they are connected in the right manner and that they get enough support.

How do I pick the right twine?
Royal Brinkman has a big assortment in loose twines. The choice of the twine has to be based on the maximum weight of the plant en he amount of UV-light in the greenhouse.