Northern Polytunnels don't just make Polytunnels, we also offer Turnkey Solutions so that you can start growing from day one.
Crop Bars
It may seem like an obvious statement, but the more steel in the structure, the stronger it is. How much steel you need can depend heavily on the prevailing weather in your area. You can use the maps and tables on this page to check your average wind speed and snow load. This will help you to determine which kind of crop bar hangers you should choose; the “Inverted V” for lighter weather loading, or the sturdier “W-Hangers” for heavier weather loading, load bearing apparatus and crop support.
Formed from 50mm and 32mm diameter, Armour-guard coated steel tubing, our crop bars and hangers are just as strong and durable as the hoops they service. Not only do they pin the hoops together, they prevent lateral movement and joint loosening. When fitted with “W-Hangers”, they’re strong enough to carry direct loading. This is often seen in retail locations where large numbers of hanging baskets or planters are to be displayed. Crop bars also form the backbone of vital irrigation and air circulation systems as they are able to carry the additional load of water pipes, heaters and fans. Our crop bars are just another reason why Northern Polytunnels produce the most robust tunnels on the market, specifically designed to stand up to the worst that the British weather can throw at them.
Inverted V Crop Bar
W-Hangers Crop Bar
Benching
Our robust cost-effective benching system is modular meaning that its easily dismantled and reassembled to expand or reduce in size.
The benching comes as a flat pack which is easy to re-site or store when not in use.
The construction is based on our ArmourGuard 25mm diameter tube which has a magnesium zinc coating for years of rust-free life. Our specially designed corner and side fitting gives the bench its modular capability and strength. It is supplied with four corner bracing bars to give extra stability.
The bench top is a hot dipped galvanised mesh with a 3mm wire diameter and hole size of 25mm x 75mm.
Available in 1mtr wide and in multiples of 1.2m lengthways, allowing you to create a continuous bench to suit the length of your polytunnel or plant display area.
Specifications
- Width: 1.8m
- Height: 0.8m
- Length: Minimum 2.4m then multiples of 1.2m
- Main Frame: 25mm ArmourGuard fully galvanised
- Heavy Duty: 75mm x 25mm Steel mesh top (3mm diameter wire)
Staging
Our staging kits are a low cost solution where a full length bench is required for your Single Span polytunnel.
We ONLY provide the steel frame, leaving you to provide your own table-top. Some customers use heavy-duty, galvanised weldmesh, whereas others choose timber slats. Whatever your choice, our staging kits provide the ideal framework on which to grow your potted plants. Supplied with fasteners for fixing timber slats.
Our staging can be easily installed in new and existing polytunnels.
Overhead Irrigation Systems
NP overhead irrigation kits utilise the best components we can source including VDL valves and pipework, Netafim down tubes, anti-drip valves and nozzles giving high spray uniformity with minimal wasted water.
Our kit includes 30cm weighted down tubes, anti-drip valves and a nozzles/sprinkler specific to each width of greenhouse, twin 32 mm PVC spray-lines with PVC ball valves on each line, these are connected to a 50mm PVC header manifold with a drop pipe and connection for a Geka snap coupling.
All straining wires, tensioners and header brackets are included in the kit.
Sprinkler Performance
Each sprinkler is connected to a weighted 30cm down tube this allows the sprinkler to work in a true plumb position for optimum performance. These are connected to a pressure release anti drain valve, these prevent the water within the sprayline dribbling out after a watering period has ended, saving water and leaving the line ready and primed for the next use.
Ground Cover
With less than 5% light transmission, ground cover is an effective weed control fabric.
- Manufactured from black polypropylene (100gm/m2) with 25cm x 25cm green grid lines for accurate plant spacing.
- Optimum water permeability (15ltr/m2/second). Ideal for above-ground or below-ground applications.
- UV stabilised for long life.
- Colour: Black with green grid lines.
- Weight: 100gr/m² Light Transmission: Less than 5%
- Water Permeability: 15ltr/m²/second (EN ISO 11058).
- Grid Lines: 25cm x 25cm for accurate plant spacing.