Upload
northern-polytunnels
View
227
Download
4
Embed Size (px)
DESCRIPTION
We think it’s important to highlight the differences between our structures and those of our competitors. We want to tell our customers the reasons we manufacture and design our polytunnels the way we do. This comparison looks at the quality and reliability of the products used within the structures.
Citation preview
1
GARDEN STRUCTURESCompare us against the Competition
01282 873120
www.northernpolytunnels.co.uk
GARDEN STRUCTURESCompare us against the competition
2
3
About Us
At Northern Polytunnels we have been designing, manufacturing and constructing polytunnels for over 40 years. We have combined experince and knowlege that ensures you recieve the best quality polytunnel.
Why have we made this comparison? We think it’s important to highlight the differences between our structures and those of our competitors. We want to tell our customers the reasons we manufacture and design our polytunnels the way we do. This comparison looks at the quality and reliability of the products used within the structures.
Intro
Notes from our Structural EngineerAt Northern Polytunnels we have our own in-house team of design and construction engineers, our Struc-tural Engineer John has put together some notes which can be found on pages 8 and 9.
4
Northern Polytunnels First Tunnels Premier Polytunnels
Framework
Foundation Tubes
Heavy duty galvanised foundation tubes with a 3.5mm wall thickness to give increased protection from
corrosion.
Pre-galvinised steel tube with 1.5mm wall thickness
Pre-galvinised steel tube with 1.5mm wall thickness
Framework Tensioning SystemUp to 250mm of tensioning is available
by raising the hoops and locking into place
noneonly available when the cover is
trenched
Hoop Spacings 5ft or 6ft 5ft 5ft
Hoop Diameter 32mm 25.4mm 28mm
Number of Hoop Pieces(also see Storm Bars / Storm Stays)
2 4 3
Number of Struts / Stabilisers per end 2 2 2
Number of Pieces Struts / Stabilisers are supplied in
1 2 1
Strut / Stabiliser Bar Diameter 32mm 25mm unknown
Ridge Bar Diameter 32mm 25mm unknown
Crop Bars
Main Crop Bar Diameter 25mm 25mm unknown
Number of Crop Bar Hangers 0 0 0
Crop Bar Hanger Diameter n/a n/a n/a
Storm Brace Bars /Storm StaysNot Needed
(These are used to strengthen weakened point due to multiple hoop pieces.)
optional extra optional extra
Timber and Aluminium
End Timber Sizes 75mm x 40mm 47mm x 75mm 51mm x 76mm
Side Timber Sizes 75mm x 40mm 47mm x 75mm 51mm x 76mm
Base Rail Aluminium Section Sizes 37mm x 14mm 37mm x 14mm No aluminium option
Side Rail Aluminium Section Sizes 55mm x 14mm 55mm x 14mm No aluminium option
Fittings
Type of fittings used Purpose made commercial fittings U Bolts / Q clips / P Clips U Bolts / Q clips / P Clips
Polytunnel Covering
Polythene ManufacturerBpi. Visqueen - UK designed and manufactured for the UK climate.
www.bpivisqeenhort.comUnknown - Imported Unknown - Imported
Anti Hot Spot Tape manufacturer
We have used the same manufacturer for as long as the records date. It seems almost daily we get offers for tape that costs much less. However our tests have shown that the adhesive simply isn’t up to the job - so much so,
we have given up testing other suppliers and stick to what we know!
Unknown Unknown
Misc
Side Vent SystemGearbox operated steel tube with
spring clips to secure the polythene.
Gearbox operated steel tube with spring clips to secure the
polythene.
Manually roll a steel tube with spring clips to secure
the polythene
DoorsSliding doors as standard
manufactured from timber or aluminium
Hinged or sliding options, manufactured from timber.
Hinged only, manufactured from timber.
Single Door Sizes 0.9m (3ft) x 2m (6’6”) 0.7m (2’3”) x 1.8m (6’) 0.8m (2’8”) x height unknown
Compare us against the competition
8ft Polytunnel
Disclaimer. Every effort has been made to accurately reresent the products of our competitors at the time of going to print. The findings above are based on information that is widely available on the internet.We suggest all customers research these findings before purchasing their own Polytunnel and not base their decision on which supplier to select on the findings above.
Our steel work is High Tensile. Material certificated available on request.
5
Northern Polytunnels First Tunnels Premier Polytunnels
Framework
Foundation Tubes
Heavy duty galvanised foundation tubes with a 3.5mm wall thickness to give increased protection from
corrosion.
Pre-galvinised steel tube with 1.5mm wall thickness
Pre-galvinised steel tube with 1.5mm wall thickness
Framework Tensioning SystemUp to 250mm of tensioning is available by raising the hoops and locking into
placenone
only available when the cover is trenched
Hoop Spacings 5ft or 6ft 5ft 5ft
Hoop Diameter 32mm 25.4mm 28mm
Number of Hoop Pieces(also see Storm Bars / Storm Stays)
2 4 3
Number of Struts / Stabilisers per end 2 2 2
Number of Pieces Struts / Stabilisers are supplied in
1 2 1
Strut / Stabiliser Bar Diameter 32mm 25mm unknown
Ridge Bar Diameter 32mm 25mm unknown
Crop Bars
Main Crop Bar Diameter 25mm 25mm unknown
Number of Crop Bar Hangers 0 0 0
Crop Bar Hanger Diameter n/a n/a n/a
Storm Brace Bars /Storm StaysNot Needed
(These are used to strengthen weakened point due to multiple hoop pieces.)
optional extra optional extra
Timber and Aluminium
End Timber Sizes 75mm x 40mm 47mm x 75mm 51mm x 76mm
Side Timber Sizes 75mm x 40mm 47mm x 75mm 51mm x 76mm
Base Rail Aluminium Section Sizes 37mm x 14mm 37mm x 14mm No aluminium option
Side Rail Aluminium Section Sizes 55mm x 14mm 55mm x 14mm No aluminium option
Fittings
Type of fittings used Purpose made commercial fittings U Bolts / Q clips / P Clips U Bolts / Q clips / P Clips
Polytunnel Covering
Polythene ManufacturerBpi. Visqueen - UK designed and manufactured for the UK climate.
www.bpivisqeenhort.comUnknown - Imported Unknown - Imported
Anti Hot Spot Tape manufacturer
We have used the same manufacturer for as long as the records date. It seems almost daily we get offers for tape that costs much less. However our tests have shown that the adhesive simply isn’t up to the job - so much so,
we have given up testing other suppliers and stick to what we know!
Unknown Unknown
Misc
Side Vent SystemGearbox operated steel tube with
spring clips to secure the polythene.
Gearbox operated steel tube with spring clips to secure the
polythene.
Manually roll a steel tube with spring clips to secure
the polythene
DoorsSliding doors as standard
manufactured from timber or aluminium
Hinged or sliding options, manufactured from timber.
Hinged only, manufactured from timber.
Single Door Sizes 0.9m (3ft) x 2m (6’6”) 0.7m (2’3”) x 1.8m (6’) 0.8m (2’8”) x height unknown
Compare us against the competition
10ft Polytunnel
Disclaimer. Every effort has been made to accurately reresent the products of our competitors at the time of going to print. The findings above are based on information that is widely available on the internet.We suggest all customers research these findings before purchasing their own Polytunnel and not base their decision on which supplier to select on the findings above.
Our steel work is High Tensile. Material certificated available on request.
6
Northern Polytunnels First Tunnels Premier Polytunnels
Framework
Foundation Tubes
Heavy duty galvanised foundation tubes with a 3.5mm wall thickness to give increased protection from
corrosion.
Pre-galvinised steel tube with 1.5mm wall thickness
Pre-galvinised steel tube with 1.5mm wall thickness
Framework Tensioning SystemUp to 250mm of tensioning is available by raising the hoops and locking into
placenone
only available when the cover is trenched
Hoop Spacings 5ft or 6ft 5ft 5ft
Hoop Diameter 32mm 25.4mm 28mm
Number of Hoop Pieces(also see Storm Bars / Storm Stays)
2 4 4
Number of Struts / Stabilisers per end 2 2 2
Number of Pieces Struts / Stabilisers are supplied in
1 2 1
Strut / Stabiliser Bar Diameter 32mm 25mm unknown
Ridge Bar Diameter 32mm 25mm unknown
Crop Bars
Main Crop Bar Diameter 32mm 25mm unknown
Number of Crop Bar Hangers 2 0 1
Crop Bar Hanger Diameter 25mm n/a unknown
Storm Brace Bars /Storm StaysNot Needed
(These are used to strengthen weakened point due to multiple hoop pieces.)
optional extra optional extra
Timber and Aluminium
End Timber Sizes 75mm X 40mm 47mm x 75mm 51mm x 76mm
Side Timber Sizes 75mm x 40mm 47mm x 75mm 51mm x 76mm
Base Rail Aluminium Section Sizes 37mm x 14mm 37mm x 14mm No aluminium option
Side Rail Aluminium Section Sizes 55mm x 14mm 55mm x 14mm No aluminium option
Fittings
Type of fittings used Purpose made commercial fittings U Bolts / Q clips / P Clips U Bolts / Q clips / P Clips
Polytunnel Covering
Polythene ManufacturerBpi. Visqueen - UK designed and manufactured for the UK climate.
www.bpivisqeenhort.comUnknown - Imported Unknown - Imported
Anti Hot Spot Tape manufacturer
We have used the same manufacturer for as long as the records date. It seems almost daily we get offers for tape that costs much less. However our tests have shown that the adhesive simply isn’t up to the job - so much so,
we have given up testing other suppliers and stick to what we know!
Unknown Unknown
Misc
Side Vent SystemGearbox operated steel tube with
spring clips to secure the polythene.
Gearbox operated steel tube with spring clips to secure the
polythene.
Manually roll a steel tube with spring clips to secure
the polythene
DoorsSliding doors as standard
manufactured from timber or aluminium
Hinged or sliding options, manufactured from timber.
Hinged only, manufactured from timber.
Single Door Sizes 0.9m (3ft) x 2m (6’6”) 0.7m (2’3”) x 1.8m (6’) 0.8m (2’8”) x height unknown
Compare us against the competition
12ft Polytunnel
Disclaimer. Every effort has been made to accurately reresent the products of our competitors at the time of going to print. The findings above are based on information that is widely available on the internet.We suggest all customers research these findings before purchasing their own Polytunnel and not base their decision on which supplier to select on the findings above.
Our steel work is High Tensile. Material certificated available on request.
7
Northern Polytunnels First Tunnels Premier Polytunnels
Framework
Foundation Tubes
Heavy duty galvanised foundation tubes with a 3.5mm wall thickness to give increased protection from
corrosion.
Pre-galvinised steel tube with 1.5mm wall thickness
Pre-galvinised steel tube with 1.5mm wall thickness
Framework Tensioning SystemUp to 250mm of tensioning is available by raising the hoops and locking into
placenone
only available when the cover is trenched
Hoop Spacings 5ft or 6ft 7ft 6ft
Hoop Diameter 32mm 35mm 38mm
Number of Hoop Pieces(also see Storm Bars / Storm Stays)
2 4 4
Number of Struts / Stabilisers per end 2 2 2
Number of Pieces Struts / Stabilisers are supplied in
1 2 1
Strut / Stabiliser Bar Diameter 32mm 25mm unknown
Ridge Bar Diameter 32mm 25mm unknown
Crop Bars
Main Crop Bar Diameter 32mm 25mm unknown
Number of Crop Bar Hangers 2 0 1
Crop Bar Hanger Diameter 25mm n/a unknown
Storm Brace Bars /Storm StaysNot Needed
(These are used to strengthen weakened point due to multiple hoop pieces.)
optional extra optional extra
Timber and Aluminium
End Timber Sizes 75mm x 40mm 47mm x 75mm 51mm x 76mm
Side Timber Sizes 75mm x 40mm 47mm x 75mm 51mm x 76mm
Base Rail Aluminium Section Sizes 37mm x 14mm 37mm x 14mm No aluminium option
Side Rail Aluminium Section Sizes 55mm x 14mm 55mm x 14mm No aluminium option
Fittings
Type of fittings used Purpose made commercial fittings U Bolts / Q clips / P Clips U Bolts / Q clips / P Clips
Polytunnel Covering
Polythene ManufacturerBpi. Visqueen - UK designed and manufactured for the UK climate.
www.bpivisqeenhort.comUnknown - Imported Unknown - Imported
Anti Hot Spot Tape manufacturer
We have used the same manufacturer for as long as the records date. It seems almost daily we get offers for tape that costs much less. However our tests have shown that the adhesive simply isn’t up to the job - so much so,
we have given up testing other suppliers and stick to what we know!
Unknown Unknown
Misc
Side Vent SystemGearbox operated steel tube with
spring clips to secure the polythene.
Gearbox operated steel tube with spring clips to secure the
polythene.
Manually roll a steel tube with spring clips to secure
the polythene
DoorsSliding doors as standard
manufactured from timber or aluminium
Hinged or sliding options, manufactured from timber.
Hinged only, manufactured from timber.
Single Door Sizes 0.9m (3ft) x 2m (6’6”) 0.7m (2’3”) x 1.8m (6’) 0.8m (2’8”) x height unknown
Compare us against the competition
14ft Polytunnel
Disclaimer. Every effort has been made to accurately reresent the products of our competitors at the time of going to print. The findings above are based on information that is widely available on the internet.We suggest all customers research these findings before purchasing their own Polytunnel and not base their decision on which supplier to select on the findings above.
Our steel work is High Tensile. Material certificated available on request.
8
Notes from our Structural EngineerAt Northern Polytunnels we don’t leave anything to chance. We only use the highest grade materials in all of our polytunnels, on these pages our Structural Engineer John explains why.
1: Crop BarsCrop bars stiffen up the srtructure during strong winds. They can also help keep the legs tied together under heavy snow.We use large diameter, high tensile steel to ensure the structure remains rigid under both wind and snow loads.
2: FittingsCommercial grade, welded fittings help keep the Polytunnel rigid under high winds reducing wear and tear on the cover, as well as ensuring our tunnels remain how we design them to be.
3: BracingsAll our polytunnels are supplied with 32mm bracing to all corners.Providing large diameter, high tensile bracing in one piece ensures thepolytunnel stays rigid under high wind loads.
4: SteelworkAll our framework is manufactured from high tensile pre-galvinised steel to give a stronger structure. Our steel is typically 48% stronger than standard structural steel, with material certificates available on request.
9
5: Ground TubesWith ground tubes being in the ground, they are likely to be in contact with water for extended peiriods of time. We use heavier gauge ground tubes which are hot dip galvinised to reduce the chance of corrosion. Our ground tubes, with a wall thickness of 3.5mm use over 70% more steel than the frame work to ensure the foundations are as capable of withstanding the forces applied to them.
6: Doors and Door FramesWith sliding doors as standard, and a wide opening of 0.9m (1.8m for a double door), we offer much better value and quality than other manufacturers. In addition, each are constructed using supplied 90 degree brackets making it a very simple process.
7: Hoop SectionsMany other polytunnel companies will supply hoops in 3 and 4 piece’s due to transport restrictions. However, each joint within the polytunnel will create a weak point.
They provide ‘optional’ extra parts to strengthen these weak points. These extra parts are often referred to as ‘storm bars’. Using as few hoop sections as possible keeps the structure as strong as possible. This is why at Northern Polytunnels, we will ONLY supply hoops in 2 sections and our hoops DO NOT need ‘storm bars’.
Door Brackets
10
Northern PolytunnelsMill Green, Waterside RoadColne, Lancashire , BB8 0TA
Tel: 01282 873120Fax: 01282 871733