8m tunnel specification
TRANSCRIPT
8/13/2019 8m Tunnel Specification
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Commitment, Quality, Design
TECHNICAL SPECIFICATIONS
AG Polytunnels 1 Dowles Cottage
Dymock Gloucester
Gloucestershire GL18 2AF
United Kingdom Tel No: 01531 890 675 Mobile: 07764 977 830
Website: www.agpolytunnels.co.uk Email: [email protected]
AG Polytunnels
8/13/2019 8m Tunnel Specification
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Snake clamps fix theridge firmly to thehoops
Steel frame is madefrom Z35 steel. (66%stronger than standardsteel tube). Galvanisedinside and out for long
life
Special brackets to
ridge rings to stopridge moving at endhoops
Timber to timber joins made with 2nail plates per joint
Timber Bracketfixing for timberto hoop
Choice ofhoop spacing
to provide100mph pluswind speeddesign
All foundation tubes are30% thicker than the mainframe to ensure strengthfrom the ground up
Either single orsplit corner braces
Swaged foundation
tubes – Alwaysused on the cornersand to all hoopswhen a base rail orside vent is fitted
Hoop to foundation tube locking
system with cover tensioningfacility – for all structures where'trench and bury' polythenefixing is used
Connections ofbraces to hoops(also lintel if steelend) via Q clips.Tek screws areused to preventslippage.
We recommend thatall tunnels areconcreted into theground.
Triangle brackets fix bracesto horizontal timber to Ali Gripends
Crop Bars increase strength by up to 10% forwind and 50% for snow load
End Frames, 100mm x 50mm
tanalised timber or steel and aluminium
General Tunnel Information
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Polybuild 8m (26' 3”) Polythene Tunnel
General Specification
Description Metric (M) Imperial (Nominal)A Width 8 26' 3”
B Height 3.5 11' 6”
C Vertical Side Height 1.1 3' 7”
D Door Height 2.2 7' 3”
E Maximum Door Width 6.8 22' 4”
GG Ground to Ground Over Hoop 12.4 41'
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Polybuild 8m (26' 3”) Polythene Tunnel
Frame Specifications
Hoop Spacings 1.25 – 2.5m
Wind speed 85mph with 2.5m or 110mph with 2m hoop spacing
Side Wall Clearance Headroom (Metric) Headroom (Imperial)
0.5m (20”) from Side 2.2 7'2”
1m (39”) from Side 2.6 8'6”
2m (78”) from Side 3.0 9'10”
Frame Information
Tube Size - Hoop 60mm x 1.5mm 2⅜”
Tube Size - Braces 50mm x 1.5mm 2”
Tube Size – Anchors(intermediate hoops for trench and bury) 50mm x 2.0mm 2”
Tube Size – Anchors(Corners and hoops with base rail)
60mm x 2.0mm 2⅜”
Tube Size - Ridge 50mm x 1.5mm 2”
Timber End (Standard) 100mm x 50mm 4” x 2”
Steel and Aluminium End 50mm x 1.5mm & Ali Grip Rail 2” & Ali Grip Rail
Doors
Good quality doors are important for ease of access, longevity and to save frustrations! Polybuild manufacturehigh quality doors as well as ventilation panels in either tanalised timber or galvanised steel.
Vent panels are pivoted on special plates and controlled with rope and cleat tie off with tower bolts to close.
Hinged Doors are complete with galvanised `T' hinges, handles, tower bolts, drop bolts and auto catches.
Sliding Doors are complete with heavy weight aluminium combined door track and drip proof heading, ballbearing wheels, bottom track, handles and stops
Timber DoorsDoor panels made from truss grade, planed and tanalised timber, 90mm x 40mm cross section, factory assembled(via mortise and tenon joints) and site clad with 'Correx' rigid polypropylene.
Timber framed vent panel 1.15m high x 2.3m wide.
Hinged timber doors 1.15m wide x 2.2m high
Sliding doors 1.15m wide x 2.2m high.
Steel Doors
Door panels made from box section 32 x 32 galvanised steel (hot dip galvanised after welding / manufacture), andfactory clad with 'Biolex' rigid PVC. Doors may also be clad using 10 mm thick polycarbonate top panels and
sheet steel bottom panels (or all polycarbonate panels)Single sliding door 1.20m wide x 2.25m high
Double sliding doors 2.40m wide x 2.25m high.
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Polybuild 8m (26' 3”) Polythene Tunnel
Options Available
Crop Supports Crop supports increase the wind speed strength by 10% and the snow loadstrength by 50%. 35mm x 1.5mm Steel tube
Side rails
Gutter side rail Aluminium side guttersTimber side rail 100 x 50 tanalised timber
Aluminium Grip Rail 'Hollow Box Ali-Grip'
Base Rails
Allows the side wall cladding to be fitted without 'trenching and burying'. The ends of the structure are fitted with a100 x 50 tanalised timber base rail/or 'Ali-Grip' profile rail.
Timber side rail 100 x 50 tanalised timber
Aluminium Grip Rail 'Hollow Box Ali-Grip'
Irrigation
Overhead irrigation (requires cropbars)
The polytunnel is fitted with a PVC overhead spray line system completewith PVC piping, suspension kit, pinjet nozzles, filters and drain valve.
Header Kits The spray lines are end/centre fed and are interconnected via a headermain with 1 hand valve per line and one main isolator valve.
Side Ventilation
Gutters along sides Aluminium side gutters
Timber side rail 100 x 50 tanalised timber
Aluminium Grip Rail 'Hollow Box Ali-Grip'
Polythene
This tunnel requires the following polythene for cladding:-11.1m wide for cladding to a side vent14m wide for 'trench and bury', base aluminium grip rail and timber base rail
Polythene Information
Clear Ultra violet inhibited clear polythene with a proportional 5 year life guarantee against prematurefailure
Politherm `Politherm AF' clear heat retentive and anti-droplet polythene with a proportional 5 year life
guarantee against premature failure
Luminance 'Luminance THB AF' polythene with a proportional 5 year life guarantee. Combines the benefits ofLuminance and Politherm AF (i.e. Heat retentive, anti condensation) but also gives a diffused lightto reduce scorch).
Nicotarp all white woven polythene.60% shade value.
FR PVC Polybuild's flame retardant, reinforced PVC, is anti-wicking, high Ultra Violet treated andfungicide treated
Anti Hot SpotTape
self adhesive tape to be fitted to each hoop and ridge(s) of the structure to increase the life of theroof cladding by up to one year. (Tape lasts 6/9 years)