Page 1.1.1 - Northern Polytunnels

GROUND TUBE PARTS LIST
ITEM QTY PART NUMBER DESCRIPTION
1 2 PER HOOP FR-SGLGT34 STANDARD GROUND TUBE
'X' =
'Y' =
8ft 10ft 12ft 14ft
5ft or 6ft - see order details
GROUND TUBES
ITEM 1
FIG. 1.1.1
DIAGRAM TO SHOW
GROUND TUBE SPACING
300mm
GROUND TUBE CENTRE LINE
COPYRIGHT © NP STRUCTURES
400mm
500mm
NOTES
· IT IS ESSENTIAL THAT THE GROUND TUBES ARE FITTED AS ACCURATELY AS POSSIBLE TO ENSURE
THE POLYTUNNEL IS CONSTRUCTED TO A SATISFACTORY STANDARD.
· MAKE SURE THE GROUND TUBES ARE INLINE AND SET TO A CONSTANT HEIGHT WITH ITS OPPOSITE
GROUND TUBE.
· INSTALL EACH CORNER AND RUN A BULDERS STRING AROUND THE PERIMETER TO AID WITH
INSTALLING THE INNER GROUND TUBES.
· CHECK THAT THE GROUND TUBES ARE SET AT 90° TO EACH OTHER BY MEASURING 300mm DOWN THE
LENGTH, 400mm ALONG THE WIDTH AND CHECKING THE RESULTING
MEASUREMENT BETWEEN THE TWO POINTS IS 500mm. THE DIAGONAL MEASUREMENTS SHOULD ALSO
BE EQUAL TO EACH OTHER.
EQUAL TO
OPPOSITE DIAGONAL
FIG. 1.1.2
DIAGRAM TO SHOW HOW TO MAKE SURE
THE GROUND TUBES ARE SQUARE
EQUAL TO
OPPOSITE DIAGONAL
SECTION 1.1 - STANDARD GROUND TUBES DRIVEN INTO THE GROUND
PAGE 1.1.1 - SETTING OUT
DR-HOBBYPOLY-1.1
VERSION 1.1

1
1
1
1
HAMMER
1
TIMBER
BLOCK
300mm
1
1
FIG. 1.1.3
FIG. 1.1.4
NOTES
· HAMMER EACH GROUND TUBE INTO
THE GROUND, USING A TIMBER BLOCK
TO PROTECT THE END OF THE TUBE,
TO APPROX. 300mm ABOVE GROUND.
COPYRIGHT © NP STRUCTURES
SECTION 1.1 - STANDARD GROUND TUBES DRIVEN INTO THE GROUND
PAGE 1.1.2 - GROUND TUBE INSTALLATION
DR-HOBBYPOLY-1.1
VERSION 1.1