Permanent Canopy
> Erecting Net (Click to see Powerpoint)
> “To net or not to net” (Click to see PDF file)
This is a Queensland DPI publication by Peter Rigden. It illustrates different ways of using netting and some of the pitfalls.
These nets are designed to be permanently in place, they are heavier than the throwover nets and therefore more expensive.
The conventional way to erect this kind of netting is to first erect a structure using 6 or 7.5mm cable. These structures should be signed off by a structural engineer as the forces generated by wide expanses of net in high winds can be very high and the design will be affected by local factors such as the terrain and the holding power of the ground.
A wire is then inserted into the reinforced edge of the net, the net is then clipped to the cable using specially designed clips. These clips should be placed at intervals such that they will fail before the net or the structure, so if there is an extreme event such as a cyclone you don�t lose everything and the netting can be re-clipped. The spacing of the clips will depend on the porosity of the net used and the tension it is strung at, again sound engineering advice is recommended.
The 21 meter nets have internal selvedges so they can be cut along their length to produce narrower netting. The 21M quad has one internal selvedge so it can be cut into two 10.5M nets. The 21M no cross net has two internal selvedges at 5M and 7M from each edge, This net can produce 5M, 7M, 9M, 14M and 16M widths.
(Click on each images to enlarge)
