Otter Fencing can provide a full range of galvanised pipe in stock lengths and cut to length fence posts and rails. The product is sold in galvanised form for Standard Galvanised fences and powdercoated form for PVC coated fences

Posts/pipe used for Chainwire fencing under the australian standards are available in 3 grades:

  • Medium
  • Medium/light
  • Medium/extra light

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Fences are specified in the Australian Standards as:

  • Class 1 – Medium quality designed for improved durability and life for fencing for long term security purposes such as for government departments and councils.
  • Class 2 – Medium/Light designed for industry for medium to long term security purposes such as industrial and commercial installations.
  • Class 3 – Medium/Extra Light designed for short term security purposes such as domestic and light duty industrial and commercial.

Corner, strainer and end posts shall be 50nn DN/NB and excavated to a minimum depth of 750mm. Intermediated posts shall be 40mm DN/NB and excavated to give a minimum depth of 600mm

Intermediate Posts

Intermediate posts are fence posts positioned at regular, equally spaced intervals between corner, terminal and gate posts to provide support for the chainwire mesh. Where specified by the purchaser, posts may have extensions provided above the top level of the mesh for the attachment of barb wire.

Intermediate posts are usually equally spaced at 3.3m centres (AS 1725.1-2010) or as specified by the purchaser. It is not unusual for security fencing to have posts specified at 4m centres.

The intermediate barb extensions may be straight or if required, bent at 45° and protruding at 90° to the fence line – see opposite. The barb wire is usually secured on the external side of the posts, however with cranked extensions, the local council may insist that the posts are set back so the extension does not protrude into public space if facing away from the property.

Corner Posts

Corner posts are fence posts at a corner or change of direction and provide support for the chainwire mesh to be strained off. Because corner posts are used to strain chainwire, cable wires and barb wire (when used), they need to be supported sufficiently with a horizontal bracing strut, diagonal bracing stay or top rail. Where specified by the purchaser, posts may have extensions provided above the top level of the mesh for the attachment of barb wire.

The Corner post barb extensions may be straight or if required, bent at 55° if the extension is facing outwards and set at 45° to a 90° corner – see opposite. If the cranked extension is at 45° to the fence line, then the barb spacings will vary, by being spaced out further. For a typical 150mm barb spacing, the cranked corner post spacing will be 212mm.

The barb wire is usually secured on the external side of the posts, however with cranked extensions, the local council may insist that the posts are set back so the extension does not protrude into public space if facing away from the property.

End Posts

End posts are fence posts used as a terminal post on a fence line and provide support for the chainwire mesh to be strained off. Because End posts are used to strain chainwire, cable wires and barb wire (when used), they need to be supported sufficiently with a horizontal bracing strut, diagonal bracing stay or top rail. Where specified by the purchaser, posts may have extensions provided above the top level of the mesh for the attachment of barb wire.

Strainer Posts

Strainer posts are fence posts used as an intermediate strainer post on a fence line and provide support for the chainwire mesh to be strained off. They typically are specified over and above a normal specification and are often spaced at intervals of 150m on straight lengths. Because Strainer posts are used to strain chainwire, cable wires and barb wire (when used), they need to be supported sufficiently with a horizontal bracing strut, diagonal bracing stay or top rail. They are braced in both directions in line with the fence – see below right. An alternative is the bracing panel, consists of 2 strainer posts, rail & cable wire and turnbuckles – see below left.

Gate Posts

Gate posts usually are used in pairs to frame a gateway. Gate posts at the end of a fence run provide support for the chainwire mesh to be strained off. Because Gate posts are used to strain chainwire, cable wires and barb wire (when used), they need to be supported sufficiently with a horizontal bracing strut, diagonal bracing stay or top rail. Where specified by the purchaser, posts may have extensions provided above the top level of the mesh for the attachment of barb wire.

The gate post barb extensions may be straight or if required, cranked (50mm bent, 80mm cut & welded) at 45° and protruding at 90° to the fence line. If the gate post has cranked barb extensions, the gate frame barb supports always remain straight otherwise the cranked extension would hit the post’s cranked extension when opening the gate – see opposite.

The barb wire is usually secured on the external side of the posts, however with cranked extensions; the local council may insist that the posts are set back so the extension does not protrude into public space if facing away from the property.

Bracing Stays & Rails

Bracing stays and bracing rails are fitted to all corner, end, intermediate strainer and gate posts unless specified otherwise or there is a top rail fitted. Because these terminal posts are used to strain chainwire, cable wires and barb wire (when used), they need to be supported sufficiently with a diagonal bracing stay or horizontal bracing rail.

Back Stays

Back stays are fitted when specified to intermediate posts at 90° to the fence line. They are generally spaced at a specified number of intermediate posts e.g. every 5th intermediate post. There is also the option to use them on gate posts where the gates are large and the posts require additional support to carry the weight or when otherwise specified. When used on gate posts, they are fitted at 60° to the fence line angling away from the gate opening back along the fence line. This allows the gate to open more than 90°.

Galvanized Pipe & SHS

The list of Galvanized pipe & SHS below represents Otter Fencing’s standard available stock range. All pipe diameters and pipe grades listed meet the various requirements of the Australian Standard – Chain-link Fabric Security Fences and Gates (AS 1725 2010).

All Galvanized pipe & SHS listed below are sold in full lengths, however Otter Fencing has a fully equipped engineering workshop and is able to offer value add processing such as: cutting, bending, punching, welding, capping and powder coating, available upon request to transform the full lengths of Galvanized pipe & SHS into fence and gate posts and gate frames to suit any job.

Galvanized Pipe Standard Available Stock Range

Nominal Bore NB (mm) Outer Diameter OD (mm) Length (m) Extra Light Galv. Wall Thickness (mm) Light Galv. Wall Thickness (mm) Medium Galv. Wall Thickness (mm) Lengths Per Sling Metres Per Sling (m)
20 26.9 6.5 2.0 2.3 127 825.5
25 33.7 6.5 2.0 2.6 3.2 91 591.5
32 42.4 6.5 2.0 2.6 3.2 61 396.5
40 48.3 6.5 2.3 2.9 3.2 61 396.5
50 60.3 6.5 2.3  2.9 3.6 37  240.5
65 76.1 6.5 3.2 3.6 37 240.5
80 88.9 6.5 3.2 4.0 19 123.5
100 114.3 6.5 4.5 19 123.5
150 165.1 6.5 5.0 10 65.0

 

Product Description Dimension (mm) Length (m) Finish
100mm Square Galvanized Straight Plain Length 100x100x3mmSQ 8.0 M Galvanized
Curved Drop Down Rail (3000mm high x 900mm high) 32mm NB 6.5 M Powder Coated
Curved Drop Down Rail (3600mm high x 1200mm high) 32mm NB 6.5 M Powder Coated
Elsco Galvanized Plates 200x150x6mm 8.0 M Galvanized