Offset System - Installation Guide
'Offset' Brushwood Fencing Installation This simple, effective system using narrow width brushwood panels has been developed by ausbrush to allow one person installation and is especially suited for DIY and the handyman. Larger panels can also be used with this system using two persons to fit.
The 'offset' system described below is simple, effective and looks great. The framing has been designed specifically to provide a strong and rigid structure using commonly available fencing components. The method accommodates steel capping finishes or a brush rolled top, different fence heights and moderately sloping sites and tapers and can be married to pillars and other structures. Although ausbrush specifies a concrete base, other materials are often used such as timber, textured concrete sleepers, retaining and feature walls etc.
|Video Guide to Brushwood Panel Installation USING THE "OFFSET SYSTEM"|
the 'offset' framing system
See also our mail order DVD for an easy guide to both the "offset" method and the alternate 'inline' system using wider panels.
For situations demanding an alternative panel size, framing or finishing method, we would be happy to work through your design and endeavour to supply your requirements.
|The heart of the
"offset" system, the 1700mm high
brushwood fencing panels, are 1100mm wide, have a thickness options
of either 48 or 58mm and weigh around 35 to 40kg each.
Eight horizontal wires are used and the close wire clip spacing of around
75mm provides a
durable product that is easy to trim for length and height, on-site.
The 1700mm high standard brushwood panels' provide finished fencing heights of up to 1800 to 1900mm, depending on the type of base and top used. Non-standard panel sizes can also be made to order.
NEW: Now available raw panels in heights of up to 2120mm where additional overall fence height is required. Overall fence heights of around 2330mm using a 200mm high base can be achieved with the new panels which come in 2130mm high and widths of 1100mm, 1800mm, 2000mm, 2200mm and 2400mm.
See here for Roll-Top Installation Video
ie The same technique is used for fitting roll tops in both the offset and inline installation systems
Brush Roll-Top Finish
the finished fence
INSTALLING THE BASE AND POSTS - OFFSET INSTALLATION SYSTEM
Timber, concrete or steel bases can be used to stand the brushwood panel, the principal requirement being to keep the foot of the brushwork out of the soil as well as providing a stable straight support.
The base is offset to one side of the posts, with the panels fixed to the rails/frame behind.
The fitting of a concrete base is shown here, although just as popular are 4" x 2" timber rail bases, fixed to the post face just above ground level.
Posts, 2400mm long x 50mm x 50mm x 1.6mm thick galvanised steel, are set at the same height as the top of the brushwood panels after allowing for the height of the concrete base i.e. usually around 1800 to 1850mm above ground level for a 1700mm high panel. Great care should be taken in ensuring the top of the base is dead straight, or a series of straight-line segments. A string line is essential. Gently sloping fence lines and bases are fine as long as the top line of the base is straight i.e. the brush panels 'run' flush past the posts and the panels do not need to be trimmed to fit between them. On sloping sites the panels can be 'racked' in shape (distorted by dropping on one corner) to follow the 'lay of the land' up to a maximum slope of approx 1:4.
FITTING THE RAILS - OFFSET INSTALLATION SYSTEM
Posts and rails of any material can be used for the installation of brush fencing panels. However our standard 'offset' system uses 50 x 50mm square galvanised steel posts and 2200mm long x 25mm x 38mm x1.6mm (or 1.2mm) galvanised rectangular steel rails (sizes as used in the iron fencing industry).
'Three-hole-plate' brackets are fixed to the posts with 'tek' screws and the rails cut to fit between the posts and are fixed to the plates (also using tek screws). The front rail faces are set flush with the front face of the posts.
The bottom rail is fitted in line with the 3rd to bottom panel wire (540mm above the top of the base) so that the panels can be secured using hooks onto the running wire, fixing with tek screws through the panel from the front to the rail behind. The top rail can either be fitted in line with the top panel wire for similar fixing with screws or fitted above the top panel wire if the roll top is to cover the rail. In the latter case the roll top wires anchor and secure the panel and roll top to the rail rather than the panel top being screwed to the rail.
(with the alternative 'inline' installation system, no bottom rail is used in that case, as the panel wires tension around the posts at each end)
STANDING THE BRUSHWOOD PANELS - OFFSET INSTALLATION SYSTEM
Standing the 1100mm wide x 1700mm high brushwood panels in an off-set framing system prior to fixing with tek screws and hooks.
The panels can also be ordered and fitted as wider 1800mm or 2200mm wide panels requiring a two person install. Often the wider panels are wired and tensioned between the posts using the alternative in-line framing method instead.
The panels are seated on the base in a continuous line on the front side of the posts and secured to the bottom rail using 'Tek' screws and retaining hooks (two per panel).
FIXING THE BRUSHWOOD PANELS - OFFSET INSTALLATION SYSTEM
The brushwood panels are stood up one at a time and as each panel is placed the end wire staples are cut with snips and removed on the side where it meets the already fixed panel allowing the brush from each to marry at the join. After cutting the staples on the one panel edge only, the panel is shunted hard against the preceding fixed panel to minimize any gaps.
The panels are fixed to the frame bottom rail using 65mm long tek screws and utility hooks. Two screws per standard 1100mm wide panel are required to fix to the bottom rail. The hooks unobtrusively 'catch' hold of the third to bottom wire as the screws are driven through the panel from the front and into the bottom rail.
Depending on the top finish (brush roll top or steel 'colorbond' capping) an additional pair of screws/hooks per panel may be required to fix to the top rail as well. Where a brush roll top is fitted, the roll fixing wires are used to anchor the panel to the top rail, rather than using tek screws and hooks.
The panels are not fixed at the top until the last, when the top finish is applied.
JOINING THE PANEL WIRES - OFFSET INSTALLATION SYSTEM
After all brushwood panels are erected, prepared, butted and fixed in this fashion, the panel wires are then inter-connected by opening out the wire ends at the end of each panel and twisting together neatly. The brush is 'tapped' toward the conjunction and the wires adjusted to a straight and continuous line. For the best result, finished wires from one end of the fence to the other should be dead straight.
Next the exposed posts and bottom rails at the rear of the fence can be covered in brush rolls (or bottom rails painted/powder-coated prior to installation).
FITTING PRE-MADE BRUSH ROLL TOPS - OFFSET INSTALLATION SYSTEM
Ausbrush pre-made brush roll tops, which are blendable at the joins, are supplied in either 1800mm or 2200mm long sections to suit the panel sizes shipping and stack lengths. The tie down wires are included in the roll top design and folded underneath for shipping purposes. The roll-tops ship as a flat strip and comprise 5 mini cylinders of brush on the under side and flat finish on the other side.
Installation involves, unfolding the roll wires and bending the section over the top of the fence with the flat side up. It is best to use two people to install, one either side of the fence. A screwdriver is used to create a hole in the panel, through which a roll wire can be pushed to the operator on the other side, who draws the wire around through and to the top of the roll, where it is tied off.
Adjoining brushwood roll sections are butted together and can be blended seamlessly by dragging pieces of brush from the end of one roll into the other in the opposing directions, prior to securing the tie wires in the area of the join. The wires can be tensioned to give uniform shape and size to the roll and also fencing pliers can be used to 'tap' the roll into shape as you work.
An alternative cost saving method to using pre-made brush roll tops, is to fabricate brush rolls from panel pieces. A panel 2200mm wide will provide enough brush for approximately 20 metres of brushwood roll top using additional wire. Contact us for the further details of this procedure.
Finally a brush roll-top or steel capping is fitted. Note: where finishes other than brush roll top are used, the top rail may need to be relocated in line with a panel wire to allow fixing with tek-screws and hooks.
Machine made brush roll tops are manufactured in continuous lengths and are usually supplied in 1800mm or 2200mm long sections to allow ease of shipping/handling and placement.
Brush rolls can also be fitted by hand in the traditional manner from loose brush supplied in bundles.
Traditional Brush Roll Top Fitted by Hand
Brush roll-top wire-ties loop under the top-rail and bind the panel and brush roll to the rail thereby securing the panel top. With the alternative 'colorbond' steel capping finish, the capping is screwed to the frame and covers the top-rail and panel top.
'Colorbond' Capping Finish
If a steel base rather than concrete or timber is used, it can also be powder-coated or painted (prior to installation).
To get the maximum life out of your ausbrush panels it is advisable to follow our preferred installation methods.
See also our alternative "Inline" Install Method: Alternative methods can be used to fix and join panels. For example 2400mm wide panels can be supplied and fitted using the 'inline' system where panels are fixed in-line with the posts rather than offset to one side of the posts and only a top rail is used. The wires are tensioned around posts at either end using the extra long panel running wires and brush roll covers used over the posts. There is no frame showing on the rear side with this method and all that can be seen on either side is brushwork. Although the wider brush panels do not need to be connected to each other as in the "offset" method, handling and weight of these panels requires a two person installation, rather than the one person installation for the "offset" method using smaller panels.
For additional fence height options and "Inline" Install Method, see this page
Registered Trade Mark: #1086159
Factory/Warehouse: 38 to46 Barndioota Rd Salisbury Plain, SA,5109
Copyright: Ausbrush Panels, Last Updated June 2013