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PermaTimber®
FENCEDESIGNGUIDE
Create the perfect fence with the PermaTimber® Fence Design
Guide.
V.2019.1
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FENCE DESIGN GUIDE
PERMA FENCE™ BY PERMATIMBER®
Made from a hard wearing, durable composite timber, Perma Fence™
by PermaTimber® is the perfect way to add a touch of style to your
home or commercial project. A wide range of colours, accessories
and configurations have been engineered and are available to suit
any type of installation.
A Configuration to Suit Every OccasionWith Perma Fence™, you
have the option of using a visible or hidden post configuration for
strength and stability.
Visible Post Configuration
Post spacing and footing size will vary depending on the wind
speed at the installation location.
Components Required: 9 Perma Fence™ Panels 9 Bottom / Top Rail 9
Single Post 9 Single Post Caps 9 Intermediate Posts 9 Intermediate
Post Caps 9 Corner Posts (Optional) 9 Corner Post Caps
(Optional)
Hidden Post Configuration
Post spacing and footing size will vary depending on the wind
speed at the installation location.
Components Required: 9 Perma Fence™ Panels 9 Bottom / Top Rail 9
Single Post 9 Single Post Caps 9 Steel Inserts 9 Corner Posts
(Optional) 9 Corner Post Caps (Optional)
Footi
ng D
epth
Footing Diameter
End PostCas
Top Rail
WPC Fence Panel
Middle Post Cap
End Posts
Middle Posts
End PostCaps
Bottom Rail
Middle Post Cap
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Mansour Ahamed
Fence Assembly (Middle Posts)
07 / 12 / 2018
DRAWING NUMBERDATE
PD-014-04-00-0001-RB07/12/18
FOR APPROVALXX/XX/XX -
PAGE
1 OF 2
N:\Artwork\Logos - Do Not Move\Perma
Composites\Logo-and-tagline-CAD-2.jpg
Footi
ng D
epth
Footing Diameter
End PostCas
Top Rail
WPC Fence Panel
Middle Post Cap
End Posts
Middle Posts
End PostCaps
Bottom Rail
Middle Post Cap
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Mansour Ahamed
Fence Assembly (Middle Posts)
07 / 12 / 2018
DRAWING NUMBERDATE
PD-014-04-00-0001-RB07/12/18
FOR APPROVALXX/XX/XX -
PAGE
1 OF 2
N:\Artwork\Logos - Do Not Move\Perma
Composites\Logo-and-tagline-CAD-2.jpg
Fence Panel
Single Post Cap
Single Post
Steel InsertsSingle Post Cap
Footi
ng D
epth
Footing Diameter
End PostCas
Top Rail
WPC Fence Panel
Middle Post Cap
End Posts
Middle Posts
End PostCaps
Bottom Rail
Middle Post Cap
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Mansour Ahamed
Fence Assembly (Middle Posts)
07 / 12 / 2018
DRAWING NUMBERDATE
PD-014-04-00-0001-RB07/12/18
FOR APPROVALXX/XX/XX -
PAGE
1 OF 2
N:\Artwork\Logos - Do Not Move\Perma
Composites\Logo-and-tagline-CAD-2.jpg
Footi
ng D
epth
Footing Diameter
End PostCas
Top Rail
WPC Fence Panel
Middle Post Cap
End Posts
Middle Posts
End PostCaps
Bottom Rail
Middle Post Cap
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Mansour Ahamed
Fence Assembly (Middle Posts)
07 / 12 / 2018
DRAWING NUMBERDATE
PD-014-04-00-0001-RB07/12/18
FOR APPROVALXX/XX/XX -
PAGE
1 OF 2
N:\Artwork\Logos - Do Not Move\Perma
Composites\Logo-and-tagline-CAD-2.jpg
Footi
ng D
epth
Footing Diameter
End PostCas
Top Rail
WPC Fence Panel
Middle Post Cap
End Posts
Middle Posts
End PostCaps
Bottom Rail
Middle Post Cap
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Mansour Ahamed
Fence Assembly (Middle Posts)
07 / 12 / 2018
DRAWING NUMBERDATE
PD-014-04-00-0001-RB07/12/18
FOR APPROVALXX/XX/XX -
PAGE
1 OF 2
N:\Artwork\Logos - Do Not Move\Perma
Composites\Logo-and-tagline-CAD-2.jpg
Top Rail
Bottom Rail
Footi
ng D
epth
Footing Diameter
End PostCas
Top Rail
WPC Fence Panel
Middle Post Cap
End Posts
Middle Posts
End PostCaps
Bottom Rail
Middle Post Cap
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Mansour Ahamed
Fence Assembly (Middle Posts)
07 / 12 / 2018
DRAWING NUMBERDATE
PD-014-04-00-0001-RB07/12/18
FOR APPROVALXX/XX/XX -
PAGE
1 OF 2
N:\Artwork\Logos - Do Not Move\Perma
Composites\Logo-and-tagline-CAD-2.jpg
PAGE 2PermaTimber®
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FENCE DESIGN GUIDE
DESIGNING YOUR FENCEWhen designing your fence, you must first be
aware of the wind classification at the location where the fence
will be installed. To determine the wind classification, you must
consider the Region, Terrain Category, Shielding Factor and
Topography.
REGIONWind regions are derived from Australian Standard AS/NZS
1170.2.2011 and are determined by your location within Australia.
The visible and hidden post configurations have both been
classified and certified for Regions A1 to A5 and B, which are
shown on the map below.
Please Note: Fence configurations can be designed to suit other
regions upon request.
PAGE 3PermaTimber®
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FENCE DESIGN GUIDE
TERRAIN CATEGORYTerrain category refers to the influence of the
terrain and potential structures on the wind speed at a given
location. Perma Fence™ by PermaTimber® is able to withstand a fully
exposed open terrain (Category 1) and has been designed for use in
all terrain categories.
PAGE 4PermaTimber®
SHIELDING FACTORThe shielding factor takes into account the
influence of any upwind obstructions against incoming wind speed.
The Perma Fence™ by PermaTimber® design has neglected this
influence and has been designed for locations with a ‘No Shielding’
factor.
DESIGNING YOUR FENCE
TOPOGRAPHIC EFFECTThe topographic effect is the effect of wind
on a structure due to its location and height on a hill, ridge or
escarpment. The Perma Fence™ by PermaTimber® design omits this
effect.
GUST WIND SPEEDThe Perma Fence™ by PermaTimber® has been
designed to withstand gust wind speeds of up to 45ms-1. Please note
that the fence configuration may vary in order to withstand this
level of wind speed.
WIND DIRECTIONPerma Fence™ by PermaTimber® has been designed to
withstand incoming wind from all directions.
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FENCE DESIGN GUIDE
PANEL CONFIGURATIONPerma Fence™ by PermaTimber® has been
independently certified to suit various wind speeds, and the
following information can be used to help you design the perfect
fence for your location. Posts are 1800mm height and are configured
as per the wind speed requirements in AS/NZS1170.2:2011.
FENCE CONFIGURATION FOR WIND SPEEDSThe table below outlines the
post configuration and spacing for varying wind speeds.
Please Note: Posts spacings are valid for all winds up to 33ms-1
and 38ms-1
Wind Classification Configuration Post Spacing (m)
N1S to D 2.5D to D 3.6
2 x ST to 2 x ST 1.8
N2S to D 1.8D to D 3.0
3 x ST to 3 x ST 1.8
S = Single One-Way Post D = Double (Intermediate) Two-Way Post
ST = Steel Inserts
PAGE 5PermaTimber®
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Perma Fence Posts
08 / 02 / 2019
DRAWING NUMBERDATE
08/02/19
FOR APPROVALXX/XX/XX -
PAGE
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Perma Fence Posts
08 / 02 / 2019
DRAWING NUMBERDATE
08/02/19
FOR APPROVALXX/XX/XX -
PAGE
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Perma Fence Posts
08 / 02 / 2019
DRAWING NUMBERDATE
08/02/19
FOR APPROVALXX/XX/XX -
PAGE
PLAN VIEW: VISIBLE POST CONFIGURATION (S to D & D to S)The
figure below outlines the configuration and post spacing for single
to double posts.
CERTIFICATION wyche consulting
FENCING CERTIFICATION
Page 2of 2
Configurations: Wind Design - Annual Recurrence Interval /Wind
Speed
Configuration Post Spacing (m)
50 years / 33 ms-1 S-D 2.5 D-D 3.6
2 x ST-2 x ST 1.8 500 years/ 38 ms-1 S-D 1.8
D-D 3 3 x ST- 3 x ST 1.8
S=Single One-Way Aluminium Post; D= Double Two – Way Aluminium
Posts; ST= Steel RHS Posts
S D D D
Plan View: Aluminium Post - Installation Configuration S-D,
D-D
S ST ST S
Plan View: Aluminium Post with Steel Internals - Installation
Configuration ST-ST Assumptions:
- Fence Posts 1.8 m in height, - Designed as free standing wall.
- Designed for Terrain Category 3 – areas of suburban housing. -
Designed with no shielding.
Outcome: Wyche Consulting herein advise that the fence posts and
castellated fencing in the above configurations have been checked
and are sufficient to take the wind loadings calculated for the
corresponding design wind speeds in accordance with AS/NZS
1170.2:2011. Caroline Morrell Director / Senior Structural Engineer
Wyche Consulting Pty Ltd 4/24 Cardigan Tce, Jolimont 6913 Ph: 9287
2626, 0409 208 442 [email protected] 14/11/18
PLAN VIEW: HIDDEN POST CONFIGURATION (ST to ST)The figure below
outlines the configuration and post spacing for single to double
posts.
CERTIFICATION wyche consulting
FENCING CERTIFICATION
Page 2of 2
Configurations: Wind Design - Annual Recurrence Interval /Wind
Speed
Configuration Post Spacing (m)
50 years / 33 ms-1 S-D 2.5 D-D 3.6
2 x ST-2 x ST 1.8 500 years/ 38 ms-1 S-D 1.8
D-D 3 3 x ST- 3 x ST 1.8
S=Single One-Way Aluminium Post; D= Double Two – Way Aluminium
Posts; ST= Steel RHS Posts
S D D D
Plan View: Aluminium Post - Installation Configuration S-D,
D-D
S ST ST S
Plan View: Aluminium Post with Steel Internals - Installation
Configuration ST-ST Assumptions:
- Fence Posts 1.8 m in height, - Designed as free standing wall.
- Designed for Terrain Category 3 – areas of suburban housing. -
Designed with no shielding.
Outcome: Wyche Consulting herein advise that the fence posts and
castellated fencing in the above configurations have been checked
and are sufficient to take the wind loadings calculated for the
corresponding design wind speeds in accordance with AS/NZS
1170.2:2011. Caroline Morrell Director / Senior Structural Engineer
Wyche Consulting Pty Ltd 4/24 Cardigan Tce, Jolimont 6913 Ph: 9287
2626, 0409 208 442 [email protected] 14/11/18
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FENCE DESIGN GUIDE
FOOTINGSPost footings will vary depending on the wind speed,
soil type and height of the fence. Footings can be founded in sand,
clay or limestone, and concrete shall have a minimum 28-day
characteristic strength of 20MPa (Grade 20).
The following table can be used to select the correct footing
size for your application.
Please Note: Footings near the gates and/or end posts will need
the depth increased by 100mm.
Wind Classification
Middle Post Spacing (mm)
Sand Dia x Depth (mm)
Clay Dia x Depth (mm)
Lime Stone Dia x Depth (mm)
N1
1800 200 x 800 200 x 500 200 x 3002500 200 x 900 200 x 600 200 x
3003000 200 x 950 200 x 600 200 x 3003600 200 x 1000 200 x 650 200
x 300
N2
1800 200 x 900 200 x 600 200 x 3002500 200 x 1000 200 x 700 200
x 3003000 200 x 1100 200 x 700 200 x 3203600 200 x 1100 200 x 800
300 x 350
PAGE 6PermaTimber®
DESIGN NOTESDesign wind speeds have been determined in
accordance with AS1170.2-2002 and AS4055-1992.
Footings have been based on the soil properties in the following
table.
Soil Type Cohesion Properties Shear Strength PerimeterSand 5kPa
35 DegreesClay 25kPa 15 Degrees
Lime Stone 8 MPa 37 Degrees
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FENCE DESIGN GUIDE
SOUND PROOFING PROPERTIESPerma Fence™ by PermaTimber® can also
be used as an acoustic fencing solution for both residential and
commercial projects. Tested in compliance with AS1191, it achieved
a Weighted Sound Reduction Index of 22 Rw.
PAGE 7PermaTimber®
SOUND REDUCTION PERFORMANCEPerma Fence™ by PermaTimber® will
typically reduce sound by 22dB, which will make a substantial
difference when looking to block out noisy traffic or
neighbors.
The human perception of sound emittance is shown in the table
below.
Sound Reduction (dB) Loudness Sensation130 Jet Aircraft at
100’
Physical Pain120 Bass Drum at 3’110 Thunder
Deafening100 Elevated Train90 Loud Street Noise
Very Loud80 Police Whistle70 Noisy Office
Loud60 Average Factory50 Noisy Home
Moderate40 Conversation30 Quiet Home
Faint20 Quiet Conversation10 Rustle of Leaves
Whisper0 Soundproof Room
Perma Fence™ has the ability to reduce sound by up to 22dB,
turning a noisy home into a quiet one.
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FENCE DESIGN GUIDE
ALTERNATIVE CONFIGURATIONDue to its modular design, Perma Fence™
by PermaTimber® can be used in a variety of different
configurations.
PAGE 8PermaTimber®
FRAMED CONFIGURATIONSteel framework can be used for ease of
installation and extra support. Please speak to your local
PermaTimber® representative for more information.
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Perma Fence SHS Frame Set Up
08 / 02 / 2019
DRAWING NUMBERDATE
08/02/19
FOR APPROVALXX/XX/XX -
PAGE
Perma Composites®14 Garino Rise,Wangara, WA, 6065
P: 08 6222 6681E: [email protected]:
www.permacomposites.com
Copyright: This drawing is the property of Perma Composites Pty
Ltd &Must not be reproduced or copied without prior, written
authorization
from Perma Composites Pty Ltd.
General Notes
Project
Date
Scale
Drawn ByDo Not Scale
Perma Fence SHS Frame Set Up
08 / 02 / 2019
DRAWING NUMBERDATE
08/02/19
FOR APPROVALXX/XX/XX -
PAGE
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FENCE DESIGN GUIDE
MAINTENANCE REQUIREMENTSPerma Fence™ by PermaTimber® is suitable
for use in marine environments, as the composite timber material
will not rot or corrode. General cleaning will be required when it
becomes dirty, please refer to the PermaTimber® Care Guide for
further instructions.
Perma Composites® does not accept liability for any loss or
damage suffered as a result of any errors in the interpretation or
application of this design guide. Any person wishing to check any
calculations made by them pursuant to this method may wish to seek
independent engineering advice.
PAGE 9PermaTimber®
