Power Poles Brochure - Technical Info
Transcript of Power Poles Brochure - Technical Info
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DuraspunPower Poles
CONCRETE POLES
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Outstanding durability
High-strength, low-permeability concrete produces a
highly durable product, even in harsh conditions such
as acid-sulphate soils and marine environments.
Minimum service life of 50 years is typical.
Impervious to termite infestation and rot.
Project cost savings can be relied on through
extended asset life.
Duraspun Concrete Power Poles
Unique product
The unique Rocla manufacturing process creates hollow,
steel-reinforced concrete poles of great strength and
relatively light weight, by spinning the mould at high speed.
The Duraspun process removes a significant proportion of
water in the concrete mix, which results in a high-density
concrete pole with inherently low permeability. The concrete
is also steam-cured for high early strength, enabling delivery
shortly after manufacture
Advanced Australian technology
A patented process allows the production of high strength
poles with tapered sides and embedded reinforcement cages.
The manufacturing process also allows poles to be pre-
stressed for ultimate design strength and stiffness.
Rocla has been manufacturing spun concrete poles since 1957
and is Australia's largest supplier of this unique product.
Manufacturing techniques were developed in Australia and all
the equipment designed and produced here by Rocla.
Superior performanceEconomical Rocla Duraspun power poles are designed and
manufactured to provide a long, trouble-free life. Many years
of testing and in-service performance provide a predictable
and secure support structure for overhead powerlines.
Low maintenance
Rocla Duraspun power poles are competitively priced
compared with other pole alternatives. The inherently
durable spun concrete poles require no external protective
wrappings or covers.
There is no need for internal inspections or for the use of
expensive and toxic chemicals to control termites or rot,
resulting in minimal or no maintenance expenditure.
In marine environments or in areas of high salinity, the
service life of Rocla Duraspun poles can be
significantly extended by the addition of corrosion
inhibitor in the concrete mix, which protects the steel
reinforcement against chlorides. Stainless steel butt
plates, epoxy coatings and other physical measures are
also available.
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Efficient installationCheap, fast and efficient installation by the direct embedment method in
an augured hole. No need for expensive mass concrete footings in most
soil conditions.
For installation in rock or hard soils, poles can be either bolted directly to
exposed bedrock, mounted on a pad footing, or installed using a collared
style technique. See below for details.
Longer poles can be manufactured in sections and bolted together on
site, reducing the mass and length of individual components.
In low strength or unstable soils, poles can be mounted on a driven Rocla
Duraspun concrete pile, permitting installation in ground conditions that
may otherwise require a very large, expensive slab footing or pile cap.
Full technical support on installation and embedment is available.
Wide range of integrated fittings
Rocla can fabricate poles with any combination and arrangement oftubes, ferrules, spigots and many other fittings to suit any pole-top
construction. Fittings can easily be specified using dedicated software
supplied by Rocla.
Wide availabilityRocla supplies the most extensive range of concrete poles in Australia.
Production flexibility allows Rocla Duraspun concrete poles to be
purpose-built for the actual conditions demanded by the design.
Delivery can be made at short notice, reducing the need for customer
stockholding.
Quality assurance and testingRocla manufactures concrete poles in strategically located factories
operating under a certified quality management system that conforms to
the requirements of the ISO9001 Quality Assurance Standard.
Routine sample testing provides important feedback to in-house structural
engineers, enabling constant improvement of design efficiency.
Rocla Duraspun power poles are designed in general accordance with
current Australian Standards and codes, including.
AS1170.2-2002 Structural design actions Wind actionsAS/NZ4676-2000 Structural design requirements for utility services poles
AS4065-2000 Concrete utility services poles
Unmatched resourcesThe ongoing development of Rocla Duraspun poles is supported by well-
established internal technical resources. Product design is carried out
by Roclas own engineering staff and designs are proven by rigid testing.
This unmatched resource of engineering expertise is complemented by a
comprehensive quality assurance program to produce durable, high
quality concrete poles.Rocla Duraspun concrete poles stand alone in their durability, design
flexibility and low maintenance. If you would like to realise the benefits
of spun concrete technology, call Rocla now.
Direct embedment Collared footing
In situ pad/pier footing
Backfill
ConcreteInfill
ReinforcedConcreteCollar
BlindingLayer
Backfill
GroundLevel
PoleMounted toDriven Pole
BoltedConnections
Driven Pile
Joint Lug
GroutBedding
ConcreteSlab
Foundation
FoundationStud
Driven pile footing
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Length Tip Design Tip Base NumberStrength Mass Diameter Diameter of
(m) (kN) (kg) (mm) (mm) Sections
8.0 10 - 24 820 - 1170 225 270 345 - 390 1
9.5 10 - 24 1020 - 1440 225 270 368 - 413 1
11.0 10 - 24 1240 - 1740 225 270 390 - 435 1
12.5 10 - 40 1480 - 2850 225 330 413 - 518 1
14.0 16 - 40 1970 - 3320 240 330 450 - 540 1
15.5 16 - 40 2270 - 3810 240 360 473 - 593 1
17.0 24 - 80 3220 - 6400 270 495 525 - 750 1
18.5 24 - 80 3630 - 7140 270 495 548 - 773 1
20.0 24 - 80 4070 - 7930 270 495 570 - 795 1
21.4 24 - 80 4520 - 8740 270 495 591 - 816 1
23.0 24 - 80 5000 - 9520 270 495 615 - 840 1
24.0 24 - 80 5330 - 10,140 270 495 630 - 855 1
Rocla Duraspun Power Pole Range Deflection vsLoad Comparison
Duraspun Conventionally Reinforced Poles
Length Tip Design Tip Base NumberStrength Mass Diameter Diameter of
(m) (kN) (kg) (mm) (mm) Sections
15.5 16 - 40 2270 - 3810 240 - 360 473 - 593 1
17.0 16 - 80 3080 - 6470 270 - 495 525 - 750 1
18.0 16 - 60 3500 - 5830 270 - 450 540 - 720 1
18.5 16 - 80 3585 - 7300 270 - 495 548 - 773 1
19.0 16 - 60 3800 - 6270 270 - 450 555 - 735 1
20.0 16 - 80 4020 - 8090 270 - 495 570 - 795 1
21.0 16 - 60 4370 - 7330 270 - 450 585 - 765 1
21.4 16 - 80 4460 - 8800 270 - 495 591 - 816 1
22.0 16 - 80 4690 - 9316 270 - 495 600 - 825 1
23.0 16 - 80 4960 - 9740 270 - 495 615 - 840 1
24.0 16 - 80 5290 - 10,310 270 - 495 630 - 855 1
26.0 24 80 6960 - 13,470 270 - 540 660 - 930 2
28.0 24 - 80 8210 - 13,340 270 - 495 690 - 915 2
30.0 32 - 80 9780 - 14,300 315 - 495 765 - 945 2
32.0 32 - 80 10,830 - 16,640 315 - 495 795 - 975 234.0 32 - 80 11,500 - 17,680 315 - 495 825 - 1005 2/3
36.0 40 - 80 13,380 - 21,350 360 - 495 900 - 1035 2/3
38.0 40 - 80 14,130 - 22,540 360 - 540 930 - 1110 2/3
Duraspun Pre-stressed Poles
16.0%
14.0%
12.0%
10.0%
8.0%
6.0%
4.0%
2.0%
0.0%
0 10 20 30
% of Ultimate Load
ReinforcedConcrete
Tip
Deflection
40 50 60 70 80 90 100
Pre-stressedConcrete
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Economical, durable support for powertransmission and distribution lines
Rocla Duraspun concrete poles are employed by
most Australian electricity authorities for power
transmission and distribution. They are ideal for
the construction of new power lines and as
replacement poles in existing lines.
Poles can be purpose-designed to meet specific
requirements. A wide range of pole lengths and
strength designations are available - from 8.0m to
50.0m and 5kN up to 300kN ultimate tip load.
Duraspun power poles are available in twodesign ranges:
Conventionally Reinforced Concrete
Provides a cost-efficient product, typically
suited to shorter length and lower strength
poles where deflection is not a primary
consideration.
Prestressed Concrete
A more specialized pole designed to limit
deflection and maximize performance and
durability in longer length poles and where
high and sustained loads apply. Typically
suited to high voltage transmission poles.
All power poles are available in a wide range
of lengths and tip strengths to suit most
design and construction requirements. Poles
over 24 metres in length are manufactured in
sections and joined on site using the patented
Rocla structural lug jointing system (see
Rocla Poles & Piles Handling & Installation
Guide).
DuraspunPower Poles
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DuraspunPower Poles
For further information on Rocla Duraspun power
distribution and transmission poles, lighting poles,
CCTV poles, communications poles, or bridge and
marina piles, contact your nearest Rocla Concrete
Poles branch.
E-mail your inquiry
[email protected] visit our website
www.rocla.com.au
Rocla Pty Limited
ABN 31 000 032 191
A member of the Fletcher Building Group
Trade mark of Rocla Pty Limited
Rocla Pty Limited February 2007
The contents of this brochure are copyright and may not be reproduced witout the
prior written consent of Rocla Limited. The information in this brochure is as far as
possible accurate at the date of publication, however, before application in anysituation, Rocla recommends that you obtain qualified expert advice confirming the
suitability of product(s) and information in question for the application proposed.
While Rocla accepts its legal obligations, be aware however that to the extent
permitted by law, Rocla disclaims all liability (including liability for negligence) for all
loss and damage resulting from the use of the information provided in this brochure.
Melbourne
35-39 Eighth Avenue,
Springvale Vic 3171
Phone (03) 9549 4540
Fax (03) 9574 1483
Wodonga
29 McGeochs Road,Bandiana Vic 3690
Phone (02) 6024 7566
Fax (02) 6056 1414
Sydney
72 Orchardleigh Street,
Guildford NSW 2161
Phone (02) 9721 5221
Fax (02) 9892 2820
Rockhampton
Monier Road,Parkhurst Qld 4702
Phone (07) 4936 1233
Fax (07) 4936 1708
5044