Specification 704 ITS 20 May 2013.

MAIN ROADS Western Australia Specification 704 Cable Conduits/Pits for ITS of 26 Contract xxx/xx Document 04/10125 Issue 20/05/2013

SPECIFICATION 704

CABLE CONDUITS & PITS FOR

INTELLIGENT TRANSPORT SYSTEMS

(ITS) Copyright MAIN ROADS Western Australia


SPECIFICATION 704

CABLE CONDUITS & PITS FOR INTELLIGENT TRANSPORT SYSTEMS

REVISION REGISTER

Date Clause Number

Description of Revision AuthorisedBy

20/05/2013 704.02, 704.08 & 704.35

Added AS4586: 2004 and ANSI/SCTE-77:2010; added loading requirements for vault assemblies; added installation of HDPE pits.

AMTSAMTS

27/07/ 2011 Clause 704.37

Typo corrected AMTS

17/12/ 2010 Whole Document

Revision of several areas relating to pit materials, construction, security features, and installation/ maintenance requirements. “Pits” included in title

AMTS

11/11/ 09 704.08.10 & 704.35.08

Pit gasket clauses added TOM

01/08/06 Whole document

Complete revision of Issue 1.4 to new format

MCP


CONTENTS

Clause Page No

GENERAL ........................................................................................................................ 4

704.01 SCOPE ............................................................................................................ 4 704.02 REFERENCES................................................................................................. 4 704.03 – 704.05 NOT USED ...................................................................................... 4

PRODUCTS AND MATERIALS ...................................................................................... 5

704.06 MATERIALS AND WORKMANSHIP ................................................................ 5 704.07 PROPRIETARY ARTICLES ............................................................................. 5 704.08 ITS CABLE PITS .............................................................................................. 5 704.09 ITS CONDUITS .............................................................................................. 14 704.10 ITS PIT LABELLING …………………………………………………………… 14 704.11 – 704.25 NOT USED .................................................................................... 15

INSTALLATION ............................................................................................................. 15

704.26 NOTICES ....................................................................................................... 15 704.27 CONFLICT WITH OTHER BURIED SERVICES ............................................ 15 704.28 PUBLIC SAFETY ........................................................................................... 15 704.29 CLEARING ..................................................................................................... 15 704.30 TRENCHING .................................................................................................. 15 704.31 ROAD CROSSINGS ...................................................................................... 16 704.32 ROCK EXCAVATION..................................................................................... 16 704.33 BACKFILL ...................................................................................................... 16 704.34 REINSTATEMENT AND CLEAN-UP ............................................................. 16 704.35 ITS CABLE PITS ............................................................................................ 16 704.36 ITS CONDUITS .............................................................................................. 19 704.37 ITS CABLE ROUTE MARKERS & MARKING TAPE .................................... 20 704.38 TESTING OF CONDUITS .............................................................................. 21 704.39 – 704.80 NOT USED .................................................................................... 21

AS BUILT AND HANDOVER REQUIREMENTS .......................................................... 21

704.81 AS-BUILT INFORMATION ............................................................................. 21 704.82 – 704.90 NOT USED .................................................................................... 21

CONTRACT SPECIFIC REQUIREMENTS .................................................................... 22

704.91 – 704.99 NOT USED .................................................................................... 22


SPECIFICATION 704

CABLE CONDUITS & PITS FOR INTELLIGENT TRANSPORT SYSTEMS

GENERAL

704.01 SCOPE

1. The work under this specification consists of the supply and installation of underground cable, conduits, pits and route markers and associated equipment for running communications and electrical cables for Intelligent Transport Systems (ITS).

704.02 REFERENCES

1. Australian Standards, MAIN ROADS Western Australia Standards and MAIN ROADS Western Australia Test Methods are referred to in abbreviated form (e.g. AS 1234, MRS 67-08-43 or WA 123). For convenience, the full titles are given below:

Australian/New Zealand Standards

AS/NZS 2053 Conduits and Fittings for Electrical Installations AS/NZS 3000 SAA Wiring Rules AS 3996: 2006 Access covers and grates AS 4680: 2006 Hot Dipped Galvanizing (Zinc) Coatings AS4586: 2004 Slip Resistance Classifications of new pedestrian surface materials

Other Standards

AUSTEL Technical Standard 009 Installation Requirements For Customer Cabling (Wiring Rules) ANSI/SCTE-77:2010, Specification for Underground Enclosure Integrity

MAIN ROADS Specifications

Specification 202 TRAFFIC Specification 301 CLEARING Specification 302 EARTHWORKS Specification 404 CULVERTS

704.03 – 704.05 NOT USED


PRODUCTS AND MATERIALS

704.06 MATERIALS AND WORKMANSHIP

1. All work relating to cable conduits for electrical purposes as detailed on the Drawings shall be carried out in accordance with AS/NZS 3000.

AS/NZS 3000

2. All work related to conduits for communication purposes as detailed on the Drawings shall be carried out in accordance with Australian Communications Authority regulations.

ACA Regulations

3. The requirements of the power supply authority and the telecommunication authority and any other body or bodies having jurisdiction over such works in Western Australia, and the further requirements of this Specification, shall also be satisfied.

Authorities

4. Where any apparent discrepancy or contradiction occurs between this Specification and the aforementioned Standards and Regulations, this Specification shall take precedence.

Precedence

704.07 PROPRIETARY ARTICLES

1. Where any proprietary article is mentioned in these documents sole preference to any named material or equipment is not intended.

Preference

2. The Contractor shall submit to the Superintendent details of material or equipment where they are different to that which is specified. The characteristics of type, quality, appearance, finish, method of construction and or performance shall not be less than that specified, and the Contractor shall demonstrate conformance to the requirements of the Specification and the Drawings. The Contractor shall allow up to 14 days for assessment of the proposal.

Substitution and Conformance

3. Prior to the purchase of alternative material or equipment, the Contractor shall obtain the Superintendent’s written approval.

HOLD POINT

704.08 ITS CABLE PITS

1. Cable pits shall be made of precast concrete, glass reinforced polyester (GRP) resin, or High Density Polyethylene (HDPE) unsupported and structurally tested, certified and badged for the required loading. (See also Section 704.08, Item 4). They shall be fitted with heavy duty, well fitting, metal or Composite Resin Fill (CRF), lockable (by padlocks) lids, AS 3996 certified and badged Class B 80 kN.

Cable Pit Type

2. The cable pit type used shall consider the intended application. Where pits are to be installed over existing conduits with optical fibre already installed, or over ‘blown fibre’ tubes where the integrity of (some) fibre runs needs to be maintained, the installed pits shall be of a separable or segmented construction to facilitate this

Pit Application


requirement, thus not affecting the structural integrity of the cable pit.

3. The locking mechanism may reside in the lid, in a separate lid section, or can be incorporated in the pit structure. The securing mechanism for the lid (to the pit) shall directly engage the outside edges of the lid with the side of the pit, or with the side of a separately secured lid section. A securing mechanism that does not directly lock down or latch at least two opposing sides of the lid shall not be deemed to meet these requirements.

Pit Locking


4. As a minimum requirement, the pit and lid tested as a completed assembly shall withstand a loading of at least 80 kN conforming to the Class B rating specified in AS 3996: 2006, Table 3.1. and tested in the following configurations:

Table 1: Load testing details and requirements Test sequence Test

Configuration Requirements

Vertical Centre Load

5 applications of 53 kN applied at a rate not to exceed 5 kN per minute followed by 1 application of 80 kN at a rate not to exceed 5 kN per minute in free air.

Load applied to the geometric centre of the product assembly by a 240 mm by 240 mm steel load application plate with 25 mm soft plywood layer between product and plate.

The lid shall not deflect more than CO/45 on the first 53 kN load application and have no more than CO/100 permanent deflection after the fifth load application.

There shall be no structural damage of any part of the assembly after the last application of 80 kN load.

Sidewall Vertical Load

5 applications of 53 kN applied at a rate not to exceed 5 kN per minute followed by 1 application of 80 kN at a rate not to exceed 5 kN per minute in free air.

Load applied to the centre of the product assembly sidewall with the longest axis by a 240 mm by 240 mm steel load application plate with 25 mm soft plywood layer between product and plate such that half of the plate is engaged with the vault lid, or 120mm by 240mm loading plate engagement. The load shall be applied in the geometric centre of the engaged portion of the load application plate.

The lid shall not deflect more that CO/45 on the first 53 kN load application and have no more than CO/100 permanent deflection after the fifth load application.

There shall be no structural damage of any part of the assembly after the last application of 80 kN load.

Sidewall Lateral Pressure test

5 applications of 10 kN applied at a rate not to exceed 5 kN per minute in free air followed by a single application of 15 kN load.

Load is applied laterally to the longest sidewall by a steel plate 460 mm by 915 mm bearing against a soft medium such as sand to ensure uniform pressure to the sidewall.

The maximum deflection of the vault wall shall not exceed 2.2 mm per 100 mm of average sidewall length at 10kN.The assembly shall not have structural damage after the 15 kN load.

Higher ratings may need to be specified based on the pit location, and the likelihood of larger and heavier vehicles being driven over the pit.

Pit & Lid Loadings


AS3996: 2006 includes ratings of up to 900 kN loading for Class G. To meet the loading requirements, it is expected that the top of the pit would be strengthened, as part of the design, either with an increased material width (nominally 125mm) surrounding the lid, or by a reinforcing frame. Given that the lid loadings are transferred to the pits, the design, construction (mode and material), manufacture and installation of the pits shall be such that they can accommodate the specified forces without damage or distortion. CO used above refers to the Circular Opening of the pit and is defined in AS/NZ 3996-2006, Paragraph 1.1.4 and shown in Figure 1.1 of the specification. The following procedures and test methods shall be used to perform the test sequences noted above: Vertical Centre Load A 240 mm x 240 mm x 25.4 mm steel plate will be placed on a 240 mm x 240 mm x 25. 4 mm soft plywood layer and be located at the centre of the enclosure lid, oriented as indicated in Figure 1. The full magnitude of the cyclic load will be applied over the centre of the plate for 5 seconds and then removed. The loading and unloading rate shall not exceed 5 kN per minute. This cycle is repeated 4 more times, after which the final (maximum) load is applied for 10 seconds and then removed.

Figure 1 – Vertical Centre Load test configuration


Sidewall Vertical Load A 240 mm x 240 mm x 25.4 mm steel plate will be placed on a 240 mm x 240 mm x 25. 4 mm soft plywood layer and be located at the geometric centre of the longest axis of the vault such that half of the plate is engaged with the pit lid and the other half overhangs the pit lid, or 120mm by 240mm loading plate engagement with the lid as shown in Figure 2. The full magnitude of the cyclic load will be applied over the centre of the engaged portion of the plate for 5 seconds and then removed. The loading and unloading rate shall not exceed 5 kN per minute. This cycle is repeated 4 more times, after which the final (maximum) load is applied for 10 seconds and then removed.

Figure 2 – Sidewall Vertical Load Test Configuration


Table 2: Application Chart Application Reference

Specification Spec. Level

Load Requirement

Loading Plate

Loading Level

Ultimate Load

Requirements

Cyclic

Pedestrian/ Light Traffic

Areas accessible to

non-commercial

vehicles, including

footways and light tractor pathways.

AS 3996-2006 Class B

Vertical Centre Load,

Sidewall Vertical Load

240 mm by 240

mm steel plate with

25mm plywood interface

layer

5 x 53kN

80 kN Max deflection after first

Cyclic load : CO/100

Max permanent deflection after last

Cyclic load = CO/45.

No structural damage after Ultimate Load

Medium Duty/Slow Traffic in

Road

Areas accessible to slow moving commercial

vehicles

AS 3996-2006 Class C

Vertical Centre of Lid

- Lid and frame only

240 mm by 240

mm steel plate with


layer

5 x 100 kN



Max permanent deflection after last Cyclic load = CO/45



Heavy Duty Traffic in

Road

Carriageways and roads

open to commercial

vehicles

AS 3996-2006 Class D

Vertical Centre of Lid

- Lid only

240 mm by 240

mm steel plate with


layer

5 x 167kN



Max permanent deflection after last

Cyclic load = CO/45


5. Alternative materials for the pit and lid can be approved by the Contract Superintendent/Manager in consultation with the Asset Manager Traffic Systems. Consideration of these alternatives may be based on the following factors:

a) Chemical and biological inertness

b) Low fluid absorption

c) Durability, and resistance to weathering and ultra-violet radiation (UV)

d) Structural properties – load bearing capacity and resistance to distortion.

e) Hardness – ability to be cut and drilled with masonry tools

f) Thermal performance (at high and low temperatures)

g) Electrical conductivity and dielectric properties

h) Weight (in any case, lifting equipment commensurate with the weight should be used for handling)

The use of alternative materials shall take into consideration the site (soil) conditions, and specified loading requirements. Typical alternatives could include HDPE and/or composite materials such as glass reinforced polyester resin (GRP).

Materials

5.1 Pit lids shall have a Slip Classification of “W” when tested according to the Wet Pendulum test or “B” when tested according to the Wet Barefoot requirements as described in the AS 4586:2004 specification.

6. Pre-formed pits shall be designed and manufactured to suit the intended use. Prior to acceptance by Main Roads, documentation shall be supplied outlining the structural design, and the material(s) used in the product. This documentation shall include (but not be limited to) structural calculations, specifications, certified test results to verify

Approvals/ Documentation


product performance and longevity. Information should also be supplied on specific installation requirements to ensure optimum product performance.

7. The manufacturer and/or supplier shall include instructions for initial and periodic maintenance (as necessary) for the pits, lid and locking mechanism. The requirement (or availability) of any special tools shall be included.

Instructions/ Maintenance

8. Generally the nominal pit sizes to be used are MRW4, MRW5, MRW7, MRW8, MRW10, MRW11 as outlined as follows:

Table 3: Nominal Pit Sizes

Nominal Internal Dimensions - mm

Product Model

Length Width Depth

MRW4

550 250 600

MRW5 600 300 600

MRW6 600 350 800

MRW7 900 450 800

MRW8 1200 500 900

MRW10 1800 500 900

The sizes tabulated are the nominal minimum internal dimensions of the listed pits. As a guide, the project supervisor may approve the use of a pit that may have some dimensions smaller than the specified nominal size, by no more than 25 mm.

Vault extensions might be required when added depth is required. Extensions, when used, must be secured onto the bottom of the pit.

Pit Sizes

9. For the MRW concrete pits, two drainage holes of nominal 20-25mm diameter shall be provided in the base of each cable pit, located approximately 100mm from each end on the central long axis. The MRW HPDE pits are to have a clearance between the floor and the sidewalls of the pit that allow the drainage of water.

Drainage Holes

10 . Where the use of High-Density Polyethylene (HDPE) pits has been approved, the product would be subject to meeting structural requirements that will depend on soil conditions and preparation associated with installation.

HDPE Pit Structural Requirement

11 . When the MRW concrete pits are used, a plinth shall be constructed in accordance with Drawing 200531-0003 and shall have a minimum 28 day compressive concrete strength of 40 MPa. When using the MRW HDPE pits configured with composite resin fill (CRF) lids, a composite raising ring, of integral construction, may be used in lieu of a

HDPE and Concrete Pits


separate concrete surround. The ring must be secured to the top of the pit. The pit, ring, and lid as an assembly shall carry the required loads as detailed in the Application Chart of 704.08.4 above. There may still be a project specific requirement to install pits with concrete surrounds, or within a concrete pad or paved area. This requirement should be confirmed by the project manager. 12. Unless otherwise specified, Pit Lids must be Badged and fully Certified to AS 3996: 2006. Pit Lids shall be pad-lockable type, 4 to 5mm tread patterned, hot dipped galvanised steel to AS 4680: 2006. Composite Resin Fill lids shall meet AS4586:2004 Slip resistance standards with a ‘W’ Wet pendulum and/or ‘B’ Wet Barefoot classification. If the locking mechanism resides in the lid, the lock shall be recessed in a chamber hidden behind a steel panel of similar material to the lid. All metal components of the lid, pit and locking mechanism shall be hot dipped galvanised steel (to AS 4680: 2006) or marine grade stainless steel.

Pit Lids (Steel)

13. Alternative pit lid material and construction may be approved by the Project Superintendent/Manager in consultation with the Asset Manager Traffic Systems. Such alternatives could include Composite Resin Fill, HDPE, or separate lid sections, such as a combination of a (AS 4680: 2006) galvanised steel lid with a concrete filled galvanised steel/ aluminium tray lid, provided that the loading, construction/ performance and locking requirements of this specification are met. All lids shall be lockable with either a recessed padlock, as discussed in paragraph 15 above, for high security, or a captured L bolt lock for medium security applications.

Pit Lid Alternatives

14. For pit lids (including lids incorporating the locking mechanism), the lid surface shall have no hole larger than 6mm diameter with the locking chamber closed. Alternative lifting methods such as magnets may be used in place of lifting holes to access the locking chamber under a spring loaded cover. The locking mechanism cover plate shall not be secured by screws. All lids shall allow for safe and practical lifting. Requirement for special tools (if any) should be identified.

No lifting Hole

15. The pit locking mechanism, whether located in the pit or the lid, shall be supplied and fitted with a type 234 Yale brass padlock with stainless steel shackles, and must utilise the Main Roads secure (restricted copy) locking system. Details of the locking system should be obtained from the Project Superintendent /Manager.

Padlocks (Pit locking)

16. Pit gaskets are to be installed for sealing and prevention of sharps and other hazardous material from being inserted into the pit. Gaskets shall be secured to the lids in such a way that they remain with the lid upon removal of the lid from the pit. As an alternative, MRW pits may have containment receivers on all open holes, making the use of gaskets unnecessary.

Pit Gaskets

17. Suppliers of MRW pits, covers, raising rings, and accessories shall issue a warranty for the installed pit assembly for a period of seven years from the time of purchase, against damage due to normal use in field installations assuming the following conditions:

Warranty


17.1 Pit components and assembly are certified by an independent test laboratory for performance to the requirements of this specification.

17.2 Component selection of the pit assembly must be in compliance with the manufacturers recommended practice and application chart of this specification. Field deployment of MRW pits must comply with Mainroads design requirements and specific in-field criteria.

17.3 Installation of the pit assembly is completed according to the installation instructions contained in this specification.

17.4 Product is used as designed for the application.. Product abuse or misapplication is not covered.

17.5 If pit product or pit component becomes damaged within the warranty period, the component will be replaced free of charge to Mainroads. The warranty expressly does not include labour or travel costs associated with pit or pit component replacement. Freight costs to transport replacement items to Mainroads will be the responsibility of the manufacturer.

704.09 ITS CONDUITS

1. All conduits shall comply with the requirements of AS/NZS 2053.

AS/NZS 2053

2. All rigid UPVC electrical conduits shall be of 100mm diameter, heavy duty, compliant for underground use and shall be orange in colour.

Orange Conduit

3. All rigid UPVC communication conduits shall be of 100mm diameter, heavy duty and comply with AUSTEL Technical Specification TS 009, compliant for underground use and shall be white in colour. Conduits for the main ‘backbone’ shall be 100 mm diameter but may be reduced to 50mm diameter for branch connections to nodes and field devices such as controllers and CCTV.

White Conduit

4. Only rigid UPVC conduit fittings shall be used and all joints cemented using the manufacturer’s recommended adhesive.

Cemented Joints

5. Where a thread is required on a conduit, a suitable adaptor shall be cemented to the conduit.

Threads

704.10 ITS PIT LABELLING

1. ITS pit markers shall be fixed to the plinth surround of the cable pit with four brass or stainless steel countersunk screws and a suitable outdoor adhesive. The Pit Marker shall have the pit number engraved onto the plate in accordance with Main Roads Drawing 200431 -0080. Where there is no separate plinth fitted, the label should be attached, as above, to the upper surface of the pit side, otherwise with the approval of the Project Superintendent/Manager, to the pit lid.

Pit Label


704.11 – 704.25 NOT USED

INSTALLATION

704.26 NOTICES

1. The Contractor shall lodge all notices required by the power supply authority and any other authority having jurisdiction over the installation and pay any fees required.

Notices and Fees

704.27 CONFLICT WITH OTHER BURIED SERVICES

1. Prior to commencing any work, the Contractor shall certify to the Superintendent that all underground utilities have been identified, located and all necessary approvals from relevant service authorities have been obtained.

HOLD POINT

2. For Drainage pipes and other services shown on the drawings, in close proximity to conduit routes, manual excavation may be necessary.

Manual Excavation

704.28 PUBLIC SAFETY

1. The Contractor shall progress the works such that the length of open trench is kept to a minimum. No open trenches shall be left unattended, and shall be filled and compacted at the end of each day.

Open Trench

2. Where necessary, control of traffic including pedestrians and cyclists shall be undertaken by the Contractor in accordance with Specification 202 TRAFFIC and any appropriate and relevant Australian Standards applicable to Traffic Management.

Traffic Control

704.29 CLEARING

1. Clearing shall be undertaken in accordance with Specification 301 CLEARING.

Clearing

704.30 TRENCHING

1. The base of trenches shall be free of debris, stones and sharp objects.

Debris

2. Excavations in proximity to paved areas shall be suitably shored to prevent the sides of the excavation from collapsing. Paved areas shall not be undermined by excavations from work under the Contracts. Any damage caused shall be treated as a Non-Conformance.

Shoring

3. Where trenching is shared with a telecommunications carrier, the location of the shared trench with its associated pits and services shall be clearly identified. Details of requirements and responsibilities would be covered by an appropriate shared trenching agreement between Main Roads WA and the telecommunications carrier(s). The communications infrastructures should meet the agreed

Shared Trenching


requirements. Shared trenching arrangements may be negotiated with the Contract Superintendent/Manager in consultation with the Asset Manager Traffic Systems. Agreements would be signed by Main Roads at executive level.

704.31 ROAD CROSSINGS

1. New road crossings for the cable conduits shall be installed at the locations shown on the Drawings. The work shall include installation of bored sleeves

Locations

704.32 ROCK EXCAVATION

1. Trench excavation in rock shall be carried out in accordance with Specification 302 EARTHWORKS.

Rock Excavation

704.33 BACKFILL

1. Excavations not in paths or roadway shall be backfilled and compacted to match the surrounding soil density and graded to match surrounding surface level. The top 100mm layer above the top of the conduits shall be top soil to match existing surrounding material. Where there is insufficient viable top soil available on site, suitable material may be sourced elsewhere.

Compaction

2. Prior to backfilling any trenches, the Contractor shall certify that the conduits have been installed in accordance with the Contract and ‘As Built’ records of the location of the conduits have the Superintendent’s approval.

HOLD POINT

3. Backfilling and compaction under paths or roadways shall be done in accordance with Specification 404 CULVERTS.

704.34 REINSTATEMENT AND CLEAN-UP

1. Pavement surfaces, including concrete or brick paved areas and pathways, shall be reinstated to the satisfaction of the Superintendent.

Surface Reinstatement

704.35 ITS CABLE PITS

704.35.01 GENERAL

1. The maximum distance between cable pits shall be 250 metres. Every fourth pit (i.e. pits at approximately 1000 metre intervals) shall be a large MRW8 size to allow for the coiling of additional cable. These distances are applicable for optical fibre cable drawn in conduit.

2. Where ‘blown fibre’ is installed the distance between pits may be extended to a nominal 500 metres, coinciding with vehicle detector locations, where applicable. Pit spacing for ‘blown fibre’ may extend beyond this to a nominal 750 metres where there is no requirement for field devices within this spacing. Pit sizes will normally depend on project specific requirements. With the pits often coinciding

‘Blown Fibre’ Pits


with device locations, and the reduced need for intermediate ‘drawing’ pits, the MRW8 size would normally be required. Some MRW10 pits at specific locations may also be required.

3. Cable pits shall not be installed in locations subject to vehicular traffic. The pits should, however, be within 10 metres of a location where a splicing van can be safely parked.

Vehicular Traffic

4. All foreign material including sand and dirt shall be removed from the pit after installation.

Foreign Material

5. All pits shall have a minimum depth of no less than 800mm below the finished ground surface level.

Depth

6. The top of each pit shall be installed to the horizontal plane across each axis (except as required by Items 7 and 8 below).

7. In non-paved areas, the top of each pit shall be above the design surface level or natural level by 50mm +/- 10mm with the localised soil within 1 metre graded up to the top of the pit.

Non-Trafficable Areas

8. When installed in paved areas, pit lids shall be at the same level as the surrounding pavement surface and positioned flush with the surrounding pavement surface to avoid the edge becoming a tripping hazard.

Paved Areas

9. The pit gasket shall be installed directly under the lid and rest on the pit lip. When a pit containment receiver is used in the lifting holes, no gasket is required.

Pit Gasket

10. Pits shall be positioned with the largest dimension running parallel to a reference line, such as a path, boundary, kerb line or conduit run.

Orientation

11. Pit location should take into consideration other utilities and services. It should not be located over other services without the written approval of the relevant authority.

Other Utilities

12. Generally, pit location should take into consideration serviceability and access requirements. Pits should be placed where they can adequately be accessed by maintenance personnel. They should not be placed where they create a hazard either for personnel accessing/servicing the pit, or others.

Maintainability/Hazard Avoidance

704.35.02 HDPE PITS

1. MRW HDPE pits may be installed by opening the ground to proper dimensions and placing a foundation of crushed rock in the bottom of the hole, placing the pit assembly with a floor on the crushed rock, backfilling and tamping the soil as detailed as following:

HDPE Pit Installation

1.1 The perimeter of excavation should be approximately 300mm to 400mm longer and wider than external dimensions of MRW pit whilst depth should be approximately 75mm to 125mm deeper than the depth of MRW pit being installed.

Pit Excavation


Excavate the site using hand or mechanical methods ensuring that the bottom of the excavation is level and conforms with general slope of ground level. 1.2 Bed the MRW pit on layer of fine crushed rock (20mm or less) to a depth of 75mm to 125mm to prevent subsidence and assist drainage. The rock shall be free of soil and organic material. Alternatively a dry mix of cement and crushed rock in a ratio of 1:10 may be used where higher lateral loads are anticipated. In circumstances where other services are located underneath the MRW® pit, place approved mechanical protection below foundation covering complete base area of the pit.

Preparing Pit Foundation

1.3 MRW pit cover and floor should be installed and secured on body prior to placing pit into position and/or backfilling. Place the assembled pit into the excavation using appropriate handling method or aid. Once pit and lid are placed in position adjust the height and top of the pit so that it is level with surrounding footway/driveway or ground surface. Centre the pit in the excavation in line with the conduit entries and parallel to the edge of the footway or driveway paving.

Placing Pit in Excavation

1.4 Ensure top of the pit is as per final ground level and allow for the correct depth of footway or driveway to the edge of the pit.

a) Discard rocks larger than 40mm from the backfill material. b) Match level and surface grade to surrounding area. c) Remove excess excavated material from the site. d) Backfill around the pit using the finer excavated material in

200mm deep layers tamping each layer either by hand or using a mechanical tamper.

e) Ensure backfill flows into MRW pit rib pockets to secure pit into position.

Installed pit is as follows:

Backfilling


Figure 3 – Installed HDPE pit.

704.36 ITS CONDUITS

1. All conduits shall be installed at a depth not less than 500mm below the finished ground surface level.

Installation & Location

2. The bottom of cable conduits entering cable pits shall enter at a distance of no less than 100mm from the bottom of the cable pit. (See Drawing 200531-003.)

Conduit Entry

3. The bottom of cable conduits entering cable pits shall enter at a distance of no greater than 780mm from the top of the cable pit. (See Drawing 200531-003.)

4. Conduits shall be located not less than 2 metres behind the kerb line or shoulder where applicable except where shown on the drawings.

Distance from Kerb line

5. The conduits shall be, as far as practicable, in a direct line between pits.

Conduit Alignment

6. The separate conduits, such as for communications and power, as installed under this Contract, shall remain segregated and not cross over. For example, if the power conduit is on the side closest to the carriageway, it shall remain this way, and the corresponding pits shall also be the closest to the carriageway.

7. Notwithstanding the other clauses of this Contract, the conduit may, after receiving the Superintendent’s Approval, be placed on a radial alignment, to avoid subterranean obstructions, with a minimum radius of 50 m

8. Where the conduits enter the cable pits, a clearance hole (-0 +5mm) to suit the conduit size shall be cut in the pit (or panel insert)

Clearance Hole


using a hole cutter or similar tool. Pits with holes knocked in with a hammer or similar tool shall be rejected. Only one hole for each conduit entering the box shall be cut. Pits designed with rectangular block-outs for the use of HDPE/PVS panel insets can be utilised provided conduit entries are in accordance with this clause and the panel is firmly sealed to the block-out edges.

9. The conduit shall be sealed to the pit with Silastic or similar approved sealant.

Sealing

10. A bell-mouth shall be fitted to the end of each conduit within the cable pit.

Bell Mouth

11. Approved under road boring techniques shall be used for road crossings under existing road pavement and railway reserves. Trenching methods are not allowed.

Road Crossings

12. Seven (7) days prior to any boring activity, the Contractor shall submit the proposed boring methodology, plant and equipment, the extent of the site preparations required to undertake the works and the procedures that shall be followed to install conduits to line and level to the Superintendent for approval.

Boring Notification

13. A 3-core polyethylene or polypropylene rope, with 5.0 mm nominal diameter and blue/ yellow in colour, shall be installed in each conduit and suitably anchored at each end.

Draw Rope

14. Conduits to be installed in existing ducts under the roadway shall be capped at each end prior to installation to prevent foreign material entering the conduit. Special care shall be taken at all times to ensure that all conduits are free of foreign material.

Conduits to be Kept Clear

15. Conduits with foreign material inside shall be deemed to be non-conforming until all foreign material is fully removed or a replacement conduit is installed.

Non-Conforming Conduits

16. Conduit entry and exit points for the optical fibre shall be parallel with the long axis of the pits (at opposite ends). Side entry to pits or entry of conduits at right angles is not allowed. Large radius ‘sweeping bends’ shall be used in lieu of right angle entry/exit conduits.

Conduit Entries

704.37 ITS CABLE ROUTE MARKERS & MARKING TAPE

1. The location of all underground conduits shall be indicated by cable markers mounted on posts 1000mm above ground to top of sign. A post / bollard bearing the cable route marker shall be located at each cable pit, and placed between the cable pit and direction of possible traffic encroachment, within several metres of cable pit. Posts shall be concreted to ensure stable footing.

Post Mounted Cable Route Markers

2. The ITS cable route marker shall be adhesively attached to a post or bollard in accordance with Main Roads Drawing Number 200431-0080.

3. Each marker shall be inscribed with the telephone number


“(08) 9323 4848” and “Dial before you dig” number “1100”.

4. The Post or Bollard shall be of durable materials of ultra violet resistant heavy-duty plastic, aluminium or galvanised steel.

Post/Bollard

5. Where a metal bollard is used, it shall be a 76 x 38 x 2 RHS, 1300mm long and finished in Matt Golden Yellow Y14 in accordance with AS 1743, with a yellow cap inserted into the top of the post or bollard.

6. Where longitudinal spacing allows, markers shall be placed close to fences or other fixed structures to avoid damage by maintenance or other vehicles. 300mm of post shall be buried in ground leaving 1000mm above ground. Posts shall be concreted to ensure stable footing.

Placement

7. Markers shall not obstruct access for pedestrians, cyclists or vehicles.

Obstruction of Access

8. Communications Marking Tape (continuously labelled for Communications), or nominal 150mm width, shall be laid in the trench 300 mm above the ITS Communications conduit by the contractor, together with tracer wire, for the entire route. The Marking Tape shall comply with the Australian/New Zealand Standard AS/NZS 2648.1:1995.

704.38 TESTING OF CONDUITS

1. The Contractor shall test conduits after trenches have been filled and pits installed. The test shall be undertaken by drawing a test mandrel through the conduit. The test mandrel shall be 240mm long and 90% of the nominal internal diameter of the conduit. Conduit failing the testing shall be made good by the Contractor.

704.39 – 704.80 NOT USED

AS BUILT AND HANDOVER REQUIREMENTS

704.81 AS-BUILT INFORMATION

1. The Contractor shall supply “As Built” drawings conforming to “MAIN ROADS WESTERN AUSTRALIA – AUTOCAD DRAWING STANDARDS”.

As-Built Drawings

2. The Contractor shall make an accurate record of all changes where the actual installation differs from that shown in the contract drawings and specification.

3. Drawings shall be supplied in hard copy and electronic format (AUTOCAD 2004).

704.82 – 704.90 NOT USED


CONTRACT SPECIFIC REQUIREMENTS

704.91 – 704.99 NOT USED


SPECIFICATION 704 GUIDANCE NOTES

DELETE THESE GUIDANCE NOTES FROM FINAL DOCUMENT AFTER USING FOR REFERENCE

All edits to downloaded TDP documents shall be tracked (most word processing software allows this to be done automatically). Deletions shall be struck through e.g. example. Insertions shall be in italics e.g. example. If all information relating to a clause is deleted then the clause number should be retained and the words "NOT USED" should be inserted.

The proposed documents with tracked changes shall be submitted to the Project Manager for review, prior to printing the final batch of documents. When this final printing is carried out, the tracked changes option is to be turned off.

The Custodian of this specification is the Asset Manager Traffic Systems.

1. SIZE AND NUMBER OF CONDUITS

Each project will need discussion with the Asset Manager Traffic Systems to determine the size and number of conduits to be installed.

2. ROAD CROSSINGS

2.1 The location, number and type of road crossings to be confirmed by the Author.

3. DESIGN CONSIDERATIONS – CONFIGURATION OF ITS CONDUITS AND CABLE PITS

3.1 Conduits shall be run to enable cables to be 'drawn-in' after installation, with sufficient accessible cable pits to be used for this purpose.

3.2. A single 100mm diameter white conduit for fibre optic telecommunication cable and a single 100mm diameter orange conduit for electrical power cable, shall be installed below ground in a straight line between cable pits, along the cable route, in the configuration shown in Main Roads Drawing Number 200431-0081-1. Alternative configurations and arrangements, as with the use of ‘brown fibre’ may be approved by the Project Superintendent/Manager in consultation with the Asset Manager Traffic Systems.

3.3. Except where shown on the drawings, cable pits for each of the conduits shall be located at intervals to allow for hauling of the cable and connection to terminal equipment.


3.4. Existing road crossings for cable conduits are at locations and at depths below the pavement as shown on the drawings. The crossings consist of one or more 300mm concrete pipes extending 1 metre either side of the roadway. Heavy-duty underground conduits shall be used to segregate cables through the concrete pipes.

3.5. Cable pits shall be provided at the following specific locations:

a) Each side of under road crossings.

b) Nominated locations as shown on the drawings.

c) Changes in direction of conduit alignment of more than ten degrees.

d) Interfaces between different types of cable routes.

e) Every 250 metres or less (except for blown fibre installations where the spacing may be between 500metres and 750 metres depending on device connection requirements).

3.6. One MRW8 cable-jointing pit shall be located at every fourth pit location. One MRW8 cable-jointing pit shall be located at each side of under-road crossings. All other pits shall be MRW4 cable hauling pits. Except where shown on the drawings, the cable pits for each conduit route shall be located adjacent to each other, a minimum of 2 metres apart longitudinally, and offset to allow the other conduit route to pass. (See Main Roads Drawing Number 200431-0081-1.) The intention of this requirement is to allow the conduits to be laid side by side in the trench whilst ensuring that the two types of cable are completely segregated.

3.7. Where the work involves the relocation of existing ITS conduits, the use of MRW7 type pits in lieu of MRW8 pits may be specified to allow the re-use of pits and/or lids if this is an option.


CONTRACT SPECIFIC REQUIREMENTS TO ADD OR DELETE

The following clauses are to be placed under the CONTRACT SPECIFIC REQUIREMENTS as required.

NONE AT THIS TIME.


SPECIFICATION AMENDMENT CHECKLIST

Specification Name: No: 704 Revision No: ____Title: CABLE CONDUITS FOR ITS Project Manager: Name: _____________Signature: ___________Date:________ Checked By: Name: _______________Signature: ______________Date:________ Contract No: ______Contract Description: ________________________________

ITEM DESCRIPTION SIGN OFF

Note: All changes/amendments must be shown in Tracked Change mode until approved. 1. Project Manager has reviewed Specification and identified

Additions and Amendments.

2. CONTRACT SPECIFIC REQUIREMENTS addressed? – Contract specific materials/products/clauses added? (Refer Specification Guidance Notes for guidance).

3. Any unlisted Materials/Products proposed and approved by the Project Manager? – if “Yes” provide details at 15.

4. Standard Clauses amended? – MUST SEEK approval from MCP.

5. Clause deletions shown as ‘NOT USED’. 6. Appropriate INSPECTION & TESTING parameters included in

Spec 201 (Test Methods, Minimum Testing Frequencies verified).

7. ANNEXURES completed (Refer Specification Guidance Notes). 8. HANDOVER and AS BUILT requirements addressed. 9. Main Roads QS has approved changes to SMM. 10. Project Manager certifies completed Specification reflects intent

of the design.

11. Completed Specification – independent verification arranged by Project Manager

12. Project Manager’s review completed. 13. SPECIFICATION GUIDANCE NOTES deleted. 14. TABLE OF CONTENTS updated. 15 Supporting information prepared and submitted to Project

Manager.

Further action necessary:

Signed: (Project Manager) Date: _______________

Specification 704 ITS 20 May 2013.

Documents

Transcript of Specification 704 ITS 20 May 2013.