Territory Stories

Standard specification for road works 2015/2016

Details:

Title

Standard specification for road works 2015/2016

Collection

Standard specification for road works; Reports; PublicationNT

Date

2015

Description

Made available via the Publications (Legal Deposit) Act 2004 (NT).; Check within Publication or with content Publisher.

Notes

miscellaneous provisions ■ provision for traffic ■ clearing grubbing and rehabilitation ■ earthworks ■ conformance testing ■ pavements and shoulders ■ stabilisation ■ spray sealing ■ dense graded asphalt ■ slurry surfacing ■ miscellaneous concrete works ■ drainage works ■ protection works ■ road furniture and traffic control devices ■ pavement marking ■ landscape ■ ducting and conduits ■ traffic control signals ■ traffic counting stations ■ street lighting ■ directional (thrust) boring ■ measurement and payment ■ referenced documents ■ nt climate zones table ■ This document specifies the general standards of materials and workmanship required by the Department of Infrastructure for construction of civil road network assets

Language

English

Subject

Roads -- Northern Territory -- Works -- Periodicals.

Publisher name

Department of Infrastructure

Place of publication

Palmerston

Edition

Second edition

Parent handle

https://hdl.handle.net/10070/265830

Citation address

https://hdl.handle.net/10070/456054

Page content

LANDSCAPE STANDARD SPECIFICATION ROADWORKS DoI REFERENCE TEXT December 2015 Page 113 Table 16.1 Irrigation Schedule Irrigation Schedule: Fittings and attachments include but are not limited to those scheduled below for specific locations or fixtures: Location Item Requirement At points shown on drawings External hose cocks Type To AS 3500 Size 20 mm As on approved design plan Sprinkler Type Gear driven As on approved design plan Automatic valve Type Solenoid operated Size Maximum pressure loss 20 kPa As shown on drawings Quick coupling valve Type Polypropylene Size 25 mm As required to achieve uniform coverage Microsprays Type No moving parts At each plant Drippers Type Turbulent flow At each plant Bubblers Type Adjustable from 0 - 10 litres per minute. Irrigation Controller Use electric solenoid valves wired to an irrigation controller. In the Darwin Region, the irrigation controller is to be compatible with a Toro Irrinet irrigation telemetry system. At the completion of the defects liability period, liaise with the Departments landscape maintenance contractor to have the irrigation system handed over and included into the telemetry control system. Mount the controller in a weatherproof lockable cabinet. The controller installation is to include the following features: - Variable timer for each station with a range from 1 minute to not less than 30 minutes. - Manual cycle and individual station operation. - Manual on-off operation of irrigation without loss of program. - 240 V input and 24 V output capable of operating 2 control valves simultaneously. - 24 hour battery program backup. - Power surge protection. Electrical connection: Connect to a 240 V supply and provide an isolating switch at the controller. Automatic control valves: 24 V solenoid actuated hydraulic valves with flow control and a maximum operating pressure rating of at least 1 MPa. Provide valves able to be serviced without removal from the line. Install a gate valve of the same size immediately upstream from each automatic control valve. House both valves in a valve box with high impact plastic cover at finished ground level. Control wires: Connect the automatic valves to the controller with building wire laid in sealed conduits, with the mainline where possible. Lay intertwined for their full length without joints except within valve boxes. Use waterproof connections. Provide expansion loops at each solenoid lead or joint. Hold Point - Backfill trenches only after inspection and approval of wiring. Minimum size active 1.5 mm2. Minimum size common 2.5 mm2 laid in closed loop. Sprinkler Heads Provide heads which maintain a preset arc of throw, adjustable for radius, during watering operations and which are vandal-resistant. Pop-up type heads: Heads designed to rise out of their housings under supply pressure to a minimum "pop-up" height of 50 mm. Risers Mount all in-ground heads on reticulated risers. Mount above ground on fixed risers. Micro irrigation system Polyethylene irrigation pipe: To AS 2698 Class IRRIG with barbed fittings of similar pressure rating fastened with ratchet type clamps. Lay pipe on finished ground surface under planting bed mulch and anchor at minimum 1.5 m intervals with U-shaped stakes.