Edition 4 / Revision 5 TRANSPORT FOR NSW August 2020 TRANSPORT FOR NSW (TfNSW) QA SPECIFICATION R33 TRENCH DRAINS NOTICE This document is a Transport for NSW QA Specification. It has been developed for use with roadworks and bridgeworks contracts let by Transport for NSW or by local councils in NSW. It is not suitable for any other purpose and must not be used for any other purpose or in any other context. Copyright in this document belongs to Transport for NSW. REVISION REGISTER Ed/Rev Number Clause Number Description of Revision Authorised By Date Ed 3/Rev 0 Various Text revised to direct imperative style ”Superintendent” replaced by “Principal” “Shall” replaced by “must” References updated Reformatting and minor editing GM, RNIC 14.10.05 Foreword New clause after the Table of Contents 1.1, 2.2, 2.3 Materials requirements transferred to cl. 2 1.2 New clause, references transferred to Annexure R33/M Ed 3/Rev 0 (cont’d) 1.3, 1.4 Replaced by 1.2.3 and 1.3 respectively 4 Transferred to Annexure R33/B 2, 3, R33/1, R33/2 R33/3 Renumbered 4, 5, R33/E respectively Renumbered R33/L, R33/C respectively Ed 3/Rev 1 “Notice” RTA PO Box and Fax numbers updated. GM, IC 18.02.09 Global “Typos” corrected. Clauses reworded to improve clarity. 1.3 New clause: - Definitions of “you” and “your” included. - Definition of “pipe” moved to this clause from under “Scope”. Global Clauses rearranged: - Clause 1.3 “Order of Construction” relocated from under “General” to “Installation”; - Clause on staged drain construction under “Order of Construction” consolidated under one para in “Excavation”. - Flushing of cleanouts relocated from under “Backfilling” to “Cleanouts”. Annex B Pay Item P8 – scope clarified to include flushing out.
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Edition 4 / Revision 5 TRANSPORT FOR NSW
August 2020
TRANSPORT FOR NSW (TfNSW)
QA SPECIFICATION R33
TRENCH DRAINS
NOTICE
This document is a Transport for NSW QA Specification. It has been developed for use with
roadworks and bridgeworks contracts let by Transport for NSW or by local councils in NSW. It is not
suitable for any other purpose and must not be used for any other purpose or in any other context.
Copyright in this document belongs to Transport for NSW.
REVISION REGISTER
Ed/Rev
Number
Clause
Number Description of Revision
Authorised
By Date
Ed 3/Rev 0 Various Text revised to direct imperative style
”Superintendent” replaced by “Principal”
“Shall” replaced by “must”
References updated
Reformatting and minor editing
GM, RNIC 14.10.05
Foreword New clause after the Table of Contents
1.1, 2.2, 2.3 Materials requirements transferred to cl. 2
1.2 New clause, references transferred to
Annexure R33/M
Ed 3/Rev 0
(cont’d)
1.3, 1.4 Replaced by 1.2.3 and 1.3 respectively
4 Transferred to Annexure R33/B
2, 3, R33/1,
R33/2 R33/3
Renumbered 4, 5, R33/E respectively
Renumbered R33/L, R33/C respectively
Ed 3/Rev 1 “Notice” RTA PO Box and Fax numbers updated. GM, IC 18.02.09
Global “Typos” corrected.
Clauses reworded to improve clarity.
1.3 New clause:
- Definitions of “you” and “your” included.
- Definition of “pipe” moved to this clause
from under “Scope”.
Global Clauses rearranged:
- Clause 1.3 “Order of Construction”
relocated from under “General” to
“Installation”;
- Clause on staged drain construction under
“Order of Construction” consolidated under
one para in “Excavation”.
- Flushing of cleanouts relocated from under
“Backfilling” to “Cleanouts”.
Annex B Pay Item P8 – scope clarified to include
flushing out.
ii
Ed/Rev
Number
Clause
Number Description of Revision
Authorised
By Date
Ed 3/Rev 2 5 “ceramic pavement markers” replaced by
“Type B (non-retroreflective) pavement
markers complying with AS 1906.3”.
“a suitable epoxy adhesive” replaced by “an
adhesive complying with RTA 3554”.
GM, IC 31.03.09
Annex M Referenced documents updated.
Ed 3/Rev 3 4.6 Clause on “Disposal of Surplus Excavated
Material” added. Subsequent clauses
renumbered as 4.7 and 4.8.
GM, IC 28.05.10
Pay Item
R33P1
Scope clarified to include disposal of surplus
excavated material.
Annex C, C2 Clause references updated.
Annex E Drawing numbers and clause references
updated.
Annex M Referenced documents updated.
Ed 4/Rev 0 Previous clause 1.2.4 “Drawings”, clause 3
“Not Used”, clause 4.6 “Disposal of Surplus
Excavated Material”, clause 4.8 “Cleanout
and Inspection Structures” and Annex E
deleted.
GM, IC 16.05.11
Some clauses rearranged and renumbered.
1.1 Requirement to allow in program for
construction of trench drains not shown on
Drawings deleted.
Reference to spec R38 for edge drains
requirements inserted.
2 Expanded to include no fines concrete, filter
fabric, aggregate filter material.
3.1 Previous clause 4.1.
Requirement to prevent contamination of
filter material inserted.
3.3 Previous clause 4.3 retitled “Geotextile
Installation” and requirements expanded.
3.4 Previous clause 4.4.
Requirements for pipe laying expanded.
3.5 Previous clause 4.5.
Backfilling requirements changed.
3.6 New clause titled “Stage Construction”. All
clauses relating to stage construction
previously under other clauses collated under
this clause 3.6.
4 Previous clause 4.7.
Outlets requirements expanded under 3 sub-
clauses 4.1, 4.2 & 4.3.
5 New clause titled “Pavement Interface
Drains” added.
iii
Ed/Rev
Number
Clause
Number Description of Revision
Authorised
By Date
Ed 4/Rev 0
(cont’d)
6 Previous clause 5 retitled “Marking of
Trench Drains”.
Physical marking replaced by GPS
coordinates.
Annex B Pay Items rearranged and renumbered.
Measurement and Payment description of
excavation and backfill volumes changed.
Pay items for sand filter material and
cleanouts deleted.
Annex C Updated.
Annex D Updated.
Annex L Requirements changed.
Annex M Reference documents updated.
Ed 4/Rev 1 6 Clarification of requirement to mark drains
physically on site.
GM, IC 17.06.11
Ed 4/Rev 2 6 Clause reworded to improve clarity. GM, CPS 24.09.13
Ed 4/Rev 3 2 Headings added to form new (sub-)clauses
2.1 to 2.4.
MCQ 28.06.19
Annex B Pay Item P1 - Clarification added that no
further payment will be made under R44 for
excavation and backfilling work.
Pay Item P2 – Scope of rate clarified.
Ed 4/Rev 4 Global References to “Roads and Maritime
Services” or “RMS” changed to “Transport
for NSW” or “TfNSW” respectively.
DCS 22.06.20
Ed 4/Rev 5 Global Minor editorial changes. EDCS 21.08.20
Edition 4 / Revision 5 TRANSPORT FOR NSW
August 2020
QA SPECIFICATION R33
TRENCH DRAINS
Copyright – Transport for NSW IC-QA-R33
VERSION FOR:
DATE:
Trench Drains R33
Ed 4 / Rev 5 i
CONTENTS
CLAUSE PAGE
FOREWORD ............................................................................................................................................... II TfNSW Copyright and Use of this Document ............................................................................... ii Revisions to Previous Version ....................................................................................................... ii Project Specific Changes ............................................................................................................... ii
1 GENERAL ........................................................................................................................................ 1 1.1 Scope .............................................................................................................................. 1 1.2 Structure of the Specification ......................................................................................... 1 1.3 Definitions ...................................................................................................................... 2
2 MATERIALS .................................................................................................................................... 2 2.1 Corrugated Drainage Pipe and Rigid Strip Filter Drain ................................................. 2 2.2 Geotextile ....................................................................................................................... 2 2.3 Aggregate Filter Material and No Fines Concrete .......................................................... 2 2.4 Selected Material ............................................................................................................ 2
3 INSTALLATION OF TRENCH DRAINS ............................................................................................... 3 3.1 Order of Construction ..................................................................................................... 3 3.2 Excavation ...................................................................................................................... 3 3.3 Geotextile Installation .................................................................................................... 3 3.4 Laying of Pipe/Strip Filter Drains .................................................................................. 3 3.5 Backfilling ...................................................................................................................... 4 3.6 Stage Construction .......................................................................................................... 4
4 OUTLETS ........................................................................................................................................ 5 4.1 General ........................................................................................................................... 5 4.2 Outlets at Stormwater Drainage Structures .................................................................... 5 4.3 Outlets at Batters ............................................................................................................ 5
5 PAVEMENT INTERFACE DRAINS ..................................................................................................... 6 5.1 General ........................................................................................................................... 6 5.2 Outlets for Pavement Interface Drains ........................................................................... 6
6 MARKING OF TRENCH DRAINS ....................................................................................................... 7
ANNEXURE R33/B – MEASUREMENT AND PAYMENT .............................................................................. 8
ANNEXURE R33/C – SCHEDULES OF HOLD POINTS AND IDENTIFIED RECORDS .................................... 10 C1 Schedule of Hold Points ............................................................................................... 10 C2 Schedule of Identified Records..................................................................................... 10