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Concept Structural Design Report

New Wee Waa High School

105-107 Mitchell St

WEE WAA, NSW 2388

Source Google Earth

Prepared for:

NSW Department of Education & School Infrastructure NSW

October 2021

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Disclaimer This report has been produced by Ingineered Pty Ltd for the NSW Department of Education & School Infrastructure NSW in accordance with the scope provided. This document cannot be reproduced or used by any third party without written permission. Copyright by Ingineered Pty Ltd 2021 This report does not contain confidential information.

Document Control & Revision Register Project: Proposed Wee Waa High School Client: NSW Department of Education & School Infrastructure NSW Our reference: 21-183_Concept Structural Design Report

Revision Date Comment/details Distributed to

A 15/10/2021 Formal Issue Matt Arnett – School Infrastructure NSW

B 28/10/2021 Formal Issue Matt Arnett – School Infrastructure NSW

Prepared by Reviewed & Authorised by Jeremy Leaning Chad Ings Senior Structural Engineer Senior Structural Engineer (Director)

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TABLE OF CONTENTS

1.0 INTRODUCTION……………………………………………………….….……………….. 1 1.1 Site & Project Description………………………………………….……………….. 1 1.2 Scope……………………………………………………………….………………… 1

2.0 CONSULTANTS DOCUMENTATION…………………………….…………………… 2 2.1 Flood Study………………………………..…………………….…………………… 2 2.2 Architectural Drawings….………………………………..…………………………. 2 2.3 Geotechnical Report………………………………………………………….…….. 2

3.0 STRUCTURAL CONCEPT REPORT………………………………………...…….….. 3 3.1 Flood Study & Proposed Earthworks………………………………………….….. 3 3.2 Geotechnical……………………………………………………………………….… 3 3.3 Building structures…………………………….. ……………………………………. 4

3.3.1 Building A, Building B, Building C & Building D……………………. 4 3.3.2 Building E & Building F……………………………………………….. 5 3.3.3 External walkways (on ground) and pavements……………..……. 5 3.3.4 Connections to buildings…………………………………..…………. 5

4.0 CONCLUSION…………………………………………………………….………… 6

APPENDICIES Appendix A – Structural Concept Plan

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1.0 INTRODUCTION

1.1 Site & Project Description

Students and staff were evacuated from the current Wee Waa High School site due to ongoing health issues in late 2020. Students are currently collocated within the town’s primary school in an overcrowded site. A Ministerial announcement made on 3 June 2021 committed to the construction of a new High School at Wee Waa on existing Department of Education owned land and adjacent Crown land as an urgent priority. The site is located on Mitchell Street/Kamliaroi Highway and is legally described as Lot 1 DP577294, Lot 2 DP550633 and Lots 124-125 DP757125.

This report accompanies a State Significant Development Application which seeks

consent for the construction of a new high school. The school will service 200 students

with potential to grow to a total capacity of 300 students, subject to further funding and

service need, and 61 staff. The new proposed new high school consists of a two-storey

building, an Indigenous learning centre, sporting fields and associated civil and utilities

works. For a detailed project description refer to the EIS prepared by Ethos Urban.

Source Google Earth

1.2 Scope

This Concept Structural Design Report has been prepared in response to the SEARs

report (application number SSD-21854025) specifically for the requirement for a

Structural Report.

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2.0 CONSULTANTS DOCUMENTATION

2.1 Flood Study The Flood Study documentation produced by Lyall & Associates were made available on the SharePoint. A list of the available drawings has been depicted below for reference.

2.2 Architectural drawings The Architectural drawings produced by SHAC were made available on the SharePoint folder. A list of the available drawings has been depicted below for reference.

2.3 Geotechnical Report The geotechnical report was made available on the SharePoint folder. The original report was undertaken by Barnson Pty Ltd reference 35754-GR02_A. A second report will be provided by Pacific Geotec Pty Ltd reference number PG-6504 Dated October 2021.

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3.0 STRUCTURAL CONCEPT REPORT

3.1 Flood Study & Proposed Earthworks

Lyall & Associates have completed various design options for Flood Mitigation. It has been advised that The Southern Chanel alignment will be option adopted and will require significant earthworks to re profile the site. The indicative cut/fill extract has been inserted below. Earthworks shall be carried out in accordance with the civil and geotechnical documentation.

Extract from WWHS Cut Fill Strategy

3.2 Geotechnical The original geotechnical report by Barnson Pty Ltd states the site currently consists of extremely reactive clays with an equivalent soil classification E-D with reactivity in the order of 125mm (in accordance with AS2870). Due to the presence of trees, it has been deemed to be classified as a class P. Prior to earthworks commencing on the site, it was recommended that the top 500mm of soil be stripped and stored for landscaping purposes. The site fill is then to be completed in a controlled manner to level 2 certification in accordance with the civil levels and the geotechnical requirements. The revised geotechnical report and advice from Pacific Geotec Pty Ltd is to reduce the proposed stripping of the site from 500mm down to approximately 200-300mm and remove the topsoil component only, proof roll and commence earthworks. The fill is then to be completed in a controlled manner and supervised by Pacific Geotec to be classed as certified fill. This reduces the volume of bulk earthworks and imported fill considerably as well as handling and stockpiling.

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3.3 Building structures The new school is made up of 6 buildings as depicted below. Buildings A to D share a common ground floor level and linked together via open corridors and hallways. Buildings A, B and D are two story buildings. Building C is a double height sports hall. Building E and F are separated from the main buildings and are single level structures. It has been advised that all buildings will require 500 free board above flood level and therefore will be elevated above the site earthworks from approximately 700mm to 1000mm.

Extract from architectural Ground Floor drawing

3.3.1 Building A, Building B, Building C & Building D All four buildings (A,B,C & D and linking walkways) share a common ground floor level. The concept structure for these buildings will be as follows: The foundations will consist of steel screw piles to a minimum or 4m below the surface level and will support the elevated ground floor which will be elevated with a 500 freeboard above the flood level. The ground floor structure will consist of either a concrete suspended slab (with a permanent formwork system) or structural steel with modular infill floor framing such as CLT cassettes. The wall framing and upper floor will be steel framed and braced with the CLT system. Roof trusses for the upper roof. Building C is the double height hall and expected to be a steel portal style structure with steel purlins and roof sheeting

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3.3.2 Building E & Building F Building E and F are single level isolated buildings separated from the main structure. The concept structure for these buildings will be as follows: The foundations will consist of steel screw piles to a minimum or 4m below the surface level and will support the elevated ground floor which will be elevated with a 500 freeboard above the flood level. The ground floor structure will consist of either a concrete suspended slab (with a permanent formwork system) or structural steel with modular infill floor framing such as CLT cassettes. The wall framing will consist of braced timber framing with roof trusses.

3.3.3 External walkways (on ground) and pavements For all external covered walkway structures there are two possible structural options available. Option 1 is a more conservative method which is less susceptible to surface movement, this is to provide a pile assisted footings beams and slabs on ground cast over collapsible void former to limit potential surface movement. Piles will need to be founded below 4m moisture change level. The structure over will be structural steel frames and steel roof sheeting. Option 2 is a more cost-effective method however is more susceptible to surface movement this is via articulated dowelled/jointed slabs on ground with modular overlapping roof structure which has tolerance to articulate independently. Column and wall structure above the ground slab will be structural steel frames and steel roof sheeting. All slab pavements are to be poured on a geotechnically approved subgrade (refer geotechnical report) and well articulates with sawn and dowelled joints to allow for potential surface movements. All joints are to be adequately sealed to prevent water ingress dampening and damaging the subgrade

3.3.4 Connections to buildings

Ramps from slabs on ground to the raised building structures will require specific detailing to allow for potential surface movements. This will be designed as a hinged relieving slab to allow for varying surface movements.

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4.0 Conclusion The new Wee Waa High school development consists of many challenges with regards to flooding, upgrades to stormwater drainage, very poor soil conditions. Section 3 in this report summarises the proposed concept to relieve the above concerns.

• The revised geotechnical advice will provide a considerable saving in bulk earthworks volumes.

• Due to the soil reactivity and flood levels the buildings will need to be piled and elevated to 500mm above the flood level.

• Two options for the covered walkways are proposed for consideration. In conclusion, with the above concerns being addressed, also along with the proposed structural concept, we consider this approach to be structurally sound.

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Appendix A – Structural Concept Plan

A B C D2

CD32013

CD3201

Y E F G H

17

CD3202

BUILDING F2Bulk Store

28.3 m2

Covered

HS506.05Plant SpaceHS506.049.9 m2

EnvironmentLab81 m2

LPGHS503.043 m2

FL +191.47SewerPump

WATERBORE

8CD3202

DustExtractionHS611.019 m2

Welding / HotMetal AreaHS503.0212 m2

2

7CD3202

A/CCompound39.4 m2

EMERGENCYSPACES /DELIVERY Metal Workshop

HS410.03118.8 m2

ALL EQUIPMENT TOBE CONFIRMED BYSCHOOL & SINSW

WoodWorkshopHS410.03118.8 m2

ALL EQUIPMENT TOBE CONFIRMED BYSCHOOL & SINSW

X

16.4 m2

MaterialsStoreHS410.0735.4 m2

1CD3201

Project StoreHS410.0442.8 m2

Wood and MetalGLSHS410.0267.4 m2

PrintingHS501.075 m2

Sys. AdminHS501.1813 m2

CareersHS501.1713 m2

EntryHS501.0220 m2

Library Admin /ComputerStudies CentreHS501.1157 m2

Assembly CourtHS607.01341.4 m2

Tiered OutdoorLearning 1HS504.0144.9 m2

BUILDING E+191.00

FL +191.47

Library MainAreaHS501.06141.5 m2

FL +191.47

1CD3201

RL +190.95

ENTRY PATH

CoveredOutdoorWorkshopHS503.0189.3 m2

BUILDING D

FL +191.47TANK

BELOW

A/CCompound20.5 m2

COVERED PATH

127.1 m2

BikeEnclosureHS609.0713.7 m2

NATIVE GRASSES MEADOWINDIGENOUSCULTURALCENTRE81 m2

+191.47Canteen 1HS604.0332.1 m2

SERVICE

3

4LE StoreHS502.0627 m2

GLASS DOOR GLASS DOOR Stair andRamp10.9 m2

FL +191.47

5

First AidHS502.1213.3 m2

COVERED AREA

BUILDING C

StageHS502.1650 m2

Staff SHWWCHS502.157.9 m2

ACC SHWWCHS602.127.6 m2

Office /StoreHS604.0412.1 m2

Vending M.HS604.071 m2

Boys WCHS603.01b14 m2

Bubbler0.7 m2

A. WCHS603.066.7 m2

Girls WCHS603.01a14 m2

Bulk StoreHS605.0413.3 m2

Outdoor LearningSpace 3HS504.0138.8 m2

Outdoor Learning Space -Support UnitHS504.0122.8 m2

BUILDING BLaundryHS409.089.9 m2

CommercialKitchenHS414.01107.9 m2

ChangeHS408.0321.9 m2

ShowerHS502.1315.4 m2

SE STOREHS502.0527 m2

ShowerHS502.1315.4 m2

GymnasiumHS502.02477.7 m2

GLASS DOOR6

PALISADEFENCEGATE

GLASS DOOR

Chair StoreHS502.0921.9 m2

ChangeHS408.0322.5 m2

SERVERYStoreHS409.0410.4 m2

Prep 2HS409.0621.4 m2

Pantry 2HS414.0221.1 m2

PERFORMANCE AREA

GLS 6HS409.0157.1 m2

SeminarHS404.0319 m2

PESHS430.414.5 m2

ACC. LaundryHS603.11 / 603.2110.3 m2

WithdrawalHS430.2210 m2

GLSHS430.0256.7 m2

StoreHS430.4110.7 m2

CAFE SERVERYGLS w/PerformanceAreaHS407.0476.2 m2

PESSSP430.414.5 m2

GLSHS430.0159.8 m2

StoreHS430.417.3 m2

PAA / LifeSkillsHS430.3332.9 m2

GLS 1HS401.0166.6 m2

GLS 1HS401.0166.6 m2

CommsHS611.048.6 m2

Lift5 m2

Vending M.HS604.070.8 m2

Cleaner'sSupplyHS605.057 m2

WCHS602.116 m2

CDSHS605.064.6 m2

Main SwitchHS611.029.4 m2

SeminarHS501.0813.3 m2

ARCHIBULL

BUILDING AInterviewHS601.1013.2 m2

Clinic-BoysHS601.1813.1 m2

StudentReceptionHS601.0412 m2

PublicReceptionHS601.0211.5 m2

Clerical 3HS601.1325.1 m2

WC+SHWHS602.119.6 m2

Clinic-GirlsHS601.1913 m2

70.7 m2

Archive& ITServiceHS605.0216.2 m2

Store 1HS601.1713 m2 Utility 2

HS601.2410 m2

VisitorHS601.2113 m2

Exec. 3HS601.168.2 m2

PrincipalHS601.0619.2 m2

PALISADEFENCEGATE

A

Acc.WCHS602.116.1 m2

Tea RoomHS601.224.6 m2

Int/Office 1.HS601.0813 m2

InterviewHS601.1013 m2

DeputyHS601.0713 m2

Counsellor13.2 m2

VOID

TANKBELOW

CommsHS611.049.5 m2

DBCHS611.033.9 m2

CDSHS605.063.6 m2

TANKBELOW

TANKBELOW

CommsHS501.1918 m2

RAIN GARDEN

PALISADE FENCE

B C D Y E F G

1:100H

DRAINAGE SWALEPALISADE FENCE

CO

VER

ED A

REA

SERVIC

E

FLAGPO

LES

YRL 199.870ROOF RL 199.870ROOFRL 195.670FIRST FLOORRL 190.570 NOMRL 191.470GROUND FLOOR RL 191.470GROUND FLOORSection A-A XRL 199.870ROOF RL 199.870ROOFRL 195.670FIRST FLOOR RL 195.670FIRST FLOORKAMILAROI HIGHWAYRL 190.570 NOMRL 191.470GROUND FLOOR RL 191.470GROUND FLOORRL 190.570GROUND

Section B-B XRL 199.870ROOF RL 199.870ROOFRL 195.670FIRST FLOOR RL 195.670FIRST FLOORKAMILAROI HIGHWAYRL 190.570 NOMRL 191.470GROUND FLOOR RL 191.470GROUND FLOORRL 190.570GROUNDSection C-C YRL 199.870ROOF RL 199.870ROOFRL 195.670FIRST FLOOR RL 195.670FIRST FLOORRL 190.570 NOMRL 191.470GROUND FLOOR RL 190.570 NOMRL 191.470GROUND FLOORSection D-D 1:1000mCONSULTANTSAMENDMENTSNo Drn Chk DateABCONSULTANT AREACompany NameT 4927 5566CONSULTANT AREACompany NameT 4927 5566CONSULTANT AREACompany NameT 4927 5566CONSULTANT AREACompany NameT 4927 5566CONSULTANT AREACompany NameT 4927 5566CONSULTANT AREACompany NameT 4927 5566DEFRT /HSRT /HSRT /HSJHJHJH25.05.2128.05.2116.06.2122.06.2108.07.21 CommentWeekly Project MeetingStakeholder WorkshopIssue to Client - Early ContractorInvolvementIssue to Client - for Civil inputIssue to Client - Early ContractorInvolvement - Addendum 01No Drn Chk DateGZEZFZGRT /HSRT /HSRT /HSRT /HSJHJHJHJH04.08.2115.09.2123.09.2128.09.21Comment90% (pending client approval)Consultant coordinationConsultant IssueConsultant IssueNo Drn Chk DateZHRT /HSJH 07.10.21CommentEIS SubmisisonNOTES1. Dimensions are in millimetres unless otherwise shown.2. Work to given dimensions. Do not scale from drawing3. Check all dimensions on site prior to construction andfabrication.4. Bring any discrepancies to the attention of the proprietor &architect.CLIENT NAMESchool Infrastructure NSWSCALE1:2000m246PROJECT NAME AND ADDRESSWee Waa High School105-107 Mitchell St, Wee Waa NSW 2388DRAWNRT / HSAPPROVEDJH810 @A1DRAWING TITLESectionsPROJECT NO. DRAWING NO.REV.4474 CD3201 ZHT +61 2 4961 5888F +61 2 4962 2577E info@shac.com.au224 Maitland RoadIslington NSW 2296Australia Nominated ArchitectJustin Hamilton (6160)ABN 32 131 584 84612345STATUSRef: BIMcloud: BIMSERVER24 - BIMcloud Basic for ARCHICAD 24/4474 Wee Waa PS Masterplan/4474.515.01 Wee Waa HS Concept Design date:7/10/21 time: 7:48 pm | Drawing and design © SHAC Pty Ltd. The signed control copy of this drawing is held by SHAC Pty Ltd.93009,3008400900420042009004,2008,4004,2009004,2009,3008,4004,2009004,2009,3008,4004,200

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