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Engineers & Scientists WIND ENGINEERING IIIMEM111111•1111 111M1 =1111 11 M1 ME ViNIC Vipac Engineers and Scientists Limited 279 Normanby Rd, Port Melbourne, VIC 3207, Australia Private Bag 16, Port Melbourne, VIC 3207, Australia t. +61 3 9647 9700 I 1. +61 3 9646 4370 I e. [email protected] w. www.vipac.com.au I A.B.N. 33 005 453 627 I A.C.N. 005 453 627 Vipac Engineers & Scientists 484 Swan Pty Ltd ATF 484 Swan Unit Trust 484 Swan Street, Richmond Pedestrian Level Winds - Wind Tunnel Test 30N-19-0042-TRP-6763321-2 23 July 2019 Melbourne • Sydney • Adelaide • Brisbane

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Page 1: Vipac Engineers and Scientists Limited 279 Normanby Rd, Port … · 2020-01-30 · Engineers & Scientists WIND ENGINEERING IIIMEM111111•1111 111M1=111111M1 ME ViNIC Vipac Engineers

Engineers & Scientists

WIND ENGINEERING

IIIMEM111111•1111 111M1=111111M1

ME

ViNIC Vipac Engineers and Scientists Limited

279 Normanby Rd, Port Melbourne, VIC 3207, Australia

Private Bag 16, Port Melbourne, VIC 3207, Australia

t. +61 3 9647 9700 I 1. +61 3 9646 4370 I e. [email protected]

w. www.vipac.com.au I A.B.N. 33 005 453 627 I A.C.N. 005 453 627

Vipac Engineers & Scientists

484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

30N-19-0042-TRP-6763321-2

23 July 2019

Melbourne • Sydney • Adelaide • Brisbane

Page 2: Vipac Engineers and Scientists Limited 279 Normanby Rd, Port … · 2020-01-30 · Engineers & Scientists WIND ENGINEERING IIIMEM111111•1111 111M1=111111M1 ME ViNIC Vipac Engineers

A

Vi?aC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Report Title: Pedestrian Level Winds - Wind Tunnel Test Job Title: 484 Swan Street, Richmond

DOCUMENT NO: 30N-19-0042-TRP-6763321-2

PREPARED FOR:

484 Swan Pty Ltd ATF 484 Swan Unit Trust

379 Collins Street

Melbourne VIC, 3000

CONTACT: Trevor Sands

Tel: +61 3 9278 5015

REPORT CODE: TRP

PREPARED BY: Vipac Engineers and Scientists Limited

279 Normanby Rd,

Port Melbourne, VIC 3207,

Australia

Tel: +61 3 9647 9700

Fax: +61 3 9646 4370

PREPARED BY:

Author: Date: 23 Jul 2019

Matthew Beames

Project Engineer

REVIEWED BY:

Reviewer: Date: 23 Jul 2019

Zhuyun Xu

Senior Wind Consultant

AUTHORISED BY:

Date:23 Jul 2019

Eric Yuen

Wind Engineer

REVISION HISTORY

Revision No. Date Issued Reason/Comments 0 04/07/2019 Initial Issue

1 09/07/2019 Minor Amendments

2 23/07/2019 Updated Drawings

DISTRIBUTION

Copy No. Location

Uncontrolled Copy

1 Project

2 Client (PDF Format)

3

KEYWORDS:

NOTE: This is a controlled document within the document control system. If revised, it must be marked SUPERSEDED and returned to the Vipac OA Representative. This document contains commercial, conceptual and engineering information that is proprietary to Vipac Engineers & Scientists Ltd. We specifically state that inclusion of this information does not grant the Client any license to use the information without Vipac's written permission. We further require that the information not be divulged to a third party without our written consent

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

EXECUTIVE SUMMARY

Vipac Engineers & Scientists Ltd (Vipac) has been commissioned by 484 Swan Pty Ltd ATF 484 Swan Unit Trust to carry out a wind tunnel test to determine the likely pedestrian level wind conditions for the proposed development at 484 Swan Street, Richmond

The model was constructed based on drawings supplied by Techne Architecture + Interior Design in June 2019. The proposed development and surrounding buildings covering a circular area of approximately 500m radius were modelled at a 1:400 scale. The approaching mean and turbulent flows of the Terrain Categories 2.5 & 3 (Cat. 2.5: 100°-120°, Cat. 3 all other angles) Atmospheric Boundary Layer were modelled based on Australian Standard AS 1170.2-2011.

The wind tunnels tests were carried out in the Boundary Layer Wind Tunnel Facility of VIPAC in Melbourne during June 2019. A comparison of the testing results was made with the updated drawings received in July 2019. The findings are summarised as follows:

With the updated proposed design:

• With the proposed design and without landscaping, wind conditions will fulfil the criterion for safety at all test locations.

• With the proposed design, wind conditions will fulfil the criterion for standing at the building entrance areas.

• With the proposed design, wind conditions will fulfil the criterion for walking in the adjacent footpaths.

• With the proposed design and landscaping, wind conditions for roof terraces fulfilled the recommended walking criterion, with these locations also fulfilling the more stringent standing comfort criteria.

• With the proposed design, wind conditions for the seating area in the southeast corner exceed sitting criteria. Recommendations have been made.

As a general statement, educating residents about wind conditions at apartment balconies/terraces during high-wind events and tying down loose lightweight furniture are highly recommended.

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ViniC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

TABLE OF CONTENTS

1 INTRODUCTION 5

1.1. ENVIRONMENTAL WIND EFFECTS 9

2 REGIONAL WIND CLIMATE 10

3 ASSESSMENT CRITERIA 11

3.1 Applicable Criteria 13

3.1.1 Rooftop areas Recommended Criterion Discussion 13

4 WIND TUNNEL SIMULATION 15

4.1 Similarity Requirements 15

4.2 Approach Wind Simulation 15

5 TEST PROCEDURE 18

5.1 Omnidirectional Pressure Sensors 18

6 PEDESTRIAN LEVEL WIND ASSESSMENT 19

7 RESULTS AND DISCUSSION 20

8 UPDATED DRAWINGS 24

9 CONCLUSIONS 25

10 REFERENCES 26

Appendix A Drawing Lists 27

Appendix B Polar Plots of Measured Wind Speeds 28

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ViPAC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

1 INTRODUCTION

Vipac Engineers & Scientists Ltd was commissioned by 484 Swan Pty Ltd ATF 484 Swan Unit Trust to carry out a wind tunnel test of the likely wind conditions for the proposed development at 484 Swan Street, Richmond.

The proposed development is a 14-storey building with the roof height of 54.5m from the ground level. The proposed development is located at the intersection of Swan Street and Cutter Street. There is a 20 m high building under construction, to the northwest. A satellite image of the proposed development site and the north elevation are shown in Figure 1 and Figure 2, respectively.

The proposed development is surrounded within a 2 km radius by a range of industrial and residential low to mid rise buildings, with parklands in the southeast. A satellite image of these site surroundings is shown in Figure 3. Considering the immediate surroundings and terrain, the site of the proposed development is assumed to be within Terrain Category 2.5 for 100 - 120 azimuth degrees and Terrain Category 3 for all other directions (Figure 3).

This report details the pedestrian level wind assessment results of the tests carried out on a 1:400 scale model of the proposed development in Vipac's Boundary Layer Wind Tunnel in Melbourne, during June 2019. The results show the wind effects in ground level public areas adjacent to the development as proposed.

The pedestrian wind environment study of the development was conducted using Omni-directional pressure sensor techniques to predict wind velocities. The study investigated safety and comfort in ground level pedestrian access-ways adjacent to the project.

Drawings of the proposed development were supplied to Vipac by Techne Architecture + Interior Design in June 2019. Updated drawings for the ground floor were received in July 2019 and a design comparison was made. A complete list of the drawings supplied is provided in Appendix C of this report.

Figure 1: Aerial view of the proposed development at 484 Swan Street, Richmond.

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Figure 2: North Elevation of the proposed development.

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ViPaC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Figure 3: Assumed terrain roughness for wind speed estimation.

Figure 4: Overall view from North of the 1:400 scale model of the proposed development in the wind tunnel.

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ViPLIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Figure 5: Close up view from the northeast of the 1:400 scaled model in the wind tunnel (Configuration 3 with recommended wind control).

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Vi?aC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

1.1. ENVIRONMENTAL WIND EFFECTS

Atmospheric Boundary Layer

As wind flows over the earth it encounters various roughness elements and terrain such as water, forests, houses and buildings. To varying degrees, these elements reduce the mean wind speed at low elevations and increase air turbulence. The wind above these obstructions travels with un-attenuated velocity, driven by atmospheric pressure gradients. The resultant increase in wind speed with height above ground is known as a wind velocity profile. When this wind profile encounters a tall building, some of the fast moving wind at upper elevations is diverted down to ground level resulting in local adverse wind effects.

The terminology used to describe the wind flow patterns around the proposed Development is based on the aerodynamic mechanism, direction and nature of the wind flow.

Downwash — refers to a flow of air down the exposed face of a tower. A tall tower can deflect a fast moving wind at higher elevations downwards.

Corner Accelerations — when wind flows around the corner of a building it tends to accelerate in a similar manner to airflow over the top of an aeroplane wing.

Flow separation — when wind flowing along a surface suddenly detaches from that surface and the resultant energy dissipation produces increased turbulence in the flow. Flow separation at a building corner or at a solid screen can result in gusty conditions.

Flow channelling — the well-known "street canyon" effect occurs when a large volume of air is funnelled through a constricted pathway. To maintain flow continuity the wind must speed up as it passes through the constriction. Examples of this might occur between two towers, in a narrowing street or under a bridge.

Direct Exposure — a location with little upstream shielding for a wind direction of interest. The location will be exposed to the unabated mean wind and gust velocity. Piers and open water frontage may have such exposure.

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• Wind Velocities in.'s

ViRrIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

2 REGIONAL WIND CLIMATE

The mean and gust wind speeds have been recorded in the Melbourne area for over 30 years. This data has been analysed and the directional probability distribution of wind speeds have been determined. The directional distribution of hourly mean wind speed at the gradient height, with a probability of occurring once per year (i.e. 1 year return period) is shown in Figure 6. The wind data at this free stream height is common to all Melbourne city sites and may be used as a reference to assess ground level wind conditions at the Site.

S

Figure 6: Directional Distribution of Annual Return Period Mean Hourly Wind Velocities (m/s) at Gradient Height of 500m

for Melbourne.

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

3 ASSESSMENT CRITERIA

With some consensus of international opinion, pedestrian wind comfort is rated according to the suitability of certain activities at a site in relation to the expected annual peak 3-second gust velocity at that location for each wind direction. Each of the major areas around the site are characterised by the annual maximum gust wind speeds. Most patrons may consider a site generally unacceptable for its intended use if it were probable that during one annual wind event, a peak 3-second gust occurs which exceeds the established comfort threshold velocity. If that threshold is exceeded once per year then it is also likely that during moderate winds, noticeably unpleasant wind conditions may result, and the windiness of the location may be voted as unacceptable.

The threshold gust velocity criteria are:

Table 1: Gust Velocity Criteria - Recommended Wind Speeds for Comfort and Safety

Annual Maximum Gust Speed

Result on Perceived Pedestrian Comfort

>23m/s Unsafe (frail pedestrians knocked over) <20m/s Acceptable for fast walking (waterfront or particular walking areas) <16m/s Acceptable for walking (steady steps for most pedestrians) <13m/s Acceptable for standing (window shopping, vehicle drop off, queuing) <11m/s Acceptable for sitting (outdoor cafés, gardens, park benches)

In a similar manner, a set of hourly mean velocity criteria with a 0.1% probability of occurrence are also applicable to ground level areas in and adjacent to the proposed Development. An area should be within both the relevant mean and gust limits in order to satisfy the particular human comfort and safety criteria in question.

The threshold mean velocity criteria are:

Table 2: Mean Velocity Criteria - Recommended Wind Speeds for Comfort and Safety

Mean Speed in

0.1% of Time

Result on Perceived Pedestrian Comfort

>15m/s Unsafe (frail pedestrians knocked over) <13m/s Acceptable for fast walking (waterfront or particular walking areas) <1 Om/s Acceptable for walking (steady steps for most pedestrians) <7m/s Acceptable for standing (window shopping, vehicle drop off, queuing) <5m/s Acceptable for sitting (outdoor cafés, gardens, park benches)

The Beaufort Scale is an empirical measure that related the wind speed to observed conditions on the land and sea. Table 3 describes the categories of the Beaufort Scale. The comparison between these observed conditions and the comfort criteria described above can be found in Table 4.

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ViPAC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Table 3: Beaufort Sca e - empirical measure relating wind speed to observed conditions on land

Beaufort Number

Descriptive Term

Wind Speed at 1.75 m height (m/s)

Specification for Estimating Speed

0 Calm 0-0.1

1 Light Air 0.1-1.0 No noticeable wind

2 Light 1.1-2.3 Wind felt on face Breeze

3 Gentle Breeze

2.4-3.8 Hair disturbed, clothing flaps, newspapers difficult to read

4 Moderate 3.9-5.5 Raises dust and loose paper; hair disarranged Breeze

5 Fresh Breeze

5.6-7.5 Force of wind felt on body. danger of stumbling when entering a windy zone

6 Strong Breeze

7.6-9.7 Umbrellas used with difficulty, hair blown straight, difficult to walk steadily, sideways wind force about equal to forwards wind force, wind noise on ears unpleasant

7 Near Gale 9.8-12.0 Inconvenience felt when walking

8 Gale 12.1-14.5 Generally impedes progress, great difficulty with balance in gusts

9 Strong Gale 14.6-17.1 People blown over

Table 4: Comparison between Mean comfort criteria and the observed conditions

Comfort Criteria Beaufort Scale Equivalent

Safety 9 — Strong Gale

Walking 5 — Fresh Breeze

Standing 4-5 — Moderate to Fresh Breeze

Sitting <4 — Moderate Breeze

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ViPAC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

3.1 APPLICABLE CRITERIA

The following table lists the specific areas adjacent to the development and the corresponding recommended criteria.

Table 5: Recommended application of criteria

Area Specific location Recommended Criteria

Public Footpaths and Access ways

Around the proposed development, along Swan Street and the southern walkway along the railway track

Within Walking

Building entrances Entrance to lobby or retail spaces (see Figure 7b) Within Standing

Communal Terraces Roof terrace area Within Walking (see discussion below)

3.1.1 ROOFTOP AREAS RECOMMENDED CRITERION DISCUSSION

Vipac recommends as a minimum that rooftop terrace areas meet the criterion for walking since:

• these areas are not public spaces;

• the use of these areas is optional;

• many similar developments in Melbourne and other Australian capital cities experience wind conditions on balconies and elevated deck areas in the vicinity of the criterion for walking.

However, it should be noted that meeting the walking criterion on elevated recreation areas will be no guarantee that occupants will find wind conditions in these areas acceptable at all times.

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

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Figure 7a: Plan view of the Ground level of the proposed development with the recommended comfort criterion overlaid (previous design June 2019)

II Recommended to fulfil Sitting • Recommended to fulfil Standing • Recommended to fulfil Walking

Figure7b: Plan view of the Ground level of the proposed development with the recommended comfort criterion overlaid (updated July 2019)

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

4 WIND TUNNEL SIMULATION

4.1 SIMILARITY REQUIREMENTS

The validity of wind tunnel testing relies on the similarity between model and full-scale parametets requires undistorted length scaling (ie. geometric similarity), similarity of flow parameters (i.e. kinemauu similarity) and finally similarity of pressures and forces.

Complete similarity is usually impossible to obtain because of the competing requirements of the various non-dimensional parameters, (e.g. Reynolds Number, Rossby Number and Richardson Number). Some requirements (i.e. Reynolds Number equality) can be waived for sharp edged structures immersed in a neutrally stable atmospheric boundary layer and geometric and kinematic similarity suffice. These are the requirements specified in Section C1.4, AS/NZS 1170.2 Supplement 1: 2011 [4] and are employed in this study.

4.2 APPROACH WIND SIMULATION

The wind effects tests were carried out in the 3m wide x 2m tall x 16m long Boundary Layer Wind Tunnel at Vipac Engineers and Scientists Ltd in Melbourne. The Boundary Layer Wind Tunnel is designed to simulate the flow incident on a proposed development by modelling the upstream terrain characteristic roughness. To this end, an estimate of the upstream terrain properties for the Development has been made and reproduced in the wind tunnel.

The approaching mean and turbulent flows of the Atmospheric Boundary Layers for the various terrain categories were modelled based on Australia Standard AS 1170.2-2011 (Figure 3). The wind tunnel calibration velocity and turbulence intensity profiles for Terrain Category 2.5 and Terrain Category 3.0 are shown in Figures 8 & 9. These represent the wind velocity and turbulence intensity profiles approaching the model of the development. Closer to the ground the wind moves more slowly but with increased turbulence. The simulated approach is indicative of full-scale planetary boundary layer velocity and turbulence intensity profiles.

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0.000 0.100 luu

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450

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350

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400

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150

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Figure 8: Mean Velocity and Turbulence Intensity Profiles for Terrain Category 2.5 (1:400 scale).

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0.000 0.100 luu

0.200

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Turbulence Intensity Profile

0.300

Normalised Wind Speed, V/Vref

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100

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Figure 9: Mean Velocity and Turbulence Intensity Profiles for Terrain Category 3 (1:400 scale).

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

5 TEST PROCEDURE

The pedestrian wind environment in the footpath areas adjacent to the development were assessed using omnidirectional pressure sensor tests (point method) [4].

5.1 OMNIDIRECTIONAL PRESSURE SENSORS

Velocity measurements were made using Irwin sensors (omnidirectional pressure sensors) installed at various locations at ground level footpath areas, at the selected terrace around the proposed development.

The distribution of Irwin sensors has allowed the determination of the variation in velocity over the surface of the model sufficient to capture the changes in velocity distribution that can typically occur over such areas. The resolution of measurement locations is in accordance with that prescribed in the Wind Tunnel Testing Quality Assurance Manual of the Australasian Wind Engineering Society.

PVC tubes with 1.5 mm internal diameter linked the Irwin sensors to pressure transducer device using a tuned arrangement to prevent harmonic fluctuations.

Velocity measurements were obtained at 10° wind azimuth increments starting from 0° (north) for a full 360° circle. The sampling time is determined based on the similarity criteria and corresponds to a total time of one hour in full scale. Statistical analysis was carried out on the signals for the mean and standard deviation. All velocity coefficients derived from the wind tunnel were converted to velocities by integrating the data with the Melbourne wind climate and corresponding to a 1-year return period design wind speeds.

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ViPAC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

6 PEDESTRIAN LEVEL WIND ASSESSMENT

The pedestrian wind environment in the footpath areas adjacent to the development, the proposed entrances were assessed using omnidirectional pressure sensor tests.

A total of 31 sensors were used in order to provide a quantitative measure of the wind speeds at various locations around the footpaths and building entrances (Figure 10) as well as some selected roof terrace areas (Figure 11). Wind speeds in some footpaths neighbouring the extent of the proposed development and across streets were also monitored. The tests were conducted for full 360° with 10° resolution.

Figure 10: Sensor Locations overlaid the Ground level of the immediate surroundings.

Figure 11: Sensor Locations overlaid the Roof terrace.

(Note, terrace area tested with 1.2m balustrade)

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

7 RESULTS AND DISCUSSION

The pedestrian wind environment in the footpath area and building entrance area were assessed using omnidirectional pressure sensor tests. The results of omnidirectional pressure sensor tests are presented as polar plots for the gust wind speeds and are shown in Appendix B of this report. Figure 12 shows an example of these plots. In the Figure, the colour circles represent the velocities for the different criteria and the three sets of symbols with lines represent the test predicted gust velocity for the 36 directions. The title of the plot also indicates the sensor number and the required criterion for this location.

Figure 12 shows that at Location 4 (North facing pedestrian walkway) measured wind speeds exceeding the recommended walking criterion for westerly winds (blue data set) and met the criterion for all directions when including the future building on the adjacent block to the west, 462-482 Swan Street.

Gust Wind Speed Location 4 Balking

Proposed - Config. 1 WCM - Config. 2 WCM - Config. 3

— Sitting — Standing —Walking

Fast Walking

Figure 12: Polar plot showing the wind gust compared with safety and comfort criteria (Location 4).

Two main types of tests were conducted during the testing;

1) Safety test: without any landscaping. 2) Comfort test: without any street trees. Some recommended wind control measures were also tested for

the areas where some exceedances were observed. The Comfort test were also conducted with three configurations:

• Configuration 1: test with proposed development and current surroundings also including building across the road to the northwest under construction

• Configuration 2: test with proposed development with wind control measures and current surrounds also including building across the road to the northwest under construction, and planned building on adjacent site to the west.

• Configuration 3: test with the proposed development with wind control measures and all proposed future developments that will be built up within 5 years in the surrounding area.

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ViPaC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Based on the tests conducted, the following points were observed:

SAFETY CRITERION

Test results showed that the proposed development would not generate any safety issues for the pedestrian level wind environment.

COMFORT CRITERIA

Footpath at Ground Floor

With the proposed design (Configuration 1), most footpaths were measured to have wind speeds within the recommended walking criterion for all wind directions with the exception of Locations 2, 4, and 28.

For these locations, the addition of the future building on the adjacent block to the west, 462-482 Swan Street (Figure 13 & Figure 14), reduced the wind speeds to within the recommended walking criterion. It is the understanding of Vipac that this building has a permit and therefore reasonable to conclude that it will be going ahead. For this reason it has been included in the test.

Building Entrances

With the proposed design and existing surroundings, the entrances at Locations 3, 5, 7 & 14 exceed the recommended standing comfort criterion.

For sensor Location 3, the addition of future building at 462-482 Swan Street reduced the wind conditions to within the recommended standing criterion.

For sensor Location 5, the addition of a 3.0m (w) x 2.5m (d) canopy on the level above the entrance over the footpath reduced the wind conditions to within the recommended standing criteria (Figure 15).

For sensor Location 7, we recommend setting back the entrance by 1.5m (Figure 15).

For sensor Location 14, we recommend moving the entrance to face south (ie. moving the entrance to sensor Location 27) and then either set back the entrance 1.5m or change the entry to an airlock.

Outdoor Seating Areas

With the proposed design, sensor Location 13 does not meet the recommended sitting criterion. We recommend moving the seating area further to the north, closer to sensor location 12, which is within the sitting criterion for all directions.

Neighbouring Footpaths

With the proposed design without landscaping and including the future building at 462-482 Swan Street, the neighbouring footpaths are within the walking comfort criteria.

Rooftop Terraces

With the proposed design with the 1.2m balustrade but without landscaping, the rooftop terraces are within the recommended walking criteria for sensor locations 29 & 31; and exceeded the walking comfort criterion for sensor location 30 in one direction (300). When the proposed landscaping and pergola was included (Figure 16) all sensor locations were within the recommended walking comfort criteria, with Locations 29 & 31 achieving the more stringent sitting comfort criterion, and sensor 30 within standing comfort.

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

A, I L

SWAM STREE1

1 J

" ..... *I I

=11

1-1

alwatr TRINSIII1011 14-1 Or rl-

r4+1-014+

BUFO

RD S

TRUT

OVER

PASS

[7: L'E__J

Figure 13: ground floor plan of 462-482 Swan Street

Figure 14: side view of proposed building 462-482 Swan Street

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Add 3m (w) x 2.5m (d) canopy over entrance extending from over existing footpath

11: Move entrance entrance to South and add 1.5m set back or change entry to airlock

wtio.iees e.3•■•

E

1•10141111.1111%

Add 1.5m set back entrance

_J

Move seating area north along walkway

L

ViN1C 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Figure 15: ground floor plan with recommended wind control measures (tested plan)

Figure 16: proposed landscaping and pergola for terrace area

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41

ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

8 UPDATED DRAWINGS

Updated drawings were supplied to Vipac in July 2019, and a comparison was made with the findings of the wind tunnel test in June 2019. The significant changes are highlighted in Figure 17.

We note the following significant changes: • Deleted the north facing door to Tenancy 2 • Added a full height screen on the east facing door of Tenancy 2 • Added an airlock to the south facing door Tenancy 4 — Retail

It is the expectation of Vipac that the updated ground level design will fulfil the recommended standing criterion at entrances, and walking criterion at pedestrian pathways.

However, Vipac recommends that the designated seating area at the south east corner is relocated further north along the lanewav (see figure 15).

Figure 17: updated ground floor drawings July 2019 with highlighted changes overlaid.

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

9 CONCLUSIONS

Vipac Engineers & Scientists Ltd (Vipac) has carried out scaled wind tunnel testing for pedestrian level wind effects of the proposed development at 484 Swan Street, Richmond. Wind conditions have been assessed based on internationally accepted comfort and safety criteria.

A design review comparison as made with the updated drawings (July 2019) with the findings on the June 2019 wind tunnel test was made. The following conclusions are drawn:

With the updated proposed design:

• With the proposed design and without landscaping, wind conditions will fulfil the criterion for safety at all test locations.

• With the proposed design, wind conditions will fulfil the criterion for standing at the building entrance areas.

• With the proposed design, wind conditions will fulfil the criterion for walking in the adjacent footpaths.

• With the proposed design and landscaping, wind conditions for roof terraces fulfilled the recommended walking criterion, with these locations also fulfilling the more stringent standing comfort criteria.

• With the proposed design, wind conditions for the seating area in the southeast corner exceed sitting criteria. Recommendations have been made.

As a general statement, educating residents about wind conditions at apartment balconies/terraces during high-wind events and tying down loose lightweight furniture are highly recommended.

This Report has been Prepared

For

484 Swan Pty Ltd ATF 484 Swan Unit Trust

By

VIPAC ENGINEERS & SCIENTISTS LTD.

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ViPAC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street. Richmond

Pedestrian Level Winds - Wind Tunnel Test

10 REFERENCES

[1] Australian/New Zealand Standard 1170.2:2002, Wind actions

[2] Melbourne, W. H., "Criteria for Environmental Wind Conditions", Jour. Industrial Aerodynamics, Vol. 3, 241-249,1978

[3] Simiu E, Scanlan R, "Wind Effects on Structures". Wiley-Interscience

[4] Aynsley R., Melbourne W., Vickery B., Architectural Aerodynamics Applied Science Publishers

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ViPAC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Appendix A DRAWING LISTS

Received June 2019

TP DRAWING TRANSMITTAL

SHEET NUMBER SHEET NAME REVISION TP00 COVER PAGE 8 LOCATION PLAN E TP01 EXISTING SITE PHOTOGRAPHS E TP02 PROPOSED SITE PLAN E TP10 PROPOSED BASEMENT 3 FLOOR PLAN E TRI 1 PROPOSED BASEMENT 2 FLOOR PLAN E TP12 PROPOSED BASEMENT 1 FLOOR PLAN E 713 PROPOSED GROUND FLOOR PLAN E TP14 PROPOSED LEVEL 1 FLOOR PLAN E TP15 PROPOSED LEVEL 2 FLOOR PLAN E

TP16 PROPOSED LEVEL 3 FLOOR PLAN E TP1 7 PROPOSED LEVEL 4 FLOOR PLAN E

718 PROPOSE: LEVEL 5 FLOOR PLAN E TP19 PROPOSE. LEVEL 6 FLOOR PLAN E TP20 PROPOSED LIVE 7 FLOOR PLAN E

TP21 PROPOSE✓ LEVEL 8 FLOOR PLAN E TP22 PROPOSED LEVEL 9 FLOOR PLAN E TP23 PROPOSED LEVEL 10 FLOOR PLAN E TP24 PROPOSED LEVEL 11 FLOOR PLAN E TP25 PROPOSED LEVEL 12 FLOOR PLAN E TP26 PROPOSED LEVEL 13 FLOOR PLAN E TP27 PROPOSED SERVICES FLOOR PLAN E TP28 PROPOSED ROOF PLAN E TP30 PROPOSED NORTH AND EAST ELEVATIONS E TP31 PROPOSED SOUTH AND WEST ELEVATIONS E

TP35 PROPOSED SWAN STREET DETAILS E TP36 SWAN a" & RAIL FOOTPATHS B TP40 PROPOSED BUILDING SECTIONS E TP41 PROPOSED ENTRY RAMP DETAILS E IPSO MATERIALS SCHEDULE - A3 ONLY E

Received July 2019

Sheet Number Sheet Name Revision

TP13 Proposed Ground Floor Plan G

TP30 Proposed North and East Elevations H

TP35 Proposed Swan Street Details H

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ViNIC 484 Swan Ply Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Appendix B POLAR PLOTS OF MEASURED WIND SPEEDS

Note: Only Gust wind speeds are presented

Gust Wind Speed Location 1

Walking

N

S

Gust Wind Speed Location 2

Walking N

—4—Proposed - Config. 1 WCM - Config. 2 WCM - Config. 3

Sitting — Standing

Walking — Fast Walking — Safety

—4,— Proposed - Config. 1 —4—With WCM - Config. 2 -4k—With WCM - Config. 3

Sitting Standing Walking

— Fast Walking — Safety

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Gust Wind Speed Location 4

Walking

ViMc 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

GustWi • nd Speed

Location 3 Standing

N

Proposed - Config. 1

—A—With WCM - Config. 2

—*—With WCM - Config. 3

Sitting

Standing

— Walking

— Fast Walking

— Safety

S

—.—Proposed - Config. 1 --With WCM - Config. 2 - With WCM - Config. 3 — Sitting —Standing — Walking - Fast Walking —Safety

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—0—Proposed - Config. 1 WCM - Config. 2 WCM - Config. 3

—Sitting Standing Walking Fast Walking

—Safety

V i Nic 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 5 Standing

N

—s—Proposed - Config. 1 —40—With WCM - Config. 2

WCM - Config. 3 Sitting Standing Walking Fast Walking

—Safety

Gust Wind Speed Location 6

Walking N

S

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ViPac 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street. Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 7 Standing

Proposed - Config. 1 — Sitting — Standing —Walking

Fast Walking Safety

S

--.—Proposed - Config. 1 WCM - Config. 2 WCM - Config. 3

— Sitting — Standing

Walking Fast Walking

— Safety

Gust Wind Speed Location 8

Walking

N

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S

Gust Wind Speed Location 10

Walking

N

S

V; Mc 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street. Richmond

Pedestrian Level Winds - Wind Tunnel Test

Proposed - Config. 1 WCM - Config. 2

—16—With WCM - Config. 3 — Sitting

Standing Walking

— Fast Walking — Safety

Proposed - Config. 1 tWith WCM - Config. 2

WCM - Config. 3 Sitting Standing

— Walking — Fast Walking —Safety

Gust Wind Speed Location 9

Walking

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ViNIC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 11

Standing

N

—.—Proposed - Config. 1 --With WCM - Config. 2 —r—With WCM - Config. 3 —Sitting — Standing — Walking

Fast Walking — Safety

Gust Wind Speed Location 12

Walking

—*—Proposed - Config. 1 --With WCM - Config. 2 —a— With WCM - Config. 3 — Sitting — Standing — Walking

Fast Walking Safety

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Vinci 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street. Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind 13

d Speed

Sitting

N

Location

S

—11—Proposed - Config. 1 — Sitting — Standing

Walking Fast Walking Safety

Gust Wind Ind Speed Location 14

Standing

—1— Proposed - Config. 1 Sitting Standing Walking

— Fast Walking ∎Safety

S

30N-19-0042-TRP-6763321-2

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—.—Proposed - Config. 1 —40—With WCM - Config. 2 —so—With WCM - Config. 3 — Sitting — Standing — Walking

Fast Walking 4■111■Safety

Vinic 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 15

Walking

N

S

Gust Wind Speed Location 16

Walking

N

—.—Proposed - Config. 1 --With WCM - Config. 2 —so—With WCM - Config. 3

Sitting — Standing

Walking Fast Walking

•Safety

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ViPac 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 17

Walking

N

Gust Wind Speed Location 18

Walking

N

23 July 2019

—i—Proposed - Config. 1 --With WCM - Config. 2

WCM - Config. 3 — Sitting

Standing Walking

— Fast Walking — Safety

-.0—Proposed - Config. 1 —0—With WCM - Config. 2 f With WCM - Config. 3 — Sitting

Standing —Walking - Fast Walking — Safety

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Vi 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 19

Walking N

—.—Proposed - Config. 1 t With WCM - Config. 2 —a—With WCM - Config. 3 — Sitting — Standing — Walking

Fast Walking — Safety

Gust Wind Sp Location

Walking

L • Speed

N

S

Proposed -

--With —11P—With Wcm - Config 2

--a—With WCM - Config. 3 Sitting

E

30N-19-0042-TRP-6763321 -2

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Vi 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street. Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 21

Walking

N

Gust Wind Speed Location 22

Walking

N

—.—Proposed - Config. 1 —40—With WCM - Config. 2

WCM - Config. 3 Sitting Standing Walking Fast Walking

— Safety

—0—Proposed - Config. 1 tWith WCM - Config. 2 f With WCM - Config. 3

Sitting Standing

— Walking — Fast Walking

— Safety

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•—•— Proposed - Config. 1 —6--With WCM - Config. 2 —*—With WCM - Config. 3

Sitting Standing

—Walking - Fast Walking —Safety

—e—Proposed - Config. 1 D—With WCM - Config. 2

WCM - Config. 3 Sitting Standing Walking

— Fast Walking ■•■Safety

ViPaC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street. Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 23

Walking

N

Gust Wind Speed Location 24

Walking

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Vi 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street. Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust W Location

Speed ocation 25 Walking

- Proposed - Config. 1 —0—With WCM - Config. 2

WCM - Config. 3 — Sitting

Standing — Walking — Fast Walking —Safety N

S

Gust Wind Speed Location 26

Walking N

—s—Proposed - Config. 1 —0—With WCM - Config. 2

WCM - Config. 3 Sitting Standing Walking

— Fast Walking — Safety

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Vipac 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 27

Walking

—.—Proposed - Config. 1 tWith WCM - Config. 2

WCM - Config. 3 — Sitting — Standing — Walking --Fast Walking — Safety

Proposed - Config. 1 t With WCM - Config. 2 —lb-- With WCM - Config. 3

Sitting Standing Walking

— Fast Walking —Safety

Gust Wind Speed Location 28

Walking

N

30N-19-0042-TR P-6763321 -2

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ViN1C 484 Swan Ply Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 29

Walking

N

S

Gust Wind Speed Location 30

Walking N

—41—No Landscaping - Config. 2 --With Landscaping - Config. 2 —a— With Landscaping - Config. 3 — Sitting — Standing — Walking

Fast Walking — Safety

—.—No Landscaping - Config. 2 --o—With Landscaping - Config. 2 —h—With Landscaping - Config. 3 — Sitting

Standing — Walking — Fast Walking — Safety

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ViPAC 484 Swan Pty Ltd ATF 484 Swan Unit Trust

484 Swan Street, Richmond

Pedestrian Level Winds - Wind Tunnel Test

Gust Wind Speed Location 31

Walking

N

—,— No Landscaping - Config. 2 —o—With Landscaping - Config. 2 —h—With Landscaping - Config. 3 — Sitting — Standing — Walking

Fast Walking —Safety

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