Effective June 1, 2022 – Changes to the Pedestrian Level Wind Study
A Pedestrian Level Wind Study (‘Wind Study’) is a technical report that provides a model and written description of the wind impact of a development. The Wind Study will inform and direct the development design to be wind responsive, and ensure that wind conditions in and around the development are appropriate at various times of the year. The City’s Pedestrian Level Wind Study Guide document provides additional requirements.
A Pedestrian Level Wind Study deals with the mechanical and safety effects of wind on people and how conducive it is to pedestrian use of outdoor areas in the city. The purpose of the Study is to reduce undesirable wind activity, allow proper air circulation and to create comfortable spaces that encourage outdoor pedestrian usage throughout the year. Thermal comfort is further addressed in Official Plan policies.
The City will require a Wind Study for a Zoning By-law Amendment if the triggers below are met.
The City may require a Wind Study for the following application types:
“Triggers” refer to properties or circumstances of a project, such as (but not limited to) the scale, massing, height, location, density of surroundings and proximity to important areas, are known to be contributing factors for noticeable wind impacts surrounding a proposal under review. The City’s Pedestrian Level Wind Study Guide document identifies categories of triggers, including: height related to geographical location, and additional (special) conditions such as context.
If the application meets the conditions specified under the list of triggers, then Wind Study/Studies would be required for the project.
Project height triggers are classified into three levels – Low, Moderate and High– and are related to the location of the project. A Wind Study will be required for developments over six storeys / 20 metres in height. Following the Height Trigger classification of the project, if one or more of the following apply to the project, the project will shift to the next higher Trigger Level.
A written report documenting the Wind Study and conclusions must be provided. The report must comply with the requirements and format provided in the Pedestrian Level Wind Study Guide document. Template A should be located at the front of the report.
The report should include the following:
If applicable/required, Peer Review.
Wind Study reports should present the following scenarios:
The study may include the following:
If the City is not satisfied with the level of experience demonstrated by the consultant or wishes to verify the results of a study, a peer review of the Wind Study may be required by the City. The cost of the peer review is to be borne by the applicant.
Effective June 1, 2022 – Changes to the Sun/Shadow Study
To provide a visual model and written description of the impact of shadows cast by a proposed development on surrounding streets, parks and open space (including natural areas), privately owned publicly-accessible spaces and other properties. The Sun/Shadow Study is done to evaluate the impact of shadows at various times of day, throughout the year.
A Sun/Shadow Study may be required for the following applications for developments over six storeys / 20 metres in height:
A Sun/Shadow Study may also be requested for developments that are less than 20 metres, in particular for Rezoning Applications where additional height is applied for near shadow sensitive areas (such as parks and open spaces, schoolyards, cemeteries, etc.). The requirement for, and scope of this work, should be discussed with the Planner and Urban Designer during Pre-Application Consultation meetings.
The Sun/Shadow Study may need to be resubmitted as part of the Development Review Process if changes to the building siting, massing and design are proposed and/or recommended.
Sun/shadow testing of alternative building massing may be required during the application review process to assist in making decisions about how to best achieve Council’s goals regarding sun/shadow impacts.
A typical model will include all streets, blocks, parks and open spaces, as well as buildings to a distance adequate to show the shadow impacts during requested times.
The model will be presented in two parts, the first showing the existing conditions and the second showing the proposed development in its context. The proposed development context should include other approved but not yet constructed buildings within the model area. These should be graphically distinguished from the proposal and the existing built context.
Shadow diagrams should be provided in colour to a standard metric scale and include a bar scale on each sheet labelled in 1, 2, 5, 10, 20, 100 and 200 metre increments.
“As-of-right” or other site-specific applicable shadow conditions should be indicated clearly by a contrasting colour single-line overlay with explanatory notation provided in a printed legend, using the City’s Shadow Study Drawings Standards – Colour Analysis.
A Sun/Shadow Study should be done for March 21 and September 21 at hourly intervals between 9:18 am and 6:18 pm. All times are based in the Eastern Time Zone and must take into account Daylight Saving Time.
Development that proposes additional shadow impacts on parks and open space (including natural areas), will require supplementary sun/shadow tests at hourly increments for June 21st and December 21st to provide additional information on the impacts of shadows. Additional times may also be requested to respond to specific site contexts.
The Sun/Shadow Study will include: