Welcome [] · 2020-01-04 · 2. Welcome –TTC Chair 3. Presentation –TTC Staff 4. Facilitated Question and Answer 5. Next Steps. Donlands and Greenwood Second Exits Public Consultation

Welcome

Donlands and Greenwood StationsSecond Exits

Public Consultation Meeting

Monday July 12, 2010

Donlands and Greenwood Second Exits Public Consultation Meeting July 12, 2010

1

Agenda

1. Introductions – Facilitator (LURA)

2. Welcome – TTC Chair

3. Presentation – TTC Staff

4. Facilitated Question and Answer

5. Next Steps


2

Presentation

1. Background

2. TTC Options Considered

3. Public Options Considered

4. Conclusions


3

Background

• Subway stations were not part of the Ontario Building Code until 1993

• Ontario Building Code applicable to new construction only

• Retained Fire Life & Safety expert, Harold Locke, LMDG & Associates Ltd. to evaluate existing subway stations egress risk


4

LMDG Study Criteria

• OBC 3.12 (now 3.13) and NFPA 130 requirements for new construction

• 2 means of egress from each platform• independent and remote• from platform to point of safety (ie. exterior of station)• separated at platform level >25 metres

• Platform Evacuation Time• “Occupant Load” clear off platform in 4 mins.


5

LMDG Study Findings

• Identified 14 High Priority subway stations

• Lacking second means of egress

• Include Greenwood and Donlands Stations


6

TTC Response

• Additional funds included in the Fire Ventilation Upgrade project in the 2003‐07 Capital Program to provide second means of egress at 14 stations

• Project Design Objective• provide alternate means of egress from platforms

• Evacuate “Occupant load” to safe environment as quickly as possible


7

Project Design Principles

• Second exits shall be remote and separate (minimum 25 m) from existing egresses

• Design shall consider the proximity of existing vent shafts and potential for contaminated air recirculation

• Exit shall be for daily use • “Dead end” distance should be a maximum of 25m


8

Project Design Principles

25m minimum


9

Exit Stair Widths

• Design stair width to ensure emergency air velocity does not exceed code requirements• Stairs off platform – minimum 2.4 m wide

• Stairs to street from one platform - minimum 2.4 m wide

• Stairs to street from two platforms - minimum 3.5 m wide


10

Other Egress Options Considered

• Emergency exit building• Passengers unfamiliar with exit may not find or use it in

an emergency• Stairs in vent shafts

• Insufficient space • Risk of exposure to smoke• Unfamiliar exit for passengers

• Stairs to hatches at street level• Unfamiliar exit for passengers • May not be reliable in emergency


11

Options Screening Criteria

1st Screen• Project objective/design principles

2nd Screen• Neighbourhood Impact

• Property requirements

• Constructability

• Security

• Cost


12

Greenwood ‐ TTC Options

OPTION 1

OPTION 2

OPTION 3

OPTION 4

OPTION 5

OPTION 6

LEGEND

2 3 5

1

6 1,4

FIRE VENTILATION UPGRADE PROJECTSECOND EXIT

DONLANDS AND GREENWOOD STATIONS

13


14

CriteriaOption 1

Two Daily Exits at 253, 255, 252, & 254 Strathmore

Option 2One Daily Exit at

244 & 246 Strathmore









Neighbourhood Impact

Severe(2)

Severe(2)

Severe(2)

Severe(2)

Severe(2)

Severe(2)

Property Requirements

Severe(4)

Moderate(2)

Moderate(2)

Moderate(2)

Moderate(2)

Moderate(2)

ConstructabilityBetter(0)

Worse(2)

Worse(2)

Neutral(1)

Worse(2)

Better(0)

SecurityBetter(0)

Worse(2)

Worse(2)

Neutral(1)

Neutral(1)

Better(0)

Total 6 8 8 6 7 4

OME Construction Estimate (Property excluded)

$5.0 M $8.5 M $8.5 M $7.5 M $10.0 M $7.5 M

Ranking 2 5 6 3 4 1

Greenwood – TTC Options


15

Greenwood ‐ Public Options


16

Greenwood – Option P1



17

Greenwood ‐ Option P1

Insert drawing showing option


18


Greenwood - Option P2


19




20




21


Greenwood – TTC Additional Option


22

CriteriaOption P1

One Daily Exit at 9 Linnsmore

Option P2One Daily Exit on

Danforth

TTC Additional Option

Daily Exit Stairs on Strathmore

TTCOption 6

Project Objective Design Principles

Neutral(1)

Worse(2)

Neutral(1)

Better(0)


Moderate(1)

None(0)

Extreme (3)

Severe(2)


Moderate(1)

Moderate(2)

None(0)

Moderate(2)

ConstructabilityWorse(2)

Extreme(3)

Neutral(1)

Better(0)

SecurityNeutral (1)

Worse(2)

Worse(2)

Better(0)

Total 6 9 7 4


$10.0M $20.5M $8.9M $7.5 M

Ranking 2 4 3 1

Greenwood – Public Options


23

Conclusions

Greenwood Second Exit:

• Public Option #1 located on Linnsmore Cres. is acceptable to the TTC

• TTC will proceed with this option

• Should some unforeseen conditions arise, then TTC will revert to its preferred option and advise the community


24

Insert drawing showing all options numbered

Donlands ‐ TTC Options

2 5,6

1,3,4 2

OPTION 1

OPTION 2

OPTION 3

OPTION 4

OPTION 5

OPTION 6

LEGEND1,3,4 2

5

6

2


25 TORONTO TRANSIT COMMISSIONENGINEERING & CONSTRUCTION BRANCH

25


26

CriteriaOption 1

One Daily Exit at 1 & 3 Strathmore

Option 2Two daily Exits at 9, 10, 11, & 12 Strathmore

Option 3One Daily Exit at 1 & 3 Strathmore

Option 4One Daily Exit at 1 & 3 Strathmore


14 & 16 Strathmore


14& 16 Strathmore


Moderate(1)

Severe(2)

Moderate(1)

Moderate(1)

Severe(2)

Severe(2)


Moderate(2)

Severe (4)

Moderate (2)

Moderate(2)

Moderate(2)

Moderate(2)


Better(0)

Neutral(1)

Worse(2)

Worse(2)

Worse(2)

SecurityNeutral(1)

Better(0)

Neutral(1)

Neutral(1)

Worse(2)

Worse(2)

Total 6 6 5 6 8 8


$9.0 M $5.5 M $7.6 M $8.0 M $7.0 M $8.5 M

Ranking 4 2 1 3 5 6

Donlands – TTC Options


27

Donlands ‐ Public Options


28


Donlands ‐ Option P1


29


Donlands – Option P2



30


Donlands – Option P2


31


Donlands ‐ Option P3


32


Donlands ‐ Other OptionsEast & West of Dewhurst


33

CriteriaOption P1

One Daily Exit at TPA Parking Lot

Option P2One Daily Exit at

17 & 19 Dewhurst

Option P3One Daily Exit on Dewhurst Curb

Lane

Other OptionsOne Daily Exit on

East Side of Dewhurst

Other OptionsOne Daily Exit on West Side of Dewhurst

TTCOption 3

Project Objective Design Principles

Worse(2)

Worse(2)

Neutral(1)

Worse(2)

Worse(2)

Better(0)


Minor(0)

Minor(0)

Severe(2)

Minor(0)

Minor(0)

Moderate(1)


Minor(0)

Moderate(2)

Minor(0)

Moderate(1)

Moderate (1)

Moderate(2)


Worse(2)

Worse(2)

Worse(2)

Worse(2)

Neutral(1)

SecurityWorse(2)

Worse(2)

Neutral(1)

Worse(2)

Worse(2)

Neutral(1)

Total 6 8 6 7 7 5


$13.1M $10.9M $8.5M $9.6M $11.1M $7.6 M

Ranking 4 6 2 3 5 1

Donlands – Public Options


34

Conclusions

Donlands Second Exit:

• Public Option #3 located on east of Dewhurst Blvd. beside and immediately west of 1 Strathmore Blvd. is acceptable to the TTC

• Subject to City’s acceptance of road narrowing and associated community traffic impact, the TTC is prepared to proceed with Public Option #3

• Should this option not be workable, then TTC will revert to its preferred option and advise the community


35

Construction Mitigation Measures

• Construction Impacts will be investigated in detail during the detailed design

• Typical measures include:• Construction site safety

• Traffic planning and staging

• Pre and post construction surveys of properties

• Noise bylaws

• Vibration monitoring during construction

• Dust control measures during construction


36

END OF PRESENTATION

Documents

Welcome [] · 2020-01-04 · 2. Welcome –TTC Chair 3. Presentation –TTC Staff 4. Facilitated Question and Answer 5. Next Steps. Donlands and Greenwood Second Exits Public Consultation