ESC101- Engineering Science (Praxis I)- Team 05 Assessing design features, compatibility with codes and standards, and possible improvements Emma Chan | Francis Cruz | Matt MacKay
Presentation Contents 1.Background (Francis) 2.Bridge Dimensions (Francis) 3.Handrails (Francis) 4.Ease of Crossing (Emma) 5.Aesthetics (Emma) 6.State of Repair (Matt) 7.Miscellaneous (Matt)
Background Location: South of Toronto Harbor, part of chain of islands called Toronto Islands Type: Truss Arch Bridge Purpose: Provides a path from the Toronto Island Park to Centre Island
Centre Island Map
Bridge Dimensions
Handrails Designed for elegance, safety Toronto Accessibility Guidelines (1.1.5) Continuous on both sides- Yes Mounted: between 865mm and 965mm – actual: 982 mm Child could put head through gap Improvement: abandon vase shape for less attractive rectangles
Improved Handrails
Ease of Crossing Toronto Accessibility Guidelines (1.1.8) Free of protruding objects, overhanging signs, and branches Allowable protrusion at height of 2130mm Tree overgrowing onto bridge could hurt pedestrians Improvement: Remove tree entirely or trim regularly
Aesthetics Tourist destination, should be attractive Vase shaped pillars + attractive green painting Improvements: Repaint vase pillars to cover rust Remove graffiti
State of Repair Bridge is designed for durability- steel painted to reduce air exposure Ontario Structure Inspection Manual (2.5): Masonry (Fair Condition) No cracks on stone walkway and protrusions Small signs of splitting Ontario Structure Inspection Manual (2.2): Concrete (Fair Condition) Hairline cracks on handrail (less than 0.1mm) Light signs of pop-outs
State of Repair (continued) Ontario Structure Inspection Manual (2.3)Steel (Fair Condition) Corrosion – light severity Loose rust formation on surface No cracks and deformations Improvement: Fill in cracks and holes concrete or plaster Scrape off rust and repaint steel
State of Repair Improvements Ideal ConcreteIdeal Stone Masonry rethane/classic/mamposteria/large/Regular%20Stonemasonry% 2013%20-%20Italian%20White.jpg content/uploads/2009/10/concrete-block-elevation.jpg
Miscellaneous Electrical box located close to bridge compromises safety Improvement: change box’s location to other side of the bridge Axle load: fraction of total vehicle weight resting on a given axle 6 tonnes per axle likely to not be exceeded by a golf cart Improvement: make sign more readable to average person, add another sign to the other side of bridge
Improved Sign WARNING! LARGE VEHICLES NOT ALLOWED ON BRIDGE
Bibliography Ontario. Transportation Engineering Branch. Bridge Office. Ontario Structure Inspection Manual: OSIM. By Ministry of Transportation. [St. Catharines, ON]: Ontario Ministry of Transportation, Bridge Office, Print. Toronto. Diversity Management and Community Engagement. Strategic and Corporate Policy/ Healthy City Office / Chief Administrator’s Office Toronto: Diversity Management and Community Engagement, Strategic and Corporate Policy / Healthy City Office, Chief Administrator's Office, Web..