ESC101- Engineering Science (Praxis I)- Team 05ESC101- Engineering Science (Praxis I)- Team 05

Assessing design features, compatibility with codes Assessing design features, compatibility with codes and standards, and possible improvementsand standards, and possible improvements

Emma ChanEmma Chan | | Francis Cruz Francis Cruz | | Matt MacKayMatt 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

http://www.gtaimages.com/media//TorontoIslandMapSmall1.gif

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

http://pimg.tradeindia.com/00263435/b/0/Bridge-Railing-with-Cable-System.jpg

http://www.astroeng.com/images/bridge-railing-big.jpg

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 Concrete Ideal Stone Masonry

http://www.elnia.com/images/products/wallpaper/stone_polyurethane/classic/mamposteria/large/Regular%20Stonemasonry%2013%20-%20Italian%20White.jpg

http://studio-tm.com/constructionblog/wp-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, 2000. 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, 2004. Web. <http://www.toronto.ca/diversity/pdf/accessibility_design_guidelines.pdf>.