Composite Arch BridgeinaBackpack System Outline 1 What How

Composite Arch “Bridge-in-a-Backpack” System Outline 1. What & How? 2. Design options 3. Overview of recent projects 4. Specific project details 5. Performance tested in Lab 6. AIT’s services “ How can we work with you? ”

What is the “ Bridge-in-a-Backpack ” System Carbon Fiber Composite + Concrete Arch Superstructure “ A Hybridge system combining benefits of high-performance composites with durability and cost savings of cast-in-place concrete” Image Credit – NY Times/University of Maine

Projects Completed & Underway Complete (7) Bridge Location/Name Description Const. Year Key Stats Pittsfield, ME – Neal Bridge Pilot Project with University of Maine 2008 29. 0’ Span 23 Arches Anson, ME – Mc. Gee Bridge Municipal Design/Build Project 2009 28. 0’ Span 9 Arches Bradley, ME – Jenkins Bridge Maine Composite Bridge Initiative 2010 28. 5’ Span 14 Arches Auburn, ME – Jenkins Bridge Maine Composite Bridge Initiative 2010 38. 0’ Span 13 Arches Belfast, ME – Perkins Bridge Maine Composite Bridge Initiative 2010 48. 0’ Span 16 Arches Hermon, ME – Tom Frost Memorial Bridge Snowmobile/Pedestrian Bridge 2010 44. 5’ Span 3 Arches Fitchburg, MA MA DOT Accelerated Bridge Program 2011 37. 5’ Span 15 Arches Under Construction (2) Caribou, ME – Farm Access Overpass Maine Composite Bridge Initiative 2011 54. 0’ Span 22 Arches Pinkham’s Grant, NH State Bridge Program 2011 24. 5’ Span 6 Arches Design & Proposal Bridges in design in ME, MI, proposals submitted in 11 states Caribou Fitchburg Belfast Bradley Status

Design Options - Headwalls Multiple options to meet the Engineering, Economic, and Aesthetic requirements of the site • FRP Panel Walls – – MSE or Through-Tied Configurations Compatible with skewed bridges Lightweight, easy to install Durable, and cost competitive • Concrete – Precast or CIP – – MSE, Through-Tied, or Gravity PC Panel, PCMG Units, Cast-in-place Versatile design options More conventional aesthetic

Headwall Options for Test-Level 4 Design • Wall-mounted Barriers – Precast or CIP Gravity Wall – Precast Panel MSE Walls

Mc. Gee Bridge Replacement Example – 28’ Span CONSTRUCTION SEQUENCE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Demo. existing steel bridge Excavate for footings Drill bedrock, form footings Arch installation Pour concrete footings Install composite decking Fill arches with concrete Erect composite headwalls Pour deck concrete Backfill bridge, install geogrid Finish grading Guardrails and cleanup 12 Days Total Construction Time Low Bid Against Steel, Concrete, Wood

A note on footings Steel H-piles Royal River Bridge, Auburn, ME Spread Footings Perkins Bridge, Belfast, ME

Caribou Connector Bridge Key Metrics • Span – 54’-2” • Rise – 12’-0½” • Rise/Span – 22% • Skew – 30 deg • 22 – 15” Diameter Arches • Arch weight ~300 lb each • Precast Concrete MSE Headwalls/Wingwalls

Caribou Connector Bridge

How we got here“Bridges to the future, now” Maine’s Composites Initiative • Six bridges in two years • Variety of bridges to best gage how system fit’s into Maine’s bridge inventory • 28 -55’ spans • Stream/road crossing • Foundation types • Headwall designs Also being used in: • Massachusetts • New Hampshire • Michigan • Proposals in 11 states & 3 countries outside the US FHWA’s Public Interest Finding: • Allows for federal funding on projects where aspects deviate from typical requirements, when in the interest of the public. i. e. in cases of “Cost-Effectiveness or System Integrity…” [FHWA] • Simple application process – approval from FHWA in as little as 2 days [FHWA Contract Administration Core Curriculum Manual, Section 3. C, http: //www. fhwa. dot. gov/construction/cqit/findings. cfm] Design-Build - Detail-Build - Value Engineering

Performance Testing: Arch Testing HL-93 Design Load Equivalent

National Recognition for Bridge-in-a-Backpack AASHTO TIG - 2011 Focus Technology 2010 Award for Composites Excellence Most Creative Application American Society of Civil Engineers 2011 Charles Pankow Award for Innovation Engineering Excellence Award Royal River Bridge, Auburn, ME (Along with Maine DOT & Kleinfelder |SEA) Product featured in: Engineering News Record, The NY Times, Concrete International, Popular Science, Popular Mechanics, The Boston Globe

Summary and Quick Facts on CFFT Arch Bridges Innovative Product Application • Rapid fabrication our facility or option to fabricate at/near jobsite • Hybrid composite-concrete system improves material performance • Steel free superstructure • Reduced carbon footprint Performance Tested • Design/tested to exceed AASHTO load requirements • Superior redundancy – safe system • Corrosion resistant materials • Field load testing indicates even greater levels of safety Cost Effective and Fast Installation • Light weight product– reduces equipment transportation needs • Erected with a small crew, no skilled labor • Performs up to 2 x lifespan of conventional materials • Accelerated Bridge Construction • Rapid design, fabrication, and delivery

What can AIT do for you? • Structural Design – AIT’s engineers design the composite arch bridge superstructure – AIT can design the bridge substructure, internally or with consultants – Optimization to maximize efficiency of structure • Supply – AIT supplies a complete engineered bridge system – Packages: arches/decking, modular FRP headwalls – Installation Oversight Daniel Bannon Structural Engineer Jonathan Kenerson Manufacturing Manager