2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 1

Rehabilitation of St. Marys Wycliffe Bridge in British Columbia, Canada

2nd International Conference on Timber Bridges Las Vegas, Nevada

2013 Sep 30 – Oct 02

Murray M. Johnson, P.Eng., PE

Buckland & Taylor Ltd.

Existing Bridge

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 2

Existing Bridge

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 3

Existing Bridge

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 4

Howe Truss Detail

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 5

Existing Bridge

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 6

Inspection: Deck Level Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 7

Inspection: Deck Level Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 8

Inspection: Deck Level Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 9

Inspection: Deck Level Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 10

Inspection: Deck Level Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 11

Inspection: Deck Level Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 12

Inspection: Deck Level Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 13

Inspection: Queenpost Truss Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 14

Inspection: Queenpost Truss Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 15

Inspection: Queenpost Truss Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 16

Inspection: Substructure Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 17

Inspection: Substructure Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 18

Inspection: Substructure Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 19

Inspection: Substructure Deterioration

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 20

Inspection: South Slope Movement

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 21

Inspection: South Slope Movement

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 22

Inspection: South Slope Movement

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 23

Inspection: Howe Truss

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 24

Inspection: Howe Truss

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 25

Inspection: Main Piers

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 26

Inspection: Main Piers

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 27

Bridge Rehabilitation Design

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 28

Required:

Double load limit to 36 tonnes

Pedestrians and cyclists to share roadway

Drastically reduce maintenance requirements

Mitigate south slope movement problem

Solution:

Remove entire deck and barrier system

Keep main Howe truss span (55m), from floorbeams down

Keep existing concrete piers

Remove both queenpost spans and all trestle spans

Build new concrete abutments and new north bent

New 28 m and 18m/18m glulam girder spans

Select truss strengthening

Complete new deck system and crash-rated barriers, cyclist height

Bridge Rehabilitation Design

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 29

New Cross-section: Howe Truss Span

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 30

New Cross-section: Glulam Girder Approach Spans

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 31

New Deck System

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 32

New Crash-rated Barrier (cyclist height)

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 33

Construction

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 34

Construction

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 35

Supplemental Floorbeams

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 36

Ready for Deck

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 37

North Glulam Spans

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 38

Construction

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 39

Stringer Installation

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 40

Decking

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 41

Glulam Girders

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 42

Glulam Spans

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 43

Truss Rehabilitation & Strengthening

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 44

Truss Rehabilitation & Strengthening

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 45

Truss Rehabilitation & Strengthening

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 46

Truss Rehabilitation & Strengthening

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 47

Truss Rehabilitation & Strengthening

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 48

Completed Bridge

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 49

Completed Bridge

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 50

Completed Bridge: Barriers

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 51

Completed Bridge

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 52

Completed Bridge

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 53

2013 OCTOBER 01

2ND INTERNATIONAL CONFERENCE ON TIMBER BRIDGES 54

Thank You For Your Attention Questions?