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CONCEPTUAL IDEA

CONCEPTUAL IMAGES

CROSSING BOAT The idea behind the design of the new bridge is to create an easily assembled and visually interesting structure that is adaptable to the existing site constraints. The structure comprises two beams supported by two props on either side, four props in total. These props appear to reach out for one another from either side of the riverbank. Each prop is attached to a concrete element poured in situ supporting the entire structure and providing lateral stability. The whole structure can be fabricated off-site in components of manageable size for transportation purposes and simple connections. The new bridge is located in close proximity to the existing bridge. The new proposed span is shorter than for the existing bridge. Moreover, the new location will enable the existing bridge to be used while the new bridge is being built. EXPLODED VIEW The dynamic form and changing rhythm of the bridge components was inspired by the structure of a boat gently placed or floating by a river bank. Handrail

Steel mesh SITE PLAN

Timber planks 19 Ex 90 ist 0 in g m s m pa ap n pr ox

Structural vertical members

Pr o 17 pos 50 ed 0 m ne w m ap s pa pr n ox

Structural horizontal members

0

1

2

3

4

5m

Cross-bracing

Timber beams

Timber props

Footings

A CROSSING BOAT


CONSTRUCTION METHOD The “crossing boat� bridge has been designed taking into account construction methods and erection sequence borrowed from traditional timber construction. Four concrete footings are required to support the props and the timber beams at either end of the bridge. Timber primary beams are split in three sections for transportation purposes. It is envisaged that splices would be completed on site and be required to maintain full strength of the section in view of loading requirements. Splicing of timber beams can be achieved by bolting steel plates to the timber beams. These steel plates could be concealed on the inside or visible on the outside of the timber beams, or both could be used which would result in thinner plates and half as many bolts as required in a single-plate connection. The key construction operation is the erection of the props and the connection of these with the beams. Ideally, props would be connected to the concrete footings on either side by a pinned base connection and raised to their position using a pulley system built on site.

CROSS SECTION

SIDE ELEVATION

Alternative approach to timber beams & props

A CROSSING BOAT

Team No.47 A Crossing Boat  

Team No.47 A Crossing Boat

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