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Contractors World UK & Ireland Vol 6 No 1

35

Prefabricated

Design

InfraCore Inside bridges come fully prefabricated, in any

colour. They are finished with an epoxy-bonded wear

surface that doesn’t rot, corrode or degrade over time.

Multiple bridge segments can be joined to create a

variety of bridge widths. When required, bridges can

also be constructed in conjunction with other materials,

such as using an InfraCore Inside deck on a primary

structure in steel or concrete.

This combines the best of both materials. Due to the

use of these innovative composite materials the bridges

come with a 50 year guarantee and have been tested to

survive for 100 years.

The low weight of the prefabricated bridges bring a

number of considerable advantages. One is that only a

simple foundation is needed, often a shallow foundation

suffices, such as a precast concrete slab.

They are easy to transport and can be installed quickly

with a light crane. Also, since the bridges float, they can

be transported to the project site on the water, which

is especially advantageous in restricted areas where

access via road is prohibitive.

All of these are considerations which will be impor-

tant to local and district authorities working hard to get

their local communities operating successfully again as

quickly as possible.

Versatile and Adaptable

InfraCore Inside bridge decks are installed on a new,

existing or refurbished substructure. They provide a

watertight, durable, lightweight and fatigue-resistant

alternative to steel, concrete or timber decks.

The structures meet the loading requirements as set

out in Eurocodes and the decks are finished with an

epoxy-bonded wear surface.

The low self-weight of the bridge decks brings a

number of interesting cost-saving advantages.

• In movable bridges a lighter deck means that the

support structure can be lighter, that the mass of the

movable part is reduced, which in turn reduces the

weight and size of the counterweight and the foun-

dations that support all this.

• In refurbishments the replacement with a lighter deck

reduces the weight, allowing the supports to be re-

tained while at the same time the loading allowance

can be increased.

The closed deck protects the substructure from de-ic-

ing salt and other contaminants. FRP does not rot or

corrode, and it is insensitive to fatigue. It has load-car-

rying capacity in two directions, thus ensuring alternative

load paths.

InfraCore Inside bridge decks

• Max. distributed loading: 6000 kg/m

2

• Max. weight of vehicle: 60 tonnes

• Max. length: 27 meter

• Max. width per element: 8 meter

The design depends on the loading, allowable struc-

tural depth and spacing of the intermediate supports,

as well as specific weight-restrictions. Specific detailing

such as curbs and integrated ducts are also possible.

A typical traffic bridge deck refurbishment or new-build

bridge

• Loading: Eurocode LM1 (60 tonnes vehicles,

30 tonnes axle loads + 9kN/m

2

)

• Intermediate spacing of sub-structure:

maximum 3m

• Deflection limit: span/350, for spans of 3m

• Structural depth: 80mm

• Weight: 80kg/m

2

[cw]

InfraCore Inside road

bridges come fully pre-

fabricated, in any col-

our. They are finished

with an epoxy-bonded

wear surface. Multiple

bridge segments can

be joined to create

wider bridges.

Contractors World UK & Ireland