THE China Railway First Group has been told to change and redesign bridges built along the Dreketi Nabouwalu Highway.
The directive was given by Fiji Roads Authority and MWH Global.
The change in design is to extend the durability of the bridges to more than 30 years.
FRA CEO Neil Cook said the design of the bridges needed to be changed.
"The concrete structure for the initial designs are not as durable as we intended them to be."
CRFG company spokesman Donald Singh confirmed they had been directed to change designs of the bridges.
Mr Singh said the designs earlier presented to MWH Global and FRA were designed with a maximum life span of 30 years.
"Since they have the intention of extending the durability of these bridges we have changed our designs to extend the life span of the bridges to more than 30 years. We have a total of 14 bridges that have been earmarked to be rebuilt as part of the road rehabilitation along the Dreketi Nabouwalu highway.
"FRA and MWH intend to make low maintenance bridges that can withstand pressure and this may cost more because we have to procure materials from Australia and New Zealand."
CRFG Dreketi Nabouwalu highway chief engineer Xiao Bing An said the foundation of eight bridges (out of the 14) intended for the project has been completed.
"Work on these eight bridges may take two months before the bridges can be up for normal operations.
"This however depends on the weather and the availability of materials for construction.
"Since initial works on these bridges have begun and we can assure the public that it will be completed in time."