Prai River Bridge


Perai River Bridge is a dual-three lane cable stayed bridge that straddles the Perai River in Seberang Perai, Penang, Malaysia. It is part of the Butterworth Outer Ring Road.
Designed by Dar Al-Handasah Consultants, it won the IStructE Award for Transportation Structures and the prestigious Supreme Award in 2006. Constructed by Lingkaran Luar Butterworth Sdn. Bhd. on a turnkey contract.

Project overview

The project was carried out by Turnkey contractor, Lingkaran Luar Butterworth Sdn. Bhd. The main sub-contractors to the Turnkey contractor are Ballast Needam International, IJM Construction Sdn. Bhd. in joint venture with Zublin International Sdn. Bhd. and consists of the following works:
  • Approach viaducts consisting of twenty-two long precast concrete, post-tensioned, glued segmental spans constructed by the use of an overhead launching gantry.
  • Two high, reinforced concrete cable stay pylons, with each pylon accommodating 14 pairs of stay cables.
  • A glued segmental, cable stayed main span constructed by cantilever erection method.
  • Three precast segmental exit/entry ramps constructed both by the use of an overhead launching gantry and, for some spans, a heavy duty falsework support system.
  • The dual three lane approaches on either side of the main bridge are wide, the width of the main bridge deck is and the ramp structures are wide.
  • Other items in the IJM-Zublin JV contract are the supply and erection of parapets, application of anti-carbonation paint and superstructure electrical works.