Merdeka 118

Kuala Lumpur, Malaysia

A suite of wind engineering and building physics studies to support designers in building the world's second tallest building

Merdeka 118 is a 118-storey, 678.9-metre-tall skyscraper. Built at a cost of $1.5 billion USD, the mixed-use structure stands as the world’s second-tallest building. With construction starting in 2015, the tower topped out in 2021 and is expected to open in late 2023.


  • The Challenge

    The sheer magnitude of a structure like Merdeka 118 requires studies to get it safely off the ground. Wind loading and wind-induced motion are important considerations for the designers of any tall building, and these studies were particularly significant for a structure as tall as Merdeka 118. RWDI’s team of multi-disciplinary experts provided a one-stop shop for many of the wind engineering and building physics services required.

  • Our Approach

    RWDI was initially engaged with the Merdeka 118 project and the surrounding complex in the early design stages and has been involved ever since. Our knowledgeable professionals:

    • Evaluated multiple permutations and alternative shapes for the main tower during wind loading studies to reduce wind forces on the structure
    • Further aided with the design of the tower by providing additional wind engineering and building physics studies, including cladding wind loads, pedestrian level wind, aeroelastic testing, and a stack effect review
    • Conducted wind loading studies and aeroelastic testing to evaluate the stability of the spire — which at 160 meters in height is taller than many buildings — and to provide wind forces for design
    • Supported the design of the podium of the tower — a retail mall covered by a large dome — with services such as pedestrian level wind, structural wind loads, and cladding wind loads
    • Studied the potential for heat build-up under the dome and worked with the designers to formulate strategies to improve thermal comfort in the retail area.
  • The Outcome

    The services RWDI provided aided in finalizing the design of Merdeka 118. We continue to work on the project and are currently focused on the three residential buildings at the base of the tower.