WTA explains its winning conceptual design entry to PSALM design competition

August 28, 2019



Alyana Acacio

The rapid densification processes happening in Manila expose the tension between economic efficiency and environmental consciousness. In March 2019, the Power Sector Assets and Liabilities Management Corporation (PSALM) announced a design competition to develop their Diliman property into a high-rise mixed-use development, integrating retail and office spaces. The design contest also specifically required the entries would have to integrate into such development the existing two buildings designed by the National Artist Leandro V. Locsin, in compliance with the National Cultural Heritage Act of 2009. WTA Design Studio’s winning entry is a multi-dimensional people-oriented and environmentally-friendly business center that integrates energy-efficient systems and innovative design ideas. 

A view of the Quezon City Memorial Circle
Building a dynamic development at the intersection point of Quezon City’s thriving areas

The site 

The Diliman site, located in Quezon City’s central business district (CBD), will be an accredited economic zone that will also host the offices of PSALM, the National Power Corporation, TRANSCO and other energy-related agencies. Given the accessibility and centrality of the site’s location, the development is set to be a major anchor for the city. The 5.19-hectare property is located at the intersection of Quezon City’s Diliman, Bagong Pag-Asa, West Triangle, South Triangle, and Pinyahan. It is easily accessible through different public transportation along EDSA, Quezon Avenue, and Agham Road making it a strong hub. 

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The development aims to create centrality and convert the East Grid into a major anchor point for the city

The Concept 

‘The East Grid’ is a masterplan development proposal named after its location in the East Triangle. The word ‘grid,’ of course, represents power grids representing the four major power sector companies it will host, as well as Locsin’s grid of columns. 

WTA synthesized five main design points in master planning the Diliman site. The first is the East Grid as a gathering point or hub. Second is the dialogue between old and new which WTA hopes to achieve by enhancing the presence of the Locsin building through open courtyards and grid reflections on-grid and mass. A multi-dimensional landscape is central to creating a holistic high-rise development. Engaging and active green spaces throughout the vertical floor space of the development will create a rich and dynamic program. This works in conjunction with the firm’s other design goals—to enhance work, life, and health through biophilic open spaces. 

Encouraging relationship and connectivity between user and nature through bridges and decks
Integrating a multidimensional landscape extends the greenery vertically to create diverse community experiences

WTA’s design scored high with the judges for its focus on sustainability. The design embodies energy-efficient systems and innovative and sustainable design ideas. The East Grid integrates pedestrian-friendly spaces, interactive installations, bike trails, green promenades, alfresco spaces, and play areas into a development that will ensure a net leasable space of about 400,000 square meters. 

The sacred garden is a heavily dense area with large indigenous trees that act as the buffer of the whole masterplan. It is the last part of the journey in between the spaces where one is greeted with the majestic reflection of the big trees.
The adaptive reuse of the Locsin building as retail spaces turns them into gateways into the East Grid. The entire site is pedestrian-friendly and people-centered. Adjacent levels open up via atriums creating urban canyons that act as funneling channels


A wooden waffle grid was chosen to complement the timber construction of the podiums and the extension of the Locsin grid. High-performance glazing on low-emissivity glass reduces glare and heat gain as well as allows the towers to blend into the sky. In addition, wind, water, and energy are integrated into holistic and forward-thinking development.

Engaging creativity and culture at the neighborhood and district scale as well as attracting people from far and wide
Flexible and copious office spaces to attract commerce and finance

New technologies are introduced to the East Grid as part of its sustainability strategies. Porous concrete and other pervious surfaces are integrated into landscaping materials at ground level and on open-air decks as part of the rainwater harvesting system. In addition, strategically located Solar PV panels atop the open-air decks generate power for the development. 

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The East Grid 

WTA’s proposal highlights the journey as the tying element to the different components of the site. The journey is not only physical and spatial—the experience of exploring the East Grid is also symbolic. The Locsin grid is used to inform the landscape and circulation paths as a way of creating a conversation between the past, the present, and the future. The gridlines of the Locsin building are used as a starting point to design the landscape. They are extruded outwards into the spaces to create dynamic circulation paths. Copious amounts of plants and greenery are integrated not only on the ground plane but on multiple levels as well. The gradual transition of activities from active to passive can be experienced as one move throughout the open spaces. 

Offering opportunities for biodiversity and city activity in the area by conserving the existing mature trees and adding indigenous vegetation to revive the existing ecological fauna and flora in the area
Interwoven open spaces create a porous and continuous pedestrian access throughout the East Grid.

Pedestrian pathways running through one end of the site to the other allow for pleasant walks and afternoon breaks, conversations at courtyards in between the towers and Locsin buildings, as well as a seamless shopping and dining experience, day and night. The experience of walking alongside the Locsin buildings is extended and emulated through high arcades underneath the towers. These retail arcades are accentuated by curved, flared columns that complement Locsin’s massive, angular roof eaves. 

READ MORE: Forging Modernism: The early years of Leandro Locsin

The new development aims to invite mixed-use activity that will turn the site into QC’s Central Business District
The wood baffles are a playful reaction to the masses: breaking up the volumes, providing efficient sun shading and a distinct character
Building connections through bridging different amenities, offices and playground.
The columns from the Locsin building inform the massing and facade baffles of the East Grid.

The East Grid maximizes commercial and retail space while integrating and honoring the site’s heritage structures. Locsin’s buildings are characterized by a floating mass and prominent roof distinguishing the buildings architecturally while functionally expressing tropical design. Both evoke a feeling of calm and stability as one walks under their large roof eaves, appreciating views of the surrounding greenery and open space.

Emphasizing value of green spaces as part of the urban working Filipino lifestyle
Engaging creativity and culture at the neighborhood and district-scale as well as attracting people from far and wide

Four new towers joined by bridges house the companies’ new offices, modernized and made more spacious, and other offices for lease. From the ground plane (horizontal), the elevated plane (vertical) creates a multi-level experience through layers of spaces for wellness, culture, community and business office development. The bridges themselves act as both a visual and programmatic focal point. These floors house amenities and recreational spaces that once existed on-site, representing the strong sense of community among the companies through different events and activities initiated by its employees over the years. It is this enriched life beyond work that serves as the highlight of the development.

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