Excerpt: HasleTre by Oslotre AS is a sustainable architecture project with a mass timber framework and a flexible 5×5 m grid system supporting various plans like cell offices, open workspaces, meeting areas and smaller rooms. HasleTre is a 3,000-square-metre building with five stories, a basement and roof terraces. The goal was to design a commercial structure that was inventive, flexible, and ecologically sensitive and could be disassembled and reused.
Project Description
[Text as submitted by architect] HasleTre, the recipient of Norway’s distinguished Wooden Building of the Year 2022 award, serves as a pioneering model of sustainable architecture, driven by the imperative to combat climate challenges and shape a resilient future. Rooted in environmental consciousness, adaptability, and innovation, HasleTre not only meets functional needs but also slashes greenhouse gas emissions by 60% and secures the coveted BREEAM NOR Excellent certification.
Nestled at the outskirts of Oslo’s central city, HasleTre spans 3000m² over five floors, including basement and roof terraces. The directive was to craft an ecologically conscious, versatile, and inventive commercial structure designed for disassembly and reuse.
The structure boasts a mass timber framework, featuring a flexible 5×5 meter grid system accommodating varied plans like cell offices, open workspaces, meeting areas, and smaller rooms.
Yet, the journey wasn’t without challenges. Navigating the nexus of avant-garde construction techniques, materials, and regulatory compliance demanded meticulous equilibrium. Garnering widespread support for the disassembly and reuse concept necessitated comprehensive communication to elucidate its enduring benefits.
The commitment to disassembly materialized through meticulous component planning that facilitates both future assembly and disassembly. A primary and secondary framework designed around standard production formats and dimensions, coupled with minimal perforations through raw elements, curbs material waste and optimizes transport volumes.
Ingenious timber-to-timber connections, such as glulam columns and beams joined with beech dowels, and CLT walls and slabs utilizing X-fix connectors, culminated in a steel-free construction system. This timber-centric approach curtailed steel use by over 80% compared to concrete alternatives, while adaptable technical solutions enhance longevity.
The interior predominantly features exposed wood, cork, and wool elements, with wooden nails used instead of screws for attachment. Harnessing the hygrothermal properties of these organic materials, the building aims to curtail energy consumption, enhance occupant well-being and focus, and mitigate sick leave instances.
The project integrates a substantial proportion of reused and upcycled materials, including ventilation aggregates, acoustic ceiling plates, and secondary room flooring. Moreover, 60% of the furniture constitutes upcycled pieces, while the remaining 40% incorporates biodegradable materials or industrial waste like ocean-harvested plastics.
Designed for durability and spatial-technical flexibility, HasleTre was remarkably erected in a record-setting nine-month span.
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