Complex Free-Form BIM Modeling & Coordination
PROJECT ADDRESS : LEHBAB, DUBAI, UAE
CONSULTANT : NAD ALSHIBA ENGINEERING CONSULTANTS
BIM MODELING: DBPDC BIM
Building Envelope BIM Modeling : SATABIM
Location: Dubai
Status: Under -Construction
Year:2025
Area:1700m2
1-Project Overview
Located in Dubai, UAE, this 1,700 m² two-story emergency response facility and fire station is designed to integrate operational efficiency with complex architectural geometry. The building accommodates rapid-deployment apparatus bays and operational spaces on the ground floor, with administrative, crew, and support facilities located on the upper level.
Commissioned under the consultancy of Nad Alshiba Engineering Consultants, the project required advanced digital workflows, multidisciplinary coordination, and precise architectural integration to achieve a fully coordinated design in compliance with international technical standards.
1-2-Structural System
The project is supported by a primary structural steel frame designed to accommodate its complex free-form geometry. Steel detailing and shop drawings were developed using Tekla Structures, ensuring fabrication accuracy and efficient on-site assembly. The structural system incorporates rigid bolted connections, reinforced concrete pedestal supports, roof bracing, and a secondary steel purlin framework that transfers façade loads to the main structure while maintaining overall stability.
1-3-Architectural & Façade System
The building functions as a two-story fire station, combining operational spaces on the ground floor with administrative and crew facilities above. Its exterior envelope features 25 mm GFRC panels arranged in a 600 × 1200 mm modular grid, supported by a secondary steel framework. The façade assembly integrates waterproofing, rock wool and fiberglass insulation, and movement joints to deliver durability, thermal efficiency, and weather resistance while adapting to the building’s complex geometry.
2-Parametric Optimization
Prior to the BIM development phase, the complex free-form shell geometry was computationally optimized under the parametric design leadership of Eng. Aminkhani. Utilizing Rhinoceros, Grasshopper, and Galapagos evolutionary algorithms, the building envelope was rationalized through a multi-objective optimization process addressing surface curvature, structural performance, and panel layout while establishing a standardized modular grid.
This optimized geometric framework provided a precise foundation for BIM integration, fabrication efficiency, and accurate on-site assembly.
Following the parametric optimization phase, the project was developed in Autodesk Revit as a detailed Building Envelope BIM model. Translating the complex doubly-curved geometry into a fully constructible digital environment required advanced conceptual massing workflows and custom 9-point adaptive components.
This methodology enabled the GFRC cladding panels and secondary purlin framework to precisely follow the free-form shell while maintaining structural offsets, joint requirements, and fabrication tolerances. Through adaptive families, LOD development, and seamless coordination with the Tekla-based structural steel model, the complex design was transformed into a fully coordinated and fabrication-ready BIM deliverable.
3-Building Envelope BIM Modeling
Façade Development
Modeling the complex building envelope required a multi-layered BIM approach to transform free-form geometry into a fully constructible façade system. The exterior skin consists of custom GFRC panels following the double-curved roof and façade geometry. A secondary steel purlin grid, fabricated from 50×50 mm SHS sections, provides the structural interface between the cladding and primary frame while integrating insulation and waterproofing layers to ensure accurate alignment, thermal performance, and weather resistance.
Beyond 3D parametric geometry, a core deliverable was extracting high-precision 2D shop drawings, structural section cuts, and fabrication details directly from the BIM environment. Utilizing customized Revit templates and strict LOD requirements, every interface between the GFRC panels, steel purlins, concrete pedestals, and structural steel members was thoroughly detailed. The extracted plans, elevations, and enlarged joint sections provided the construction team with exact spatial references, dimensional tolerances, and panel layout grids, bridging the gap between digital modeling and field execution.
4 – BIM Strategy & Collaboration
To transform the complex free-form shell geometry into a fully constructible BIM deliverable, a structured parametric workflow was developed in Autodesk Revit. Using conceptual massing environments and custom 9-point adaptive components, the envelope system was driven by reference grids and geometric parameters.
This methodology enabled the GFRC panels and secondary steel framework to adapt accurately to varying surface conditions while maintaining dimensional consistency, module coordination, and joint continuity throughout the façade assembly. The workflow supported effective multidisciplinary collaboration and ensured seamless integration between architectural, structural, and fabrication requirements.
Achieving precise alignment between the GFRC façade sub-structure and the primary load-bearing frame required seamless BIM interoperability. The main structural steel framework, modeled and detailed in Tekla Structures, was integrated into the Revit environment for multidisciplinary coordination.
Through automated clash detection and spatial coordination workflows, potential hard and soft clashes between purlins, moment connections, bracing members, and architectural elements were identified and resolved during the pre-construction phase. This process minimized field conflicts, reduced rework, and improved fabrication and installation accuracy.
5-BIM Execution Strategy
Managing a project of this architectural complexity required a unified BIM execution strategy based on centralized worksharing and standardized data structures. Custom shared parameters, dynamic schedules, and automated workflows were implemented within Revit families to manage quantities, panel identification, and material information.
This collaborative framework enabled synchronized multidisciplinary modeling, improved data reliability, and delivered a fully documented digital asset aligned with international BIM standards.