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Overview

The Hillside Residence project, a single-family mansion in California, Residence project stands out with its distinctive architectural features and unique shape — featuring dozens of foundation and framing details with tricky intersections and complex connections.

For this project, our client — a structural engineering company — requested the ORIGIN team to generate an accurate structural BIM model. The model had to provide the structural engineer with a clear 3D perspective of how the project would look in real life and offer a clear understanding of which structural elements required coordination with the architectural design.

Input: Set of structural drawings, architectural Revit model.

Project deliverables: BIM model.

Services BIM, STRUCTURE
Subservices PDF/CAD to BIM conversion, Wood framing
Industry Residential
Object type Single-family home
Area 697 m² / 7510 ft²
Tools used Autodesk Revit
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Project stages
1. Input analysis and first iteration of modeling
2. Structural and architectural coordination with the Project Engineer and Architect
3. Modeling iterations and feedback gathering
4. Updates to the coordination model throughout the project
Challenge and requirements

The building incorporated a mixed frame of steel and wood over a concrete basement, with an infinity pool extending over a steep rock slope. Its complex shape, combined with difficult soil conditions, made this project a structural task of above-average complexity for the ORIGIN team.

Additionally, since one of the main project goals was to help the architect see their limits for potential redesigns and project improvements, close cooperation between all stakeholders, including engineers and architects, was a must.

Hence, over the course of the project, ORIGIN went through an impressive total of 11 iterations of updates — reflecting the complexity and dynamic nature of the design process, all handled with top-notch expertise.

Structure/Architecture
Input analysis

Our team received an initial set of structural drawings along with the architectural Revit model. We thoroughly reviewed every element and relevant detail to develop a BIM structural model containing all primary load-bearing elements.

After completing the first iteration of the BIM model, our ORIGIN experts coordinated it with the architect and engineer — seeking feedback and making further adjustments based on it. This same process was applied to all subsequent iteration rounds.

Revit model animation

Keeping up with the revisions

As the pace of the project intensified, a variety of design updates and clarifications led to frequent drawing revisions. Keeping the coordination model constantly up to date became crucial — since effective coordination is only possible when models from all disciplines reflect the latest design changes.

Therefore, iteration after iteration, our team kept the model current, ensuring that the engineer and architect could always communicate real coordination issues and improve their designs without interfering with each other’s work.

To detect changes and communicate any coordination issues effectively, our team used overlay comparisons on each update iteration. This allowed us to quickly identify where changes occurred and what was modified, ensuring the coordination model stayed accurate and up-to-date.

Additionally, our team created coordination markups on drawings, thus addressing all necessary questions to the project engineer and architect to ensure all issues were clarified.

Coordination markups on drawings
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Our collaboration during the construction phase

Multiple revisions marked a truly close-knit, long-term collaboration: the first iteration started in October 2021, at the beginning of the structural design phase, and the final update was completed in mid-July 2024, when most of the primary structural elements were already installed.

Even during construction, design teams continue to refine and update the project. Our team stays ready to support — providing consultations and updating the coordination model as needed. The rule is simple: keep coordination models up to date. Even minor changes matter.

Benefits
Minimized risks, reduced uncertainty, and error-free construction with highly precise BIM modeling
An up-to-date coordination model you can rely on
Maximum alignment of the structural model thanks to the use of the architectural link
Streamlined decision-making enabled by proactive collaboration across all project stages
Tools used
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Autodesk Revit
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