Unlocking new levels of BIM benefits for Developers, By Juan Pablo Acastello.
636 North Juanita Avenue is a 33-unit, luxury multifamily development located in the Silver Lake area of Los Angeles.
Cumming Group, the Construction Cost Management Rep of Barth Partners, brought Corbis to implement BIM technology for coordination during the design phases for faster and more accurate design delivery. A well-accomplished design by Aaron Brumer and Associates, working together with a solid team of consultants, deserved the best possible outcome.
How did you introduce this to the team?
My job as a Project Manager was to assemble all the pieces together -technical and emotional. In situations like this, we find it paramount to have open and candid conversations where matters can be discussed without pointing fingers.
By presenting our Management/BIM/Coordination approach, the team -that was new to BIM- easily understood the benefits of utilizing this technology to find and solve issues.
When was this done?
In this particular job, we started the One-Round BIM Coordination process at about 60% CD. Whilst we recommend implementing this earlier when possible, the benefits and outcome proved that it is never too late -unless it’s been already built, of course!
Lateral BIM view of Juanita Avenue.
What was the approach?
Working with Cumming Group’s project manager, we devised a simple strategy to maximize the use of our time: to begin with a thorough review of the documentation and to use our ‘Clash Detection Probability Heatmap’ to spot areas with more likelihood of issues.
We received the architectural model and prepared it for the One-Round BIM Coordination process, and we modeled all engineering models. Then the process can begin.
BIM Model view of Structural and MEP disciplines.
How do you manage coordination?
Our coordination approach was two-fold:
- PLAN COORDINATION REVIEW
- BIM CLASH DETECTION
The Plan Coordination Review is a traditional review of all drawings the way they are intended to be sent to the job site, which typically spots miscoordination between drawings of different disciplines.
The BIM clash detection is the product of the visual and analytical process, where the BIM Models of all disciplines are carefully merged to detect any potential clash or coordination problem, as well as other matters like programming and foreseeing construction sequencing issues.
BIM view of a typical Juanita Ave unit.
How long does this take?
It may change from project to project, but assuming all parties are engaged in the process and information is readily available, it may take between 4 and 6 weeks to model, clash, report, and solve issues. This is done along with the natural development of the project so it doesn’t have a negative impact on the design schedule -but it does save significant time and money during construction.
How did the outcome look like?
Based on the first round, we were able to spot around 75 coordination issues. The most impactful findings were related to a part of the drain system that had to be re-routed, a rooftop proposed pool that had not been fully coordinated with structural and MEP, and a series of landscape features that were missing the system connections needed.
Full BIM model view of Juanita Avenue.
All problems were duly solved working with the team and we estimate the savings for the client were in the $ 350,000 range, representing around 4.50% of the construction cost, and likely 2.3 months of potential delays, based on stats from a worldwide study of one million RFIs on 1,300 major construction projects, issued by the Navigant Construction Forum.
If you have a project that has not been built, it’s not too late. Get in touch