Lark has made significant advances with BIM modeling in recent years. Using a design model from the Architect, Structural Engineer, Mechanical Engineer and Electrical Engineer a BIM model is produced. From that model costing and scheduling are created. From the consultants models we produce a BIM VICO Construction model for clash detection, constractability, scheduling and costing. These are referred to as 3D (construction Model, 4D (scheduling), and 5D (costing). This model is continually updated throughout the life-cycle of the project incorporating all revisions throughout the life of the project contract.
We utilize our proven, fully integrated 3D, 4D and 5D BIM technologies and workflow to control the project from design through to completion.
Lark has taken the initiative to be at the forefront of BIM technology in order to maximize the value that BIM brings to Owners. We call this True BIM. It starts with our in-house capability to produce accurate Construction models, building the model in detail floor by floor and adding construction means and methods. We use schedules within Revit to monitor the design development and Trimble Vico software and processes to control 4D (scheduling) and 5D (costs). Vico is the most integrated BIM software and any changes to the model automatically update the impact on cost and schedule.
The “As-Built” BIM model at a Level of Development (LOD) 500, is populated with relevant building component information such as product data, O&M manuals, cut sheet specifications and warranty data.
From Design Development to the completion of Construction Documents the models are continually compared for clash detection to assist with coordination. This clash detection process is initially run in Revit, and subsequently using Trimble Vico software. In combination with hard and soft clash detection, Lark also has an established best practice for Constructability Analysis. By building the project “virtually” in Revit using 2D drawings for reference, we are able to conduct constructability analysis, identify missing information and add means and methods. This is our Construction model. On a number of projects, we have shown to significantly reduce the number of RFIs and changes during construction.
We log and track every clash and constructability issue until each is resolved.
During construction we use the 3D models to enhance communication, and as a reference for dimensions and elevations. In congested ceiling spaces we often produce colour coded construction drawings for Mechanical and Plumbing layout, using accurate information from the fully coordinated Mechanical model.
Lark uses Vico software to produce a “Flowline” schedule for production planning and control. A flowline is a graphical representation that shows the movement of crews through locations. This is a Location Based Management System (LBMS) that uses Line of Balance theory to optimize work flow and productivity. The schedule is driven from the 3D model quantities and our proprietary database of production rates, and so any changes in the 3D model will be automatically reflected in the 4D schedule.
Vico is not only a superior planning tool, but is also highly effective in controlling the schedule during construction. Actual production data is captured every few days and the schedule calculates a forecast based on the actual production trend. This allows the team on site to be proactive and to take corrective actions very quickly if needed.
We use Vico software to generate accurate quantities from the models by location to support estimating and scheduling. The quantities are extracted directly from the 3D model and so any changes in the model (changes in design) are automatically reflected in the quantities and cost plan. This helps with cost management during design, and having accurate quantities also helps reduce waste during construction.