BUILDING INFORMATION MODELING
PROCESS DESCRIPTION AND REQUIREMENTS
1.1 A Building Information Model (BIM) will be developed by the Design Build General Contractor, Consultants and Subcontractors. The BIM will provide a wide range of information and visual communication channels throughout the entire project life cycle from design through project completion and facilities management. The BIM will include architectural, structural, mechanical, electrical and plumbing (MEP) systems and components integrated into virtual design and construction model shared by all project stakeholders. The BIM will convey conceptual, schematic, design development and final design concepts and details, construction logistics and sequences, detailed MEP systems and elements for fabrication and installation, and a model that accurately reflects final as-built conditions for use by the facilities maintenance organization.
The Design Build General Contractor shall develop a schedule showing the phases of the BIM development throughout the project life cycle including relationships to milestone budget, user review and construction activities.
2 Architectural and Structural
2.1 The Design Build General Contractor and architectural and structural consultants will provide a BIM during all phases of the project from conceptual design through project completion. The architectural and structural BIM shall be developed using, but not limited to, software applications such as Revit, Archicad, Tekla and must be compatible with Navisworks software for integration into a single model for viewing and clash detection.
2.2 The level of detail included in the structural and architectural BIM will increase as the project develops from conceptual through final construction documents and MEP fabrication and installation phases. The Design Build General Contractor will provide specifications describing in detail the requirements for the BIM during the project and design stages. The General Contractor shall specify the organization and naming conventions of model elements to enable an efficient use of the model throughout the project life cycle including the organization of the model for export into a 4D schedule simulation software, and for organization of an operation and maintenance database of documents associated with model elements for use by LACC facilities groups.
2.3 The structural BIM developed during the construction documents phase of design shall include all structural elements such as spread footings, grade beams, drilled piers, elevator pits, and slabs, and all shell structural elements including walls and decks, structural steel beams, columns, shaft framing, connector plates, and braces. Conceptual and schematic structural BIM development may not require the foundation elements or detailed connection and brace details to be shown. The conceptual and schematic BIM will be used primarily to communicate primary design concepts to the LACC user and campus groups.
2.4 The architectural BIM developed during the construction documents phase of the design shall include all architectural elements such as building exterior skin, interior walls, doors, ceilings, casework, full height framing studs, overhead ceiling and equipment supports and compression posts. Conceptual and schematic architectural BIM development may not require wall framing, overhead supports, casework or detailed door elements to be shown. However, the conceptual and schematic BIM shall include basic elements of the building skin to communicate primary design concepts to the LACC user and campus groups.
3 Schedule Simulations
3.1 The BIM shall be incorporated into “4D” schedule simulations that link the Primavera schedule to the BIM and depict the project site, topography, roads, pedestrian walkways, construction of foundations, shell structure and building exterior skin. The 4D simulation will serve as an advanced means of providing a visual description and simulation of the construction schedule for periodic review by LACCD user and campus groups. Simulation software such as, but not limited to, Synchro or Navisworks Timeliner shall be used to develop the simulation. The simulation shall show planned construction activities and sequences including crane and major equipment placement, progressing on a weekly basis. It is expected that the 4D schedule simulation will be developed when the design development BIM is complete, updated at 100% construction documents, and updated one month before foundations begin. A total of three (3) simulations shall be required.
4 BIM Quality Control
The Design Build General Contract shall provide a specification for BIM quality control to establish the requirements for the accuracy of the BIM for structural, architectural and MEP systems and elements. The sizes and dimensions for elements included in the BIM shall be properly depicted including, but not limited to, structural elements, beam and column sizes and positions, wall thickness and room dimensions, piping, ductwork, conduit, equipment, bracing and supports. All BIM disciplines and systems shall agree upon a common reference point before the BIM development begins.
5 BIM MEP Detailed Construction Model
5.1 A Building Information Model (BIM) will be developed by the mechanical, electrical, plumbing and fire protection design build consultants and subcontractors to produce a fully coordinated and detailed three-dimensional model that has resolved all spatial interferences and conflicts between building elements and systems. The BIM will be developed with the participation of all MEP disciplines in a collaborative process.
5.2 In addition to BIM, the design build MEP consultants and subcontractors shall provide 2-D drawings sets for review and approval.
6 BIM MEP Scope
6.1 The schedule start of the BIM work will be determined during the initial planning phase meetings immediately after contract award and will be in conformance to the bid document schedules. This BIM development will include, but not be limited to, the placement, elevation and conflict resolution of:
6.1.1 HVAC piping, valves, hangers and seismic bracing.
6.1.2 HVAC dry side and wet side equipment.
6.1.3 Plumbing waste and vent, domestic water.
6.1.4 Electrical conduits greater than 1 inch, cable tray and all racked conduit systems, hangers and seismic bracing.
6.1.5 Lighting fixtures.
6.1.6 Electrical panels and distribution equipment.
6.1.7 Fire protection piping and seismic bracing.
7 Software Applications, Process and Infrastructure
7.1 The BIM work product will be developed with true solid modeling, object oriented software such as Cad-Duct, Revit, Quickpen DuctDesigner and PipeDesigner, AutoSPRINK or other such software applications. LACCD will not restrict the specific software that is used except that it must be a true 3D object application compatible with NavisWorks clash detection software.
7.2 The NavisWorks software will be used extensively by all MEP design build consultants and subcontractors to both view the combined trades BIM and to identify and track spatial conflicts between systems. File naming conventions will be established during the initial BIM planning meetings.
7.3 The Design Build General Contractor will have the lead responsibility to produce weekly an updated and combined NavisWorks model. Clash detection meetings will be held each week to identify and resolve spatial interferences. These weekly meeting will be facilitated by the General Contractor Mechanical Manager and the Mechanical subcontractor who will identify a qualified individual to work with the Mechanical Manager to document that all trade interferences are tracked and resolved.
7.4 The weekly meetings will be full day working meetings during which conflict resolution will be completed, to the extent possible, during the meeting. Each of the subcontractor’s detailers will meet together to view the BIM projected onto a common screen. All identified conflicts will be published using NavisWorks, and as changes are made during the meeting to resolve conflicts, on the individual detailer’s computer, the revisions will be uploaded into NavisWorks to confirm conflict resolution. The working meeting approach described above is intended to maintain the BIM coordination schedule to achieve a coordinated BIM at the conclusion of the scheduled coordination drawing phase. Other coordination meetings methods and approaches may be proposed and must be approved by LACCD.
7.5 For each MEP discipline, a lead detailer located shall purchase a NavisWorks license that includes the Roamer, Publisher and Clash Detector modules. This use of the NavisWorks software by multiple detailers is required to maintain the schedule by identifying and resolving conflicts on a daily basis and to provide a common platform for technical communication among all team members working together daily.
7.6 LACCD, in conjunction with our consultant, will provide a single session class, combined for all detailers, to explain and demonstrate the basic NavisWorks clash detection methods.
7.7 The communications and file sharing hardware and software systems utilized will be established and configured immediately after the contract award and. It is likely that more than one system will be utilized to create the most effective methods for sharing and storing BIM and CAD files.
8 Project BIM MEP Coordination Lead: The General Contractor will lead the BIM MEP coordination process in partnership with the mechanical, electrical contractor, plumbing contractor, and fire protection contractor. The General Contractor will host and lead regular weekly coordination meetings. All MEP trades must attend these meetings.
9 BIM MEP Coordination Schedule: The General Contractor will prepare and maintain a pre-construction BIM coordination schedule with coordination submittal milestones that meet the overall construction schedule. The General Contractor will obtain input from all consultants and subcontractors participating in the BIM process to ensure that a realistic and mutually agreed upon pre-construction schedule is achieved. Coordination drawing development, coordination submittal drawing submission, review by LACCD, fabrication duration, and delivery lead times will need to be included in a manner that supports the project construction schedule.
10 File Transfer and Collaboration: The General Contractor will be required to establish an electronic workspace using an FTP site or other means, such as an onsite server, that will be established for the purpose of efficient and timely transfer of coordination files. The workspace will provide a location where the current CAD and BIM drawings, coordination BIM drawings, and fully coordinated submittal drawing files will reside. The MEP team members are to upload copies of their coordination files as often as necessary to maintain the coordination schedule. The General Contractor will collaborate with all consultants and
Subcontractors to develop a standardized file name structure for the project.
11 Resolution of Interferences: At the mandatory regular coordination meetings, the General Contractor, using Navisworks software, will provide a means to electronically identify, track and publish for distribution interferences between all affected trades. It is required that the General Contractor utilize Navisworks coordination and spatial review conflict and clash detection software to provide “real time” solid object views of the structure, architectural and MEP components. Coordination interferences will be resolved in the coordination meetings using the clash detection feature of the Navisworks software.
12 Submittal and Coordination Sign-off Drawings: Once all conflicts have been resolved and the structural, architectural and MEP systems have been fully coordinated, each consultant and subcontractor is to provide fully annotated drawings of their respective systems in PDF format for submission to the Architect / Engineer of Record for review and approval. Upon final revision a copy of the fully coordinated coordination submittal drawings are to be signed by each participant and will become the official “Coordination Sign-off Drawings.” These drawings are to be stored by the General Contractor on the project site and will form the basis for resolution of any future field installation conflicts. Components not installed where shown on the “Coordination Sign-off Drawings” or installed but not shown, will be relocated by and at the expense of the offending party. Cost for rework, re-coordination, or schedule impact required to accommodate components not shown on or not installed in accordance with the “Coordination Sign-off Drawings” is to be paid by the party in non-compliance.
13 Qualifications of BIM Personnel: It is the responsibility of all Consultants and Contractors to have or obtain at their cost the trained personnel, hardware, and software needed to successfully complete the BIM 3D coordination phase of the project. Personnel participating in the design/coordination efforts of the project must be proficient in the use of all hardware and software required.
14. Final As Built BIM: An As Built BIM will be completed and delivered to LACCD for use by the campus facilities groups. During BIM development and during construction the following information shall be included with the BIM objects:
14.1 For all MEP systems include the ability to highlight an element in the Navisworks model and link the element to the object size, elevation manufacturer, and O&M manual.