2.4
Modeling Requirements
2.4.1
General
a.
The BIM shall be used for all site and building
systems design, development, and analysis, including but not limited to
architectural, structural, mechanical, electrical, plumbing, and fire
suppression, etc.
b.
During SD and DD Phases, BIM Technology shall be
used to develop and establish building performance, and the Basis of Design in
accordance with Owner Project Requirements (OPR). This model shall be
interoperable with analytic tools including but not limited to building
envelope, orientation, daylighting, energy consumption, building management
system (BMS), building automation systems (BAS), renewable energy strategies,
life cycle cost analysis, and spatial requirements.
c.
Use BIM authoring software element libraries
when creating model objects. Model objects shall contain parts and components
as opposed to simple 3D Geometry (i.e. walls, doors, windows, railings, stairs,
furniture)
d.
Model objects shall contain IFC parameters and
associated data applicable to building system requirements. These elements
shall support the analytic process include size, material, location, mounting
heights, and system information where applicable. As an example, a light
fixture may contain several parameters such as energy output requirements, user
illumination levels, make, model, manufacturer, bulb life
e.
Sustainable design principles and LEED Credit
Documentation shall be included in the BIM to analyze, document, and verify
project LEED Certification Goals.
f.
For Design-Bid-Build Projects, Design Team shall
provide awarded General Contractor a copy of the fully coordinated and
assembled BIM (in Navisworks or equal), as well as copies of the Authoring BIMS
for each trade (see Sec 3.2.c). These Authoring BIMS shall be used as basis for
fabrication models generated by sub-contractors. It is recommended Design Team
and Contractor establish a protocol for digital data exchange (i.e.
interoperable file formats) prior to providing these models.
g.
Design-Builder (or General Contractor in Design
Bid Build Projects) shall utilize model geometry and extract graphical
information for generating construction administration documents from the
Project BIM, i.e. RFI’s, Directives, Bulletins, Change Orders.
Construction team shall record as-built conditions in BIM as part of final
delivery to LACCD.
h.
DSA submittal drawings, calculations and
analysis shall be extracted from the Project BIM.
2.4.2
Types of Model Elements
Model elements shall be
derived from the following sources:
a.
Manufacturer’s Model Elements -
elements created by and acquired from manufacturers. It is the author’s
responsibility to display the appropriate level of detail for the design
element. Embedded performance data shall remain for analysis and specification
purposes.
b.
Custom Created Model Elements - model
elements created by the model author must utilize appropriate BIM Authoring
tool templates to create custom elements. Custom models components need to be
assigned as a part and part of a family or group.
c.
District Provided Model Elements (District
Standards) - model elements created by district appointed specialists,
containing the minimum standards set forth in this document.
2.4.3
Model-based Quantity Take-off
LACCD will not require
model based quantity take offs at this time. We will address this requirement
in later versions of this Standard as technology progresses.
2.4.4
Specifications
LACCD will not require
direct model linkage to specifications at this time. We will address this
requirement in later versions of this Standard as technology progresses.
2.4.5
Model Geographical Location
All projects will be
set to permanent campus monuments using State Plane Coordinates System,
California Zone 5, NAD 83, and NAVD 88. For additional information, reference CAD Standard 3.0, Section 8.0.
“Setting the Origin”1
2.4.6
Program Spatial Requirements
a) Spatial data should
be generated and associated with bounding elements (walls, doors, windows,
floors, ceilings).
b) Space/area schedules
and diagrams must be dynamically updated from the model geometry.
c) LACCD Spatial
Requirements must be validated using BIM Technology.
d) Each space shall
include the following spatial information:
Space type – Omniclass
Space number-Omniclass
Space name
Space description
Department
Program
2.4.7 As
Built BIM
BIM must be updated
continuously throughout the construction phase and must include all
RFI’s, as built conditions, etc. Contractor shall have modelers on site
continuously updating constructed related changes. Design Team shall update
design changes coordinated with the contractor via RFI’s and change
orders.
Upon Substantial
Completion, the Design-Builder must submit the As Built BIM to the District.
The as-built BIM shall include the following:
a.
All as-built information.
b.
Native file formats and all associated and
linked files (if applicable) with full description of how to reassemble the
model and how to extract 2D documentation, software and version number.
c.
Digital Fabrication Models (ref. sec 3.2.4.c for additional info)
d.
Any other fabrication models prepared by
sub-contractors
