T h e A p p l i c a t i o n o f B I M i n V o l u m e t r i c C o n s t r u c t i o n
63
Currently methods have been developed to automate the design process using BIM with
an emphasis on energy efficiency and optimum structural design, and to further
encapsulate BIM in the BMS layer to generate simulation assisted maintenance and
control strategies. Furthermore, a BIM methodology proves to be useful for management
of modular building structures and project planning.
1.1 Benefits of BIM for Volumetric Construction Workflow
Figure 1: Traditional Enemetric Workflow
Enemetric in collaboration with The University of Edinburgh, recently have developed
ways of automating the design of modular structures using BIM,
including new methods
to automate the design of modular steel frames from existing architectural drawings.
Previously this was achieved by hand, where a draftsman would meticulously work on
several CAD drawings, creating the volumetric modular structure by dividing the building
into variable sized rectangular cuboid modules, representing the steel frames. Once this
stage is completed the drawings are passed to a structural engineer who would carry out
the necessary structural calculations and design to conform to Eurocode regulations.
Finally once the structure of the steel is determined, an estimation team will use the data
to estimate the cost of the steel and materials, and pass on the details to the supplier to
make the order.
This process, with data passing through several hands is time consuming, taking up to
one working day. Now, using BIM methodology, only one 3D CAD drawing is required
and the above processes are automated, using a single piece of software, with results
produced in less than an hour. Techniques have been developed to mark out in the
original CAD drawings, placement of individual modules, which when input into the
software, full structural design is carried out using Finite Element Analysis, a detailed
report is generated describing each module that makes the building, and a virtual mock-
up is created in Sketchup, complete with internal framing and external finishing including
windows and doors. Crucially, the software outputs the estimate for the steel, allowing
for very rapid, accurate, quotations to be generated very quickly, reducing the time and
cost of estimation prior to sales.
