CC1805

CASEstudy
Models can be used for showing, for
example, how walls to be brick laid are
distributed and how complex is the
brickwork. As work phases and material
quantities are easy to calculate and
visualise, this information can be used in
procurement negotiations to get better and
more accurate quotes. The numerical
information can also be utilised in cost
accounting to estimate how much a
building element or entity will cost.
"We have a good Tekla model and a lot of
useful information in it. It provides us with
the quantities, kilograms, concrete cubic
meters, and square meters needed in cost
calculations. The model provides
quantities for the schedule, and the
schedule and model can be linked to each
other. This makes it easier to plan the work
and communicate with subcontractors,"
Janne Salin explains. Janne continues:
"Without the model, we would have to
spread out a large pile of drawings and
use a ruler to measure the height and
thickness of a column, and a calculator to
determine the required concrete volume.
Using the model saves time."
TRIPLA IN FIGURES
3D models have also been used to verify
the feasibility of solutions, for example by
examining the possible hauling routes of
escalators into a building.
The 3D models have also been imported
to a virtual environment, which brings new
ways of using designers' models. The
office space under construction, for
instance, uses virtual glasses. Based on
the architect's IFC model, a virtual
environment has been created for
presenting the premises to customers, and
offices can be seen both empty and
furnished with objects from a 3D content
library. With the virtual environment and
wearing the virtual glasses on the site, you
can visualise what the finished space will
look like. At the other end of the scale,
wearing virtual glasses, you can virtually
climb into one of the site's eight cranes
and see what the site below looks like.
These are major benefits for building
contractors, or for possible tenants making
a leasing decision, and for also for YIT.
Using their own models means that they
don't need to order numerous
visualisations from visualisation agencies.
SOFTWARE COMPATIBILITY IS
ESSENTIAL
In a major project such as Tripla, it is
crucial that software packages are
compatible. The project is a good example
of what a large site means for
collaboration and the open BIM approach.
There are several design and architectural
offices working on Tripla, and the project is
divided into four main sections, each of
which has its own 3D models, such as the
architect's model, the structural designer's
models, and the HVAC and MEP models.
There are almost 100 information models
in total. The compatibility of such a great
number of models is crucial for the project.
The aim is to ensure all parties involved
in the project can use all the information
the project's designers and contractors
have produced. Collaboration enables
users to take advantage of crucial
opportunities, which would otherwise be
unavailable with just one software solution.
Tripla confirms that The Open BIM
approach really is the key to a successful
building project.
www.trimble.com
The construction phase of the project started in summer 2016
A railroad station, a shopping centre, two 12-storey office wings and one 14-storey office wing with office space totaling
50,000 m2, a hotel, and an event area
Two 12-storey residential buildings with more than 400 new homes
One new railroad track and a reservation for a subway line
Total commercial space 115,000 m2, of which 85,000 m2 for lease to approximately 250 companies
The shopping centre and the station will be completed in 2019, the office and residential buildings and the hotel in 2020
In 2020, about 7,000 people work and 1,000 people live in Tripla
May/June 2018 17