Land Transport Authority
Boon Lay Extension (MRT Line)
The Boon Lay Extension is a mass transit project that consists of two identical
elevated stations located in the center median. The primary design goal was to
have a column-free platform, giving commuters an unobstructed view of incoming
trains. To accomplish this, a vault shell structure was chosen for the roof.
The complex roof geometry created multiple nodes, each bringing together six
steel sections to form a series of diamond-grid frames. The undulating shape
caused every node to connect at a slightly different angle. Structural engineers
used the MicroStation 3D model to calculate loads, determine the sizes of the
steel members, and detail the node connections that were then later used by
the steel manufacturer to fabricate the roof during the construction stage.
New York State Department of Transportation
I- 87 Exit 6 Single-Point Urban Interchange
Albany, New York, United States
The New York State Department of Transportation (N YSDOT) replaced a
diamond interchange and 50-year-old bridge carrying Route 7 over Interstate
I- 87 in Albany, N. Y., with a $43 million bridge and single-point urban
interchange (SPUI) that will improve traffic conditions. Designing the state’s
first SPUI on an interchange bridge was difficult, but the overwhelming
challenge was maintaining traffic during construction.
N YSDOT used MicroStation and InRoads to save time and money through
efficient data, drawing, and payment documentation sharing throughout design
and construction. Project Wise enabled all teams to share files and information
as well as collaborate among multiple teams. MicroStation and InRoads were
used to generate the quantities and the pertinent supporting drawings for
payment documentation. They were also used in the field by construction
personnel for design changes.