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The best example in the case of the AGC Glass Building was the question of the building’s extension. halfway through the con- struction of the shell (October 2012), it was decided to increase the available oor area by 1,000 m2.This was followed by two further extensions, resulting from a change in the occupancy density (the number of employees per m2).The requirement for this extension was related to the rapid growth and shrinkage of AGC staf ng levels. At the time the decision was taken, the available statistics showed that the design had already reached its maximum capac- ity.This meant that there would be no room in the building for
any extra staff that might be needed, and so an extension was necessary.This decision not only had consequences for the organi- zation of the plan, but also had a major impact on the building’s fragile energy balance and the related integration of the technical infrastructure. Because the building team (i.e., all the partners) approached this new reality in the right frame of mind, shared the same values and adopted a problem-solving approach, the nec- essary extension, and the project as a whole, were successfully completed.
table 3. Work time in hours of the architects and engineers, the Van Roey engineers and all contractors and subcontractors on site
y axis: hours worked per month x axis: time
Workers
Engineers VR Execution Engineers VR Preparation Engineers
Architects
1 Submission of tender
2 Preparation period
3 Start of the work
4 Collective building holidays
5 the ‘extension’ episode
6 Realization period
7 Delivery
8 aftercare
may 2012
2012
2013 2014
2012-05
Site preparation and groundwork
Foundation posts and foundation basement
massive concrete slabs and columns on ground level; shell work basement First- oor slab
Concrete core activation in oor slabs Second- oor slab
Roof slab
Assembly main staircase
Steel structure gallery
Roof covering
Exterior woodwork and bamboo facade covering
Wooden terraces and interior gardens Second facade in glass panels
Technical installations in shafts or under the raised oor Installation of raised oors
Drywall partitions and spray-plaster ceilings
Lifts
Interior woodwork
Wood ooring and carpet
Kitchen and restaurant
Technical installations in basement; BTES eld; PV panels
Surround works Delivery