267 tonne steel frame set on top of a concrete structure with precast H.D. bolts. Cold rolled purlins fixed to roof steel to create a curved and dished roof profile. Which allowed a bespoke cladded roof covering to be installed.
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What were the challenges and made the project succesful?
Since there could not be any gridlines set out on site. The whole substructure was built using a total station and global coronates provided by the 3D models of the architect & engineer. The same models we used to set out the steel. This included the concrete columns, slab edges, H.D. bolts and cast in steel plates to take the fabricated tee, base connections of sloping CHS columns. The fact that Buckingham’s on site engineer and concrete contractor did an excellent job of coordinating the installation of both the H.D. bolts and cast in plates using this information meant that the steel frame which didn’t have a straight line or 90 °corner to aide erection sat in the correct location on site.
Benefits of using BIM and Tekla Structures?
This job would not have been possible without the use of the architects & engineers IFC files providing the steelwork setting out to start the ball rolling. Then in turn our own 3D model which we in turn used to provide an IFC model back to both parties which was used to confirm steel setting out. The fact that these models could be passed back and forth and inspected by all relative people was invaluable. The same models where used in site meetings when the design team would evaluate the required connection detail and assess if they worked with building finishes and other trades.