CAN uses innovative rigging to mount a blue whale skeleton exhibit
Project summary
In 2017, CAN, an RSK company, created an updated display for a historic exhibit of a blue whale skeleton for the Natural History Museum. Using innovative techniques, engineers mounted the 85–year–old skeleton onto the roof trusses of the Hintze Hall. CAN helped to create a magnificent exhibit for visitors of the Natural History Museum to enjoy for generations to come.
READ MORE- 126 years Age of the whale skeleton
- 85 years Time displayed in the Natural History Museum
- 4.5 tonnes Weight of skeleton
- 25.2 metres Length of skeleton
The background
In 1891, a local fisherman found a gigantic blue whale stranded on a beach in Wexford, Ireland. After watching it struggle in the shallows, the fisherman put the whale down and sold its carcass for £111. The Natural History Museum later purchased the skeleton in 1932, naming it ‘Hope’. Hope was then displayed in the Mammal Hall until 2017, when the museum announced that she would be moved to form the main exhibit and become a magnificent sight for visitors as they enter the building. The aim was for Hope to act “as a symbol of humanity’s power to shape a sustainable future”.
The plan for the display was to suspend Hope and her armature from cables in a diving motion, mimicking a whale’s behaviour when feeding on krill in the wild. The construction would be anchored to the museum’s roof trusses.
RSK company CAN was contracted to complete a full dimensional survey of the Hintze Hall roof trusses and to subsequently mount and permanently install the new exhibit.
The challenges
The main challenge in this project was the immense weight of the whale. At 4.5 tonnes, this skeleton could risk overloading the old Victorian museum roof trusses while it was secured into place. CAN engineers had to find a solution to ensure the safety and stability of the exhibit.
The solutions
The team worked in the Hintze Hall while restoration work on the skeleton was carried out by curators, conservation teams and engineers in an off-site warehouse.
To avoid placing undue stress on single trusses during the installation, CAN technicians used mechanical, hand-operated Tirfor winches to make real-time adjustments to each of the ten individually manned roof truss lifting locations. They used armature anchors specially designed to swivel, allowing the display to be adjusted without overloading an individual roof truss. By adding load cells to each of the lifting rigs, the project engineers were able to communicate using Wi-Fi with a remote control station. On the ground, a CAN lift supervisor monitored the operation for optimal results. After raising, fixing and positioning Hope, CAN installed permanent cables, securing her into her new home in the museum.
The impacts
This project brought great benefit to the Natural History Museum and its visitors, creating a magnificent display to be admired for many years to come. “Hope is the only blue whale skeleton in the world to be hung in the diving lunge feeding position,” said Lorraine Cornish, the museum’s head of conservation. “Suspending such a large, complex and historic specimen from a Victorian ceiling was always going to be challenging, but we were determined to show her in as lifelike a position as possible. We are thrilled that the result is truly spectacular.”