Engineers say dismantling Grenville should begin next year


0

An illustration of Grenfell Tower support, from the Atkins report As the weather continues to degrade the tower’s cracking block and fires, more props will be installed this summer, but now is the time to make an emotionally difficult decision to demolish, engineers say. The Department of Housing released a report commissioned by consulting engineer Atkins. This concludes: “There is unanimous agreement and unequivocal advice from all the technical experts and engineers involved in the Grenfell project that the tower should not be supported in the medium to long term, but rather that it should be dismantled as soon as possible, as dismantling begins. No later than May 2022. This advice is based on protecting the safety of workers in the tower and the residents around it. The Department of Housing then screened Atkins’ work by John Roberts, the chief structural engineering manager at rival Jacobs. It endorsed the recommendation that the Grenfell Tower should be removed after the safety work had been completed. Temporary supports throughout the building were installed in two phases. The first stage strut was installed immediately after the fire to the most affected areas observed at the time to enable emergency response. A support system for Phase 2 was then installed to provide more reassurance and facilitate investigation, inspection, access control and removal of “debris”. The pillar designer, Cantillon, designed the strut to distribute the load across several floors, using the residual power of the undamaged floors. Due to the amount of plants in the basement and obstructions at the lower levels, it was not possible to extend this support to the basement. Cantillon advised that the Stage 2 prop is nearing the end of its design life and therefore it became necessary to introduce a more robust complementary support system. This supplementary support system is designed to reduce the risk of collapse and facilitate the floor by dismantling the floor of the building in a timely manner after the decision is made. Installation will begin in summer 2021. If the government delays a decision, the basement will need support as well. The Atkins report states: “The key point from an engineering perspective is that if a decision is not made to move smoothly to disassembly at the earliest opportunity, and is currently scheduled in May 2022 upon completion of the installation of Phase 4 from floor to surface, then it must be Also completing the support to the basement at a similar time scale, but a little late to the completion date of these works for a few months will not make a fundamental difference.The main problem is that, if necessary, the support to the basement must be in place by the end of August 2022, i.e. Before the onset of winter. Obviously, this must be confirmed with the successful prime contractor upon their hiring (scheduled for May 2021) regarding the latest date they will need to direct them to start / complete the basement works. ”Atkins’ assessment is that making a decision in early fall 2021 to move smoothly To disassembly would accommodate that, however, if the new principal contractor considers that an operational decision is needed sooner to fulfill these revised timelines which should be given further consideration. The Grenville Tower in West London caught fire on June 14, 2017, killing 72 people. The fir wood spread much more quickly than expected because the building had recently been refurbished with flammable cladding and insufficient fires. The cladding system served as a flame accelerator and smoke channel. It quickly became clear that this renovation – and many other renovations across the country – had used products that were not fit for purpose and did not meet building regulations. Do you have a story? Email [email protected]


Like it? Share with your friends!

0

What's Your Reaction?

hate hate
0
hate
confused confused
0
confused
fail fail
0
fail
fun fun
0
fun
geeky geeky
0
geeky
love love
0
love
lol lol
0
lol
omg omg
0
omg
win win
0
win
Joseph

0 Comments

Your email address will not be published. Required fields are marked *