Megashor Propping

Great Northern Hotel Kings Cross to St Pancras Link

Kier appointed E P Rothwell & Sons Ltd to complete the following tasks on the Great Northern hotel

Temporary Works Design, Heavy Propping,Facade Retention Design and installation,Needling,Pull out Tests,Monitoring,Diamond Drilling,Concrete and Structural Steelwork, reinforced concrete

We first conducted pull out tests in the existing Brickwork and concrete. then we set up a monitoring system to measure any movement in the building during demolition and construction.

We then fixed the Basement propping and shoring at the lower level using RMD flying Megashor props,Maybey Mass 50 and Mabey 25 raking shores were installed to lower level basement. Titan propping was used to support the upper basement floor.

Facade Retention and Basement

We then designed and installed the facade retention to the front external walls, continuing around the rest of the building in RMD Super slim (Slimshor) and megashor equipment. Basement shoring supported the external walls using Super Slim raking props as The basement slab was removed and we proceeded to underpin the main load bearing walls. Further basement propping on the internal walls. RMD Super Slim (Slimshor) plan bracing added to the support on the external walls. Then we designed and installed permanent steel pins to shore the structural walls reinforced with rebar placed formwork and concreted in a beam at ground floor level.

We then adjusted levels of floors in building using Hydraulic jacking While this was in progress we backpropped the floors using a combination of RMD Super Slim, Alshor plus and Megashor as well as Maybey mass 25 Propping,bracing and shoring was installed on internal walls. Plan bracing was fixed to corners of the building. Tempoary work foundations were design and installed by EPR. Heavy Propping was then used to support the bigger internal floors Kier Tempoary works department and EPR continued with temporary works design .

With the Facade Retention system in place, needling commenced on the facade to enlarge openings and EPR designed fabricated and fixed the new structural steel frames.The permenant steel now in place chemical dry packing completed. The heavy propping and needling equipment was dismantled Steel pins wrapped in rebar were designed and fabricated by EPR and incorparated in the high level concrete beams. Which were lifted on Hydraulic jacks to new position.We then braced and jacked all the internal floors and walls.Stuctural steel beams were then fabricated and installed internally. The rear external elevation at the request of the client was accelerated to assist parellel projects. This involved Adjusting some of the RMD Megashor towers, To allow the RMD Super slim props and needles installed. We then demolished brickwork in openings and installed Steel frame.

This was achieved despite the orginal programme being demanding

We Completed all the Reinforced concrete as the work progressed.

Dismantling of the RMD megashor towers,slimshore plan bracing and the Maybey mass 50 Propping systems proceeded

Kier and their Client Were both very happy with our contribution, indeed the client took our Supervisor Zydrunas Jasaitus all the way to Paris for a thank you lunch. Which was very much enjoyed and appreciated.

Stan Smith the Kier project Mananger was happy with our work has recommended us on several projects since.

01753 646012