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PROJECT NEWS | NASC YEARBOOK 2012
CASSETTE BEAM BRIDGE SPANS HUGEDISTANCE IN CITY CENTRE
The Bulgari Hotel & Residences, Knightsbridge,
London NASC member: JDC Scaffolding Main contractor: Sir Robert McAlpine
prime development’s bulgari Hotel and Residences, with its 85 rooms and suites, will offer a unique combination of refined amenities and exclusive services. The hotel will also feature a large ballroom, a private cinema and a 2,000sq m spa and fitness centre with 25m indoor pool. Sir Robert McAlpine was awarded the main contract in February 2010. JDC Scaffolding was awarded the scaffold challenge which included limited time, crane
restrictions and party wall and airspace agreements with adjoining residential properties. JDC was required to bridge over the south and west elevations. How do you successfully span
24m and 16m respectively? To find the answer JDC, with Sir Robert McAlpine and RDG Engineering, developed a bespoke cassette frame constructed from unit and ladder beams. The engineers had to take into consideration that the scaffold would be used for stone work and associated trades with loading requirements and that a hanger and a further 10 lifts of fully- boarded scaffolding would be built from it.
The cassettes were delivered to site and firstly craned to the roof in two sections. Each section was joined on the roof to form a 26m and an 18m unit. These were then checked for compliance with design criteria by RDG’s engineers.
Teams of scaffolders were positioned on each floor to guide each beam cassette into their fixed position sitting on banks of ‘I’ beams, taking care that the unit cassettes did not swing excessively out of line. The two elevations spanned were completed in one day.
TEMPORARY ROOFING STANDSTO ATTENTION
Royal Military Academy,
Sandhurst NASC member: Deborah Services Ltd Main contractor: Interserve*
the contract scaffolding division of Deborah Services Limited (DSL) secured a contract to provide a temporary roofing system and access scaffold on the Former Army Staff College at the Royal Military Academy, Sandhurst. The project has been technically challenging and DSL’s onsite teams have demonstrated their expertise in design and engineering whilst working on this iconic building. The Omni Roofing system is unique to Deborah Services
with no cranes required for the erection and dismantling of the system. The Structure of the Former Army Staff College has been standing for over 100 years and is a Grade 1 listed building, therefore no physical ties were fixed into the building. The project required 180 tonnes of suspended scaffolding in the courtyard area, using the principle of the flying shore technique (rarely used in present day). The scaffold provided the necessary support for both the access and the roofing system, without bearing on the fragile low level roofs below. The Royal Military Academy
was founded in 1741in Woolwich to train gentlemen cadets for
the Royal Artillery and Royal Engineers, and later for the Royal Corps of Signals and some for the Royal Tank Corps. It remained there until it was closed on mobilisation in 1939. The Royal Military Academy Sandhurst was formed in 1947. It was descended from two older institutions, the Royal Military Academy (RMA) and the Royal Military
College (RMC). DSL Contract Scaffolding director Tony Mileham says the company is “proud to work on such an iconic British military institute” and added: “We have demonstrated our design and engineering capabilities, adapting them for such a complex and challenging
project.” *This contractor has a ‘NASC only’ policy
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