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Cannon Place, London

Cannon Place, London

Structural Steel Protection - Case Study

CASE STUDIES > CANNON PLACE, LONDON

Cannon Place, London

Client: Hines & Network Rail
Architect: Foggo Associates
Construction Manager: Laing O’Rourke 

SCOPE OF WORKS: 
Cementitious Fire Spray Systems: 4,000m2 Grace Monokote® Z-146 and Z-106
Boarded Fire Protection Systems: 10,000m2 Promat TD Board and Promat Promatect® -250
Thermal Insulation: 1,000m2 Rockwool Soffit Slab and Promat TLFR Soffit Board  

Cannon Place is located above the Cannon Street rail station in the Central London Financial District.  Having acquired the long leasehold interest in London’s Cannon Centre, Hines formed a joint venture with Network Rail to remodel the mainline and underground stations at Cannon Street.  

The aim of the project was to create both Grade A office accommodation and retail space in a prime City of London location, utilising a striking architectural design, achieved through an eight-story office building.  

The Cannon Place development required provision of a structural steel protection works package to protect the structural steel beams and columns that form the office building’s structure.  In addition, thermal insulation was required for the soffits and ceilings between the office building and the station retail space located underneath.  The new building was to achieve a BREEAM rating of ‘Very Good’.  As well as high demanding environmental requirements, the station was to remain operational at all times during the construction works.

Using its vast knowledge of passive fire protection systems, Sharpfibre worked alongside the construction team and architect on the buildings fire protection design, specifying 10,000m2 of Promat TD Board and Promat Promatect® -250 as the boarded fire protection solution for the structural steel.  In addition, a further 4,000m2 of Grace Monokote® Z-146 and Z-106 cementitious fire spray was specified for the elements of the structural steel framing that were exposed to external conditions.  Finally, the thermal demands of the project were satisfied by the design and installation of 1,000m2 of Rockwool Soffit Slab and Promat TLFR Soffit Board achieving a U-value of 0.20 W/m²K.  

Sharpfibre were able to deliver the project on time, assisting in the creation of 398,110 square feet of Grade A office accommodation and 8,120 of retail space.  The installation achieved the required BREEAM rating of ‘Very Good’ and the development of the Cannon Street station was recognised at 2013 National Rail Awards, where it won ‘Large Station of the Year’.  

Works began in January 2010 and were completed in March 2011.  

Related Products and Services disciplines:

Insulation // Structural Steel Protection

PRODUCT INFORMATON

Cementitious Fire Sprays

Cementitious fire spray is a fast and efficient method of providing up to 240 minutes fire protection to structural steelwork. Used in the commercial, petro-chemical and tunnels markets, cementitious fire sprays withstand impact and abrasion, yet remain flexible to accept design changes without incurring major cost and time delays. 

Cementitious fire sprays may be applied within environments where limited exposure to the elements is likely throughout the building phase of the project. They can also be used for application to steel and concrete frames, metal floors or roof decks and return air plenums.

Thermal Insulation

The installation of phenolic, mineral wool or glass fibre insulation boards satisfies the thermal insulation performances currently set out in Part L of the Buildings Regulations. Phenolic materials offer the thinnest solution, whereas mineral wool or glass fibre materials offer a lower cost option.

Various finishes are available, including plain facing, or an aluminium foil face, where the finish is more demanding. A calcium silicate facing board is available with these materials and is particularly suited where the insulation could be exposed to impact.

Boarded Fire Protection Systems

Boarded fire protection systems offer a non-combustible and cost efficient method of providing up to 240 minutes fire protection to structural steelwork. As the original means of affording structural fire protection, this method has seen major developments in the types of boards available today. 

Boarded fire protection systems can be durable, resistant to water and beneficial to acoustic performance.  Certain fire boarded systems are able to accept decorative applications, such as paint or plaster, providing an aesthetic finish without the need for further preparation.