The fifth floor also benefits from floor to ceiling glazing on three elevations, opening up the space to impressive views while flooding the fifth floor of 100 St John Street with an abundance of natural sun light. The frameless glass external walls were designed and installed by IQ Projects who worked closely with the architects to achieve elegant, frameless effect glass walls with neat silicone joins in between each pane and back painted glass spandrel panels.
The fifth-floor glass design also featured frameless glass dormers that protruded vertically beyond the plane of the pitched roof. This structural glass dormer window design was used to increase the usable office space as the roof height was extended out further that the existing roof structure. The frameless corner windows were constructed from three vertical panes of frameless structural glass, three frameless glass roof panes and two panes of shaped frameless glass for the sides of the protruding glazing. Tee frame sections were installed along the silicone joins between each glass pane to support the frameless glass dormers and to maintain the contemporary, minimalistic aesthetic.
Heat soak testing was specified for all the fifth-floor glazing which is a method that reduced the incidence of spontaneous breakage to toughened glass caused by nickel sulphide inclusions (NSI). Heat soaking is a process that changes nickel sulphide particles back to their original low temperature state to reduce the risk of the inclusions increasing in volumes, causing stress within the glazing that can cause spontaneous breakages. Heat soak testing helps to decrease the risk of an NSI as nickel sulphide contaminated glass panes are usually destroyed during this process, therefore reducing the risk of a spontaneous breakage on-site.
Various single Schueco casement doors were installed within the fully glazed facades of the fifth floor to provide access out onto the terrace and for ventilation throughout the office. The Schueco doors were finished in the same RAL colour as the joins between the glazing to provide a cohesive aesthetic to the architectural glazing design and frameless glazing detail.
PRODUCTS: Structural Roof Glazing, Architectural Glass Facades, Commercial Door Systems
TYPE: Commercial
LOCATION: 100 St John Street, London