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PROPERTIES & RESIDENTIAL

GUY’S TOWER, GUY’S HOSPITAL, LONDON

Key Facts:

Client: Arup, Penoyre and Prasad
Sector: Health
Value: 46K
Survey Type: Control Survey, Topographic Survey, Measured Building Survey, 3D Laser Scanning
Area: 34 storey tower
Resources: GPS, Laser Scanner, Total Station, AutoCAD,
Project Duration: 1 month

Over View:

A prominent landmark on the London skyline, the 34-storey Tower is the second tallest hospital in the world at 143 metres high. A partnership between Arup and Healthcare Architect of the Year Penoyre and Prasad was created to implement the exterior refurbishment of the Tower by addressing issues associated with the structure, facade, windows, roof and energy use of the tower, with the aim of revitalising the prominent building using innovative solutions that are energy efficient and environmentally responsible.

Client Requirement:

-	Topographical and measured building surveys of the Guy’s Tower and its immediate vicinity at Guy’s Hospital
-	High definition surveying
-	Laser scanner capable of producing accurate data cloud images and models of structures, plans and buildings
-	3D point cloud required. Sections and elevations to be accurately interpolated from 3D point cloud data
-	Matrix grid across each elevation to measure from the grid lines back to face of the buildings to see whether the tower structures lean in or out
-	Degree of accuracy +/- 6mm

Murphy Surveys Solution:

-	Control & Topographic survey of the Guy’s Tower and adjacent areas with permanent control stations around the site and on the facades of the towers. The deliverables were related to OS Grid and Datum by high accuracy GPS and total station survey methods and presented through a 2D topographical plan, witness diagrams and a survey report on the control network.
-	Elevation survey of the facades using 3D laser scan technology.
-	Internal survey of most of the floor and roof levels presented thought 2D internal floor plans.
-	Survey of cross-sections and interface sections of the points where the adjacent buildings intersect with the tower levels to show structural features and M&E equipment at the section location were presented through 2D cross-section drawings.
-	3D wireframe of the external facades and internal structural features.
-	Matrix grid intersection at 1m spacing density across the whole elevation to be set up and survey data to provide positive or negative value from the vertical/horizontal plane to the façade.
-	Thanks to the multi-discipline approach undertaken, we were able to provide the client with additional information without having to return to site, as all the data were captured at once using laser scanning.

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