Situated in a very busy area of Westminster for both vehicular and pedestrian traffic, careful consideration was given to the establishment of the site and the traffic routes for deliveries and removal of site waste. Prior to the demolition scaffolding covered with Monarflex scaffold sheeting was erected around the entire building to protect the residents and pedestrians as well as minimising noise and dust. A 2.40m high hoarding was erected below the scaffolding supported on concrete “Lane Guard Blocks” similar to those used on motorways to protect the site from being inadvertently struck by a vehicle.
The scaffolding and hoarding was designed by Swanton Consulting. The T-shaped reinforced concrete building, nine stories high with two further two storey podiums at lower levels, was demolished from the top down using mini machines and Bobcats. The demolition arisings were deposited down the existing lift shaft that was prepared in advance for use as a well hole. On completion of the demolition, a temporary propping scheme in the form of steel rakers cast in concrete thrust blocks, also designed by Swanton Consulting, was erected to support the basement walls in tandem with the removal of the basement slab. Noise, dust and vibration were monitored by Erith’s environmental team throughout the project to ensure that best practical means were used to control them. This was carried out in accordance with Section 60/61 of the Control of Pollution Act signed up to in conjunction with Westminster City Council.