The two tower blocks were constructed during the 1960’s using reinforced concrete frames, precast concrete & external wall panelling, each structure was 24 stories tall & housed 132 residents.

This project required the removal of all asbestos contained materials, the soft strip of all timbers & other non-masonry materials, deconstruction using mini-demolition rigs to a reduced level, demolition using high reach machinery, followed by the processing & safe removal of all remaining resultant materials & the back filling of the foundations.

 

Client: Glasgow Housing Association

Contract: Tower block demolition, asbestos removal & site clearance

Start/end date: 2016 – 2018

Total Project Value: £3,500,00.00

Planning & Feasibility Studies

Following numerous site feasibility studies by the management team of TDS, a combination of deconstruction to a reduced level by ’top down’ demolition was undertaken, down to the eleventh floor.  Followed by high reach machine demolition for the remaining structure, this preferred method was chosen based on the information contained in the pre‐construction information pack, the existing structural design of the buildings & most importantly the close proximity of existing occupied residentials.

Complexity of Demolition

The two blocks were fairly typical of the 1960’s period, with reinforced concrete frames & floor construction, precast concrete & external wall panelling.

The ground floor comprised the entrance area & various services rooms, above that were 22 floor levels containing 6 domestic flats on each floor, served by a central corridor, two lift shafts, a concrete main staircase & an emergency escape steel staircase.

At roof level there was a lift motor & plant room, which originally had a concrete flat roof, this was overlaid with a steel frame & clad pitched roof with external metal cladding added to the external elevations of the plant room.

To enable the safe demolition of the tower blocks, consideration had to be taken in regards to the low-rise blocks that were in very close proximity to residents, safety precautions were put in place, with Site Supervisors doing regular checks around the site for any potential dangers while the deconstruction of the blocks to the eleventh floor level were safely carried out.

Protection was provided by the pioneering use of a mast climber working platform system as devised by TDS engineers.

Deconstruction of the roof level & floor level below, was carried out using mini demolition rigs & jacks, with the redundant lift shafts being used as a means of transferring demolition hardcore from the working level to ground level extraction point.

Once the structure was reduced to the aforementioned eleventh floor level, the residual structure was demolished using high reach demolition rigs, safely & without any damage or risk to the residents or neighbouring low-rise housing blocks.       

Liaison

A mutual team spirit between TDS & the client aided this delicate demolition, with all parties working towards achieving the objectives & goals in place, of having zero accidents & zero incidents.

Residents Liaison Officer (RLO) was quickly able to establish a healthy working relationship with the surrounding residents, thus mitigating any potential adverse with residents who had concerns, we kept residents updated with the project progression, with regular newsletters.  The RLO would not only advise & update residents, she would communicate personally with them with regards to any queries or concerns they may have had.