All services were identified in the site plans and terminated by the client. A CAT scan of the site was carried out by the Lawson Group demolition supervisor who had received the relevant cable detection training. Loose contents from within the structure, including furniture, appliances, loose waste etc. were removed by hand in a controlled manner. Door frames and skirting boards were removed by using bars and sledgehammers; all nails and fixings were removed from the walls. There was a sales centre located along Ashley Road and this was to remain in use for the duration of the works.
Buildings 1, 2 & 3 Demolition
A 360° demolition excavator with grab attachment was positioned at the rear of each structure, all voids in the ground such as manholes and sewers were protected. Asbestos roof sheets from building one and three were carefully removed by hand whilst utilising MEWPS prior to demolition. Using a hydraulic grab and sheer attachment, starting at the apex of the roof, the frame of the roof was then removed back to the first internal wall. The waste from the roof was removed by a second excavator. As each bay was removed, the side walls were lifted down using the grab attachment, any internal floors were removed as each bay was removed.
As the works progressed towards the back of each building, a banksman was positioned along the site boundary. The back walls of each building were removed using re-handling grabs. These grabs were positioned over the top of each wall where they lifted down each section of wall to ground level. All hardcore was left within the building’s footprint to enable the excavator to gain height and all general waste and wood was segregated using hydraulic grabs. This was stockpiled and loaded into the bins.
Building 4 Demolition
This was the last building to be removed so protection scaffold could be installed around the three elevations as shown to the right. No evidence of birds living in the roof was found. The excavator was positioned at the back of the building. Using a hydraulic grab and sheer attachment, and starting at the apex of the roof, the frame of the roof was removed back to the first internal wall. The waste from the roof was removed by a second excavator. As each bay was removed, the side walls and windows were lifted down using the grab attachment. Like the first three buildings, the internal floors of this building were removed and stepped back as the works progressed. The appointed scaffolders were onsite during the removal of the building so as each bay was removed, the protection scaffold could have its sheeting removed back to each column. As the mechanical deconstruction of each building progressed, the dust boss was moved along ensuring all areas were covered and no dust was being generated. Once all the waste had been processed and removed from each building, the slab was cleaned off using a grading bucket. All slab and foundations were removed, processed and removed from site. Once the slab and foundations had been removed, the reduce dig to a depth of 500mm commenced. Starting at the back of the site, the soil was dug out and loaded into eight-wheel lorries for removal from site. All edges of the excavation were battered back to 45° around the boundary of the site and levels were checked by the appointed engineer once the soil had been removed.
The site boundary hoarding was removed in sections, crushed concrete was then imported and placed around the site boundary to a depth of 500mm and approximately 1000mm wide. Site hoarding was then moved back on top of the crushed material.