Stockpile Building Rehabilitation Methodology – Moving Access Platform
The Stockpile Building located at the Port Site Facility in Karumba, in far north Queensland, is a 250m long, metal clad building storing zinc and lead ores during their final drying stage prior to shipping to overseas refineries. The ores are sulphides that, due to the high humidity within the building, create ‘Acid Rain’ which causes significant corrosion. Due to this corrosive environment, the cladding system of the building and steel structural framing members required rehabilitation. This included the inspection, cleaning, painting and replacement as required of purlins girts and the main structural portal frames and longitudinal bracing members. Robert Bird Group developed a rehabilitation methodology that used moving internal platforms to provide access to the roof area where the rehabilitation works were to be carried out. The project was restricted as the maintenance works were to be performed 10 to 30m above the stockpile. The building was to remain fully operational – no access scaffold from the ground could be used.
Energy & resources
Minerals and Metals Group
Robert Bird Group Services:
Key technical challenges
- The primary tower structure consists of a composite slab and beam structure. Due to the long beam spans and thin slab, extensive analysis for footfall vibration was required to ensure the structure achieved code requirements and client expectations.
- Working with the existing structure and developing design solutions that strengthened rather than demolished.
- Extensive co-ordination with the mechanical engineer to develop a strategy that minimised beam penetrations and beam notches.
- Differential shortening analysis with consideration of mega truss, steel structure, concrete structure and existing structural elements
- 5 Star Greenstar
- 5 Star NABERs Energy and 4 Star NABERs Water ratings.