147 Category 4: Special Projects 4 Scaffold for the construction of the Dong Hejre Jacket - Vlissingen, The Netherlands SE Owner Dong Energy General Contractor Heerema Fabrication Group Engineering Office Altrad Balliauw Construction Period 06/2013 - 03/2014 The Hejre jacket construction was assembled on the Heerema yard and was 93 m long, 60 m wide and 45 m high. In order that work could be carried out safely at a height and to give protection against wind and rain, scaffolds had to be erected. Due to the complexity of the scaffolds (height, cladding and several clashes with the jacket), the project lead time and the fabrication sequence, it was necessary to design each complex scaffold in advance. The jacket construction (dwg file) was imported into SCIA Engineer, enabling us to design the scaffolds in detail. Furthermore, after joining the first pair of rows, this box structure, including 10 scaffolds, had to be moved. Consequently, we had to design and carry out a 2nd order calculation for 38 complex scaffolds with SCIA Engineer using the scaffolding module. Because we designed the scaffolds in advance and due to the complexity of the structure, the builders had to erect the scaffolding using a detailed plan. These were made in SCIA Engineer “paperspace”, with the positions set by a surveyor. After our detailed design and calculation, we proposed some adjustments to the fabrication sequence and added some temporary steel for the stability of the scaffolds, due to the high wind loads on the cladding. Thanks to this working method the scaffolds were erected as quickly, economically and safely as possible. Altrad Balliauw Contact Astrid Schaut Address Aven Ackers 10 9130 Verrebroek, Belgium Website www.altradballiauw.com Altrad Balliauw, established in 1976, is a respected name in industry and in the construction sector in Benelux and is part of the large French Altrad Group. Altrad Balliauw is active in scaffolding, industrial insulation and asbestos removal. Its industrial activities are mainly focused on the energy sector, (petro) chemicals, metallurgy, construction, food and pharmaceuticals. The Altrad Balliauw engineering department designs and performs the calculations for each complex scaffold in advance, for maximum safety, stability and efficiency.
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