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Reference projects - Roof erection


Large steel roof structures are often a major cost & site programme component with a project and present a unique erection challenge. One commonly adopted erection solution is to pre-assemble the roof at ground level or even off site completely, and then use modern heavy erection techniques to place the roof assemblies into final position. This reduces site programme, erection cost and increases safety by reducing the site manhours spent working at height. Roof cladding and installation of mechanical and electrical equipment can all take place at ground level. DLT are able to fully engineer and carry out these types of operation.

Recent examples of our work include……….

Ventian Theatre Roof Erection, Macau
DLT are sub-contractors for the erection of the 940 tonne steel roof structure for the new 2000 seat theatre as part of ‘The Venetian’ Development in Macau. Our scope includes erection engineering, equipment rental and site operation. The roof trusses are assembled on site at ground level and then lifted into position using a climbing jack system. The roof trusses will be erected in 3 separate lifts, each weighing up to 400 tonne. More>
Heathrow Airport, New Terminal 5, UK
DLT were responsible for the detailed erection engineering for the 18,500 tonne steel roof structure of the new main core terminal building, and for a 1000 tonne air traffic control tower. Both were fabricated off-site and erected on-site using strand jack lifting systems. The roof box girders, purlins and cladding to the core terminal building roof was erected in 6 No 2,000 tonne lifts. The control tower was pre-assembled off-site into 7 fully complete modules and then assembled on-site using a unique vertical jacking technique. More>
New Wembley National Stadium, UK
DLT were responsible for the detailed erection engineering for the 26,000 tonnes of structural steel, including stands, cable suspended roof and main arch structures. The 1,490 tonne main arch was assembled flat and rolled up into position using strand jacks. We were responsible for engineering and supervising this operation. More>
Virgin Atlantic Airways hanger roof lift, London
DLT were responsible for the detailed erection engineering for the lifting by strand jacks of an 800 tonne roof truss for this aircraft maintenance hanger at Heathrow Airport. The roof structure was assembled at ground level and then lifted using strand jacks mounted on the top of the permanent columns, which were stabilised by rented proprietary towers that were anchored down to the permanent foundations.
HAECO hanger roof lift, Hong Kong
The 2000 tonne steel hanger roof of this maintenance hanger was assembled at ground level in two 1000 tonne units and jacked to full height to save time and money. DLT were responsible for all aspects of the erection engineering for supply and operation of the strand jack system to lift the roof sections. Each roof module was lifted using 9 No DL-S185 strand jacks. More>

Hong Kong Convention & Exhibition Centre.
The 5,500 tonne steel roof of the HKCEC was fabricated in the Philippines and transported to site in pre-assembled roof modules of up to 460 tonnes. On arrival at site the roof modules were lifted to full height and skidded horizontally into final position. This erection method moved the maximum amount of work into a low cost region and minimised erection time on site. DLT were responsible for detailed erection engineering and for supply and operation of the heavy lifting and skidding equipment. More>

Enlarge image Cairns Convention Centre Phase II, Australia.
The roof to this convention centre is constructed from a complex series of curved V shaped steel trusses that work with a plan tie system in the finished state to provide a rigid and stable structure. To reduce the roof erection cost and programme, the roof was assembled in fully clad panels adjacent to the site and erected onto temporary supports within the building. We were responsible for the detailed erection engineering of the roof, including all temporary supports and stability bracing, which was required to withstand cyclone wind loads at any erection stage.