RMD Kwikform supplies kit for USAF project in Guam
Mobile Megashor towers supplied by RMD Kwikform have been used to construct a hangar in at a United State Air Force (USAF) base in Guam.
RMD Kwikform has supplied 208t of equipment, including five mobile 19.82m-high Megashor towers, to support the construction of a high-bay maintenance hangar at Andersen Air Force Base.
The team designed a solution for the 100m-long, 35m-wide and 20m-high hangar using heavy-duty Megashor towers that could be attached to wheels and moved from one spot to the next.
Involvement in the project began at pre-tender stage, when RMD Kwikform began designing a solution that adhered to the tight programme time and stringent health and safety regulations stipulated by the client. The equipment supplied included Megashor heavy duty shoring, Superslim solders, Alform beams, Kwikstage stair access and castor wheels; there were a total of nine 40-foot containers delivered to site.
RMD Kwikform operations manager Arlan Vergara said: “With our equipment on just six months rental, the programme was incredibly tight, with health and safety as a crucial factor. In total, there were seven structures, which included the Megashor towers and two 2.6m-high towers next to the abutments. We had to design a solution that was swift and efficient, and minimised the number of site operatives working at height.
“With winds reaching up to 190 miles per hour, we decided to utilise mobile Megashor towers using heavy duty castor wheels; this eliminated the need to dismantle and fabricate each structure after every pour. The structures were then moved whilst the arches were struck, which ultimately saved considerable time and money.”
Each of the castor wheels were attached to the Megashor end plates, which were 2,700mm in length and fixed adjacent to the main tower legs. Once the Megashor jacks on the main towers were lowered, the full weight was transferred to the castor wheels. Each of the structures were moved 36 feet to the next position, in less than one hour. In total, the towers were moved three times, allowing the site team to complete the arched roof of the hangar.
Vergara added: “The arch roof was made of precast girders, each weighing up to 81.2 tonnes; the girders were supported by the Megashor towers during erection. Once the concrete had been poured against the diaphragm walls that connected the girders together, the concrete was then cured and the Megashor towers moved on to the next position on the castor wheels.”
FA Engineering, a Hong Kong-based contractor, supplied special brackets and structural headers beams, these were used to provide direct support for the 81.2 tonnes of precast arched roof girders, which were assembled alongside the other structures on site.
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This article was published on 14 Mar 2017 (last updated on 14 Mar 2017).