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176 Lifting large double glazing unit
Report ID: 176
Published: Newsletter No 42 - April 2016
Report Overview
Inadequate instructions were provided by a double glazing pane supplier on how to lift and move their product, supplied on a flatbed truck, off the truck and onto the works.
Report Content
Inadequate instructions were provided by a double glazing pane supplier on how to lift and move their product, supplied on a flatbed truck, off the truck and onto the works. This was a large sheet measuring 3m x 2m with a weight of about 270kg and initial attempts were made to lift it with a 6 suction lifter 500mm x 750mm in size. However the complex operation had to be abandoned due to excessive bow in the top of the sheet. After a half a day during which the truck partially blocked the road a much larger 14 suction assembly was obtained and used to lift the unit from a flat position, turn it through 90 degrees, and then lift it into position. A phone call to the supplier during the aborted lift provided no information and in a later call they were advised to provide adequate guidance on the suction area needed to lift these large panels.
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The designer has the responsibility to consider erection issues from a safety perspective. The construction process always requires items to be delivered to site then lifted into position. In all cases there should be clear instructions on what to lift and how to lift the item. This should include information on weight, centre of gravity, and a check that the item is strong and stable enough under self weight (perhaps with wind) when supported at designated lifting points. The case also illustrates how lack of due consideration leads to additional cost and delay.