A key component that is critical to the success of the design is the I beam trolley. There are several quality products avilable for a wide variety of prices and with different selling points. The trolleys that would suit our design are shown below:
[£67] 1000 kg Hand Pushed Trolley - Quick Fit
[£90] 2000 kg Hand Pushed Trolley - Quick Fit
[£112] 2000kg Push Type Beam Trolley / Girder Trolley
The quick assembly and/or fitting of any trolley to the structure would be essential in a disaster situation. Combining this with the relatively cheap costs shown above would prove to be a winning formula.
Links:
http://www.mammoth-hire.co.uk/2T-Adjustable-Beam-Trolley-370120/
http://www.sutch.co.uk/English_2008_Page_58.pdf
http://www.angliahandling.co.uk/acatalog/Hand_Pushed_Trolley_-_.html
http://www.liftsafesolutions.co.uk/id72.html
http://www.pacline.com/products/12_overhead_trolleys.php
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