RA2000 SYSTEM – FOUR EDGE SUPPORT - 3 Degree Slope Incorporating Skytherm Top Hung Opening Vent Comprising 6mm clear float toughened glass outer 16mm Cavity and Low E laminated inner
With reference to the above we confirm that we carried out a roofing assembly test at D & D Glazing’s premises on the 5th March 2008.
Prior to the commencement of the testing we were provided with documentation prepared by the Advisory Committee for Roofwork – ACR [M] 001:2005.
Mr David McDowall of the above address supervised the entire test as the competent person and he has provided a dated signature below.
The principle of the test was to determine the fragility of a roofing assembly by releasing a specified weight in a controlled fall under gravity towards the assembly. The results of the test classify the assembly in accordance with the degree of resistance to withstand the impact from the weight.
The assembly tested was the RA2000 System. The test piece spanned a distance of 964mm, supported on a steelwork testing frame. The testing frame was pitched to an angle of three degrees to represent a roof slope (This configuration is required at Alva Academy).
The RA2000 System tested was a four edge support system consisting of two glazing bars (4124 sections) spaced at 939mm. Box transoms existed to the head and base of the 4124 section spaced at 854mm. Top hung ventilator infill was located within the four edge support system.
The assembly was subject to multiple drop-tests using the following apparatus. A cylindrical sand bag (45kg in mass) was released (using a quick release mechanism) from a minimum height of 1200mm. The height was measured from the underside of the bag to the highest surface of the assembly under test.
Three drop tests were carried out in accordance with the test method described in ACR [M] 001:2005.
Following the third drop test, the glazed infill and supporting assembly showed no evidence of significant damage that would affect the long term strength and weatherability of the assembly. The RA2000 System with the Skytherm Top
Hung Ventilator may therefore by classified as a Class A Non-fragile Assembly in accordance with ACR [M] 001:2005.
This concludes our report.
David McDowall
Mr David McDowall – Proprietor D & D GLAZING (Glasgow) Ltd
