Effect of wind load on rural roofing system by experimental test
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Date
2013-06-01
Authors
Amirul Hafees Zahir
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Abstract
Roof failure due to uplifting during rainstorm is a common phenomenon for roof structures. Throughout these years, there are some cases that related to the failure of the roof structure due to the wind blow. Conventionally, in Malaysia most of the roof design is not considered wind load acting as a pressure load to the roof structures especially for low rise building and residential houses. Hence, it is important to consider a suitable material and connection techniques for roof structure to give more stability and avoid the structural failure. Two types of the connection are to be analyzed; the connection between purlin and rafter and connection between purlin and roof sheeting. The data of wind speed are taken at five different places of the study area. For a more conservative result, the maximum value of wind speed is taken as a reference to calculate the uplift force and the value of wind speed is 53.7 km/h. Due to different aspects of this type of connection, the wind uplifting force will be determined. The calculated resulting forces transferred at different connection points were compared with the experimental results obtained from laboratory testing. This result is valid when the proper used of selected material and all the structures are properly design. The highest value of failure force recorded at spacing 850 mm. Therefore, the best design for the connection between purlin and roof sheeting is at spacing 850mm because of the failure force value is higher than the others and the suitable type of roof sheathing for the rural roofing is zinc.