THE EFFECT OF WIND LOAD ON RURAL ROOFING SYSTEM

There is reported roof failure due to uplift of the roof structures or roof sheeting during rainstorm has been causing damage to the buildings. Generally, failure occurred at the two points which is the truss connection and at the roof sheeting. There are 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. The result of this, is that connection is safe under the wind speed of 53.7 km/h. These results are 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 and the percentage different for zinc and metal deck is 31.81 %. Therefore, the best design for the connection between purlin and roof sheeting is at spacing 850mm because of the value of failure force is higher than the others. The suitable type of roof sheathing for the rural roofing is zinc.