Study on Aerostatic Force acting on rooftiles

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This paper describes wind tunnel tests of the aerostatic force acting on rooftiles. Pressure distribution acting on full-sized model of rooftiles was measured. The rooftileswere set up on the gable roof of 5.1m wide ×3.2m deep ×2.0m tall in the wind tunnel. The pressure acting on the underside of the tiles, which was found to be both positive and negative due to the wind direction and the location of the rooftile, was effected by 1) gap between rooftile and sheathing board at the eaves, and 2) gap between the neighboring rooftiles.<BR>The authors assumed some model of pressure spreading underside the rooftiles, and caliculated the wind speed at which the dynamic equilibrium of roof tiles was losed.<BR>Compared with the wind speed at which the rooftiles scatter4], the wind speed was found to be lower about 30 %, but the pattern was similar to scattering.
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