Abstract
With the advent of high-rise buildings and modern techniques of construction, the prefabrication process by use of precast concrete panels and metal curtain walls of large size has been developed to save the labor cost and curtail the construction period. Such being the case, though the wind loading of the load suspended by the crane has not so far been incorporated into the design process of the crane and the users are in the habit of deciding on the maximum instantaneous wind velocity available for the crane in use at the construction site, the wind loading has become so large due to the strong wind at the high working site and the increase in the surface area of the precast concrete panel exposed to the wind that an accident might occur at any time in a gusty weather. In the natural wind, there are some turbulence and gustiness, which causes the suspended load displace in response to wind fluctuations. This is the reason why the suspended loads in the natural wind are subjected to greater resistance than in a uniform flow of the same mean velocity. Therefore, it is the purpose of this paper not only to make a theoretical as well as experimental research into the phenomena and confirm the validity of the buffeting theory by Prof. A. G. Davenport, but also to discuss the proper manipulation of the crane.
