รูปแบบการออกแบบที่เหมาะสมที่สุดสำหรับโครงถักหลังคาเหล็ก

Abstract

This paper presented an optimum pattern of four most popular roof trusses and the lightest weight of the standard truss. The designed structure maintained strength and safety under the limit states of standard steel structural design in accordance with the Engineering Institute of Thailand standards 1015-40 by using the Allowable Stress Design (ASD) method. In this study the height of truss was used as the parameter for making results convergent to the optimum point, and resulting in reduction of the structure's weight. Results from the study showed that the lightest truss pattern was the fan truss, and the weight of the truss at the optimal point was reduced from standard pattern by 29.3%. Therefore the study of optimum pattern for steel roof truss design might offer an alternative outcome for lower the cost of construction.