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四、硬木键计算 20φ纵梁所容许的硬木键最大槽深* 6=1/4×0.9426×20=4.7公分查“木桥设计原理与计算实例”附录5,20φ圆木(未经砍削的)当槽深4.5公分时, 槽口的宽度 S=16.7公分, 面积ω=52.9平方公分, 对于砍削d/3宽的20φ圆木,槽口实际面积为: 52.9-2.56=50.34平方公分(2.56为砍削d/3宽的面积)
Fourth, the calculation of hardwood keys 20φ stringers allow maximum hardwood key groove depth * 6 = 1/4 × 0.9426 × 20 = 4.7 cm Check the “design principles and calculation examples of wooden bridge” Appendix 5, 20φ logs (uncut ) When the groove depth of 4.5 cm, the notch width S = 16.7 cm, area ω = 52.9 cm 2, for cutting d 3/3 wide 20φ log, the actual area of the notch: 52.9-2.56 = 50.34 cm 2 (2.56 for the cut d / 3 wide area)