| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a high-tension steel grating which maintains the safety and standard strength of a product while utilizing a merit of high-tension steel, is high in production efficiency, is effectively reducible in weight, can be applied to even an assembling grating, is further excellent in price competition performance, and can maximally secure safety at manufacturing.SOLUTION: A grating 5 comprises a main member 1 which is aligned in parallel in an erected state, and bears a load, and one of at least a connecting member 2 and an end part member 3 which are connected to the main member. A raw material of at least the main member 1 is formed of high-tension steel whose allowable stress is not lower than 300 N/mm2, and not higher than 380 N/mm2, and tensile strength is not higher than 850 N/mm2. The grating satisfies two conditions that a yield point of the raw material which satisfies the imparted allowable stress in the range is not smaller than 1.3 times of the allowable stress, and that the tensile strength is not lower than 1.8 times of the allowable stress. |
