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Bolts made of steel used to comply with the requirements of,, and having a greater strength than specified by ASTM A307 shall be permitted, provided that the maximum allowable stresses increased proportionally based on the ratio of the ultimate strengths. Elongation shall conform to the requirements of the corresponding ASTM specification.

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2.15.6 Electric Elevators, Materials for Car Frames and Platform Frames
E8 and the stresses and deflections conform to 2.15.10 and 2.15.11, respectively. Rivets, bolts, and rods made of steel having greater strength than ...