Question regarding opening reinforcement
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The designed container head features two openings arranged vertically along the centerline: 1 is at 273, and 2 is at 235. The arc length along the centerline is 506, while the straight-line distance is 500. According to the standards, combined reinforcement should be applied, but when entering the values into SW6, it indicates that the distance is too great and thus no combined reinforcement is necessary. Experts, please provide an explanation
You need to note that the hole spacing refers to the distance on the surface, while the hole diameter refers to the inner diameter of the pipe plus twice the thickness allowance. If it is a oblong or elliptical hole, it should be the chord length plus a thickness allowance.
Since the types of openings differ, the distance calculations also vary; it is possible to carry out further calculations by referring to the standards.
Once you understand what the hole diameter means, there will be no problem