Then both D1.1 and AISC have specific qualifications for the slot dimensions for welding. Now, as Al stated, when being used for a slot for welding, you may change those features. I have many punches for different size slots and all are radiused per the width of the slot/diameter of the hole. And all my punches are designed that way. Any hole/slot I have ever seen called out for bolting was just that, a 'hole' extended by distance. Thus, at the ends, the radius would be 1/2 of the diameter or. At least when used for a bolted connection (measurements just for example, may not be actual slotted hole dimensions). A 15/16" X 1 1/2" slot is just 2> 15/16" holes with an extension in between. Strat, I will look and see if I can find something 'in print', BUT, it is just an extended hole.
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