Stirrup hook question
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As shown in the picture, it is a sample of steel bars for the diaphragm of a high-speed railway box girder. The stirrup hook in the picture is 6.8cm and the diameter of the steel bar is 16mm. How is the hook length calculated? If the hook length is equal to the diameter of the steel bar, then the hook length is equal to 4.25 times the diameter. Why is it 4.25 times? Isn’t it usually 10d? Thank you!
For detailed structure, see pages 59 and 62 of 16G101-1
Thank you. Does the turning radius at the hook not pointed by the pink arrow in the picture follow the 90° hook radius rule? thank you!
So what standards should be followed? thank you!
Oh, I saw it wrong. I thought it was the standard 135-degree hook in your picture.
Thank you. Does the turning radius at the hook not pointed by the pink arrow in the picture follow the 90° hook radius rule?