Is code recommends Minimum hook length 75 mm. Since There are two hooks and length of one hooks is 9d. Length of one bends at 135 0 is 3d.
R Total radius of stirrup clear cover half of bar dia.
RECOMMENDED END HOOK DIMENSIONS. Formula of Cutting Length for Diamond Stirrup 4 x H hooks 24 d 3 numbers of 90. R 500 40 5. R Total radius of stirrup clear cover half of bar dia.