Why do we take 0.42D as crank length of a bent up bar? | Derivation of 0.42D | Civil Tutor #BBS

Cranked bars are provided in RCC members to resist negative bending moments. These bars are provided in slabs as well as in beams since these members are subjected to tensile stresses. The Inclined length is known as crank length and is taken as 0.42D. where, D is the c/c distance between the top and bottom main bars. In this video I have explained, Why do we take 0.42D as crank length of a bent up bar and how we can do the Derivation of 0.42D? Join our online courses here https://fnrjb.courses.store/?filterId=33&sortId=7 Advanced Quantity Surveying + Bar Bending Schedule (Hindi / English) https://fnrjb.courses.store/264604 Complete Building Design combo course (Hindi + English) https://fnrjb.courses.store/130675 Site Engineer Course in English https://fnrjb.courses.store/137112 Site Engineer Course in Hindi https://fnrjb.courses.store/215740 Quantity Surveying Course in Hindi