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 https://fnrjb.courses.store/52692 Professional Drawing reading course https://fnrjb.courses.store/137097 Staad.Pro + RCDC Building Design & Detailing Course (English + Hindi) https://fnrjb.courses.store/197012 Download our app here 👇🏽 https://clpsheldon.page.link/x3kb Compiled PDFs👇 http://store.civiltutorofficial.com Must-have books for civil engineers 👇🏽 The A to Z of Practical Building Construction and Its Management https://amzn.to/3HKmjm9 Building Planning and Drawing https://amzn.to/3sPztdA Illustrated Design of Reinforced Concrete Buildings ( Design of G+3 Storeyed Buildings + Earthquake Analysis & Design) https://amzn.to/3tD9aGq Advanced Reinforced Concrete Design https://amzn.to/3IRZwGn Limit State Design of Steel Structures https://amzn.to/3pIk1O6 Estimating and Costing in Civil Engineering (Theory and Practice) https://amzn.to/3IWcwLq The mic I use👇🏽 https://amzn.to/35ejhcN #BBS crankbar #civiltutor