Why are we using crank bars in slab and beam What is the main rod and distribution rod in a slab

In this video we discuss about why we are using crank bars in slab and beam, why because we in support there is hogging in the middle of the slab we have sagging, simply in the end of the support we have negative bending moment and middle of the beam we have positive bending moment, to resist that we have to reinforce by using steel bars or steel rod, By separated providing a rod means we need to spend more money for the steel. So, we bend a bar into a 45 degree angle, then we get a top rod and as well as bottom rod so we can handle hogging and sagging in a single bar. This video also deals with the purpose of one way slab and two way slab, Why rectangle slabs are one way slab and why square shape slabs are two way slab. For construction, planning, Estimation, 2D and 3D design and structural design Contact below. Saran mayilnathan: 8667653803 Rathish : 8667253687 Note: construction only in Chennai and Kanchipuram. Advance civil engineering products:- Marking:- Laser machine: https://amzn.to/3Th25b6 Advance spirit level: https://amzn.to/3Fq1kGT Dumpy level: https://amzn.to/3LjLrpo Leveling staff: https://amzn.to/3JDlzDE Total station : https://amzn.to/3YOMArW Auto adjustable prism: https://amzn.to/3lfQTio Right angle marker: https://amzn.to/3TepfyU Digital measuring tape: https://amzn.to/3lfqX6t My youtube setup:- My mobile: https://amzn.to/3TfwyGu My mic : https://amzn.to/3YTbeYy My tripod : https://amzn.to/3JaTW3a Light:https://amzn.to/3LoD5wA My PC setup Processor: https://amzn.to/3l8Obvb Gpu: https://amzn.to/3Ji3FoC Motherboard: https://amzn.to/3lfoLvL Ram: https://amzn.to/3mMEDpT Power: https://amzn.to/3YQeoMy SSD: https://amzn.to/3ZN6aGv Monitor: https://amzn.to/3JIkMBv keyboard : https://amzn.to/3JHEmOj Code book: https://amzn.to/3ZLPO0X But my suggestion camera : https://amzn.to/42p2Kvo Mic: https://amzn.to/3TgAYgg Tripod: https://amzn.to/3LpiqbH Light: https://amzn.to/42emdi7 Matte : https://amzn.to/3TjlesV Matte: https://amzn.to/3JjEXEh Pc: https://amzn.to/3lir8hy Join this channel to get access to perks:    / @civilonlycivil   Facebook: https://www.facebook.com/CivilOnlyCiv... Web:https://civilonlycivil.blogspot.com Instagram: https://www.instagram.com/civilonlyci... Twitter:   / civilonlycivil   Telegram: https://t.me/civilonlycivil (Use VPN) Linked In:   / civil-only-civil-coc-07aa51200   For JOBS:Telegram link: https://t.me/joinchat/C6rlxI3m_d8wYjJl (Use VPN)