So maximum diameter of reinforcement bar used in 5 inch (125mm) thick RCC slab is 16mm (5 soot). In general we use 5 inch (125mm) thick slab, if thickness of slab is 125mm,then maximum diameter of bar used in slab is 125/8 which is equal to 16mm. As per IS 456:2000, in rcc slab, maximum diameter of main bar and distribution bar should not exceed 1/8th thickness of slab. What is the maximum diameter of reinforcement/ bar used in slab as per IS 456: 2000:- there are two types of reinforcement/ bar provided in RCC slab, 1) main bar provided in tension zone of RCC slab and 2) distribution bar provided in compression zone.
As per IS 456:2000, in rcc slab, minimum diameter of main bar should not be less than 8mm (highly yield strength deform bar HYSD) or 10mm (plain bar) and distribution bar should not less than 8mm. What is the minimum diameter of reinforcement/ bar used in slab as per IS 456: 2000:- there are two types of reinforcement/ bar provided in RCC slab, 1) main bar provided in tension zone of RCC slab and 2) distribution bar provided in compression zone.
But there is some Thumb Rule and basic law of rule and guideline IS code 456:2000 suggesting what are the minimum and maximum diameter of bar used in RCC slab. What are the minimum and maximum diameter of bar used in slabĪctual minimum and maximum quantity of reinforcement bar and their diameter and number used in rcc slab according to design, whether it will be flat slab, one way slab and two way slab, span and length of slab, live load etc.
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