ﻣﺎ ھى اﻗﺻﻲ ﻣﺳﺎﻓﺔ ﺑﻳن اﻻﺳﻳﺎخ و ﺑﻌﺿﮫﺎ ﻓﻲ اﻟﺑﻼطﺎت؟?

the maximum spacing between bars is 20 cm 

one way slabs : 1.5 * thickness of slabs . maximum 20 cm

Two ways slabs : 2 * thickness of slabs . maximum 20 cm Thank you  

in civil engineering field QS means preparation of record of cost and contracts through out the whole span of project.  

maximum dist. between rft. bard 250mm

  We typically leave 18" between the countertop and the bottom of the uppers,20 Cm between

thankscm between   one and  two

25 cm depending on specifications of the US Code

thanks for invition ...............20cm 

25 cm ,,,,

Thanks for the invitation ...