Iam designing a concrete slab supported on two beams,the deflection results obtained in staad pro (post procssing) are given in length unit,how do i compare these results with allowable deflection because the alowable deflection according to BS 8110 (Table value 3.9 X Modification factor) which do not have units.
I am wondering how are you performing a deflection check of the slab in STAAD.Pro? In the Advanced Concrete Design workflow? Or just checking the maximum nodal displacement of the meshed plate? Which Table in BS8110 are you referring to?
My slab is only supported by two beams, this kind of slab can not be designed in RCDC, in such case i have mesh my slab plate, and design it in Staad pro C.E work flow.
The displacement which i consider is maximum nodal displacement, and remember in workflow of Staad Pro C.E plate defflection check is not performed, we have to check it manually. That is where iam asking how do we compare the results of displacement of nodes with the allowable deflection.I have attached the Code below
Question number 2
Hi Joseph, with regard to question 1, as long as you satisfy the span/effective depth ratio requirement then deflection is satisfactory.
Yes but when the load is critical sometimes the deflection will occur even if span/effective depth ratio is ok,what is the way forward?