Lecture 15

212 Ketter Hall, North Campus, Buffalo, NY 14260-4300 Fax: (716) 645-3733 http://www.civil.buffalo.edu

Tel: (716) 645 2114, X 2400

CIE429 – RC Design CIE429 Design http://civil.eng.buffalo.edu/cie429/ Lecture #15

Ribbed (Joists) Slab

Instructor:

Andrei M. Reinhorn P.E. Ph.D.

Professor of Structural Engineering Prof. Andrei M Reinhorn

De s i g n o f F l a t Sl a b s

Prof. Andrei M Reinhorn

S l a b s - Ri b b e d Sl a b s On e w a y j o i st s


De t a i l s o f Co C o n sstt r u c t i o n


De t a i l s o f Co n s t r u c t i o n (2 )


Eq u i v a l e n t Sp a n L e q


Ex a m p l e o f J o i s t s De s i g n

The design has two steps: 1. Design of the top flat plate supported by the ribs (joists) 2. Design of the joists as T beams (integrally connected with top flat slab Prof. Andrei M Reinhorn

U p p e r F l a t Pl a t e D e s i g n


De s i g n o f J o i s t s


De s i g n f o r F l e x u r e


V e r i f i c a t i o n o f Sh e a r


De s i g n f o r F l e x u r e


Cross Section 3 12 30

1/2

5

1/2

30

1/2

5

1/2

15

30 Prof. Andrei M Reinhorn

A r e a o f R e i n f or o rc i n g B a r s


Lecture 15

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