1.
CHAPTER 8: HOLLOW BLOCK SLABS

2.
CONTENTS
Hollow and ribbed slabs
Introduction to hollow block slabs
Design of one way HB slabs
Design of two way HB slabs
Design of beams carrying HB slabs
Chapter 8 Problems

3.
HOLLOW AND RIBBED SLABS
Hollow core
Ribbed slab
Hollow block
Waffle slab

4.
INTRODUCTION TO HOLLOW BLOCK SLABS
Components:
1- Solid slab
2- Ribs
3- Blocks
4- Solid part

5.
INTRODUCTION TO HOLLOW BLOCK SLABS
Types:
1- One way
2- Two way
3- Cantilever

6.
DESIGN OF ONE WAY HB SLABS
Choosing of thickness

7.
Calculation of loads
DESIGN OF ONE WAY HB SLABS

8.
Taking a 1m strip
DESIGN OF ONE WAY HB SLABS

9.
Design against moment
DESIGN OF ONE WAY HB SLABS

10.
Solid part
DESIGN OF ONE WAY HB SLABS

11.
Details of RFT
DESIGN OF ONE WAY HB SLABS

12.
Condition
DESIGN OF TWO WAY HB SLABS

13.
Choosing of thickness
DESIGN OF TWO WAY HB SLABS

14.
Calculation of loads
DESIGN OF TWO WAY HB SLABS

15.
Rectangularity
DESIGN OF TWO WAY HB SLABS

16.
Taking 1m strips at the two directions
DESIGN OF TWO WAY HB SLABS

17.
Design against moment
DESIGN OF TWO WAY HB SLABS

18.
Solid part
DESIGN OF TWO WAY HB SLABS

19.
Details of RFT
DESIGN OF TWO WAY HB SLABS

20.
Load calculation
DESIGN OF BEAMS CARRYING HB SLABS

21.
Projected beam
DESIGN OF BEAMS CARRYING HB SLABS

22.
Embedded (Hidden) beam
DESIGN OF BEAMS CARRYING HB SLABS

23.
CHAPTER 8 PROBLEMS
(1) Design the one way
hollow blocks slabs
shown in figure.
Use Fcu=25 N/mm2,
Fy=360 N/mm2,
F.C.=1.5 KN/m2,
L.L.=2 KN/m2.

24.
CHAPTER 8 PROBLEMS
(2) Design the shown
slabs S1 & S2 and
draw details of RFT.
Use Fcu=25 N/mm2,
Fy=360 N/mm2,
F.C.=1.5 KN/m2,
L.L.=2 KN/m2.

25.
REFERENCES
Design of R.C. Structures, Eng. Ahmed Gamal Abdel Gawad.
Lectures in Reinforced Concrete, Eng. Yasser Elleathy.
Design of Reinforced concrete, Dr. Magdy A. Tayel.
Design of Reinforced Concrete Structure II, D. Mashhour A. Ghoneim.
Reinforced Concrete, Dr. Nasr Younis.

26.
‫الدعاء‬ ‫أسألكم‬