Chapter 8 covers the design and implementation of hollow block slabs, including one way and two way designs, as well as beams carrying these slabs. It details components, types, calculations of loads, and design specifics for both slab types. The chapter concludes with problems for practical application, along with references for further study.

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