2. 1 KING FAHD UNIVERSITY CIVIL ENGINEERING DEPARTMENT A New Prefab Panel As a flooring slab Web Grid Core Panel ABDUL FATTAH DARWISH

3. 2 Subjects  The Problem ?  Panel Description  Structural Study  Economical Study  Comparison  conclusion

4. 3 Problems ?  High Dead Loads in buildings ?  D/L ≥ 2 In ordinary buildings  D/L = 1 In Hollow Core Slab ?  Construction Cost & Time  Slab Cost @70% of Skelton  Slab Time @ 75% of Skelton Time  Earthquake Disasters  Mass & Height  Environmental Impacts of Concrete  Roads & Crushing Plants Problems  Energy Loss  Crushing Plants,Transportation & Construction

5. 4 Panel Description Components  Web Grid Core  Cladding Plats  Filling Material  Connecting Devices

6. 5 Panel Description Strength Points  Very Light : 10% of concrete Weight  Very strong : 50 cm for 20x20 m  Could be one or two way slab action  Reduce @ 50% of Building Weight  Reduce @20% of skeleton cost  Reduce construction time  Reusable,Removable and adjustable  Easy to transport & install

7. 6 Panel Description Improving points  Water Proofing  Fire & Heat Resistance  Electric Conductivity  Sound Resistance  Connecting Devices

8. 7 Data  Dimensions are: 6 x 6 x 0.20 meter  Pinned supports all around  All elements are 1.5 mm thick.  Total load is 300 kg/m2 Results  Max. stress is 0.15 t/cm2  Max Deflection 1.0 mm Structural Study

9. 8 Stress isometric

10. 9 Top Plate Stress 0.15 t/cm2

11. 10 Bottom Plate Stress 0.13 t/cm2

12. 11 Central Rib Stress 0.13 t/cm2 Deflection is 1mm

13. 12 Data:  10 floors building  Floor area 12X12 m  Current prices for ribbed slab Result:  20 % Reduction in skeleton cost if we use the new panel Economical study

14. 13 Comparison against:  Solid Slab  Ribbed Slab  Hollow Core Slab  Siporex

15. 14 Deflection

16. 15 Density (t/m3)

17. 16 Cost (SR/m3)

18. 17 Installing Time (day)

19. 18 Manufacturing Time (weeks)

20. 19 Achievements  Load Reduction (> 50%)  Cost Reduction (>20%)  Saving Victims in earthquakes  Environmental Benefits  Energy Savings

21. 20 Conclusion  It has strength points  It has improving points  A Feasibility study should be done to ensure :  Performance  Manufacturing  Use & Cost

22. 21 Questions