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

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

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

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

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  50% of Building Weight  of skeleton cost  Reduce construction time  Reusable,Removable and adjustable  Easy to transport & install

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

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

8 Stress isometric

9 Top Plate Stress 0.15 t/cm2

10 Bottom Plate Stress 0.13 t/cm2

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

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

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

14 Deflection

15 Density (t/m3)

16 Cost (SR/m3)

17 Installing Time (day)

18 Manufacturing Time (weeks)

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

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

21 Questions