2. CONCRETE STAIRS Meeting 6 Study Program: S0673 / Building Construction II Period: 2007

3. Bina Nusantara By the end of this meeting, expected student will be able to : Student can explain conditions of concrete stair construction along with its. Learning Outcome 3

4. Bina Nusantara Items 1: Construction concrete stair Items 2: Circular stair Outline Items 4

5. Bina Nusantara At wood stair need treatment / conservancy utilize its resilience. At reinforced concrete stair do not needed. Reinforced concrete stair weight big enough by it self, hence in the plan its construction require to get attention and also labored can be made to economize usage of materials. Reinforced concrete stair can be formed as according to desire, but basically reinforced concrete doorstep consist of: Plate stair / ordinary stair Log stair Slab less tread riser stair Reinforced Concrete Stair. 5

6. Bina Nusantara 6

7. 7

8. 8

9. 9

10. Stair which is its construction is supported by plates of tread (Aantrede) also riser (Optrede). So tread and riser is structural construction. At other stair type, and tread and riser represent construction which non structural. While structural is plate and its log Slab less tread Riser Stair 10

11. Bina Nusantara 11 Iron system : Iron can be made in the form of beugel-beugel. Earn also iron consist of interconnected beugel- beugel. Become each iron form in the form of beugel.

12. Bina Nusantara 12

13. Bina Nusantara 13 Reinforced concrete stair can be made by all kinds of form depended mould form / its of him. For arrange in steps return / stair with bordes 180 , its structure form can be made like : Stair above 3 fulcrums. Stair above 2 fulcrums. Float stair ( there is no fulcrums at bordes and wall )

14. Bina Nusantara 14 Stair become militant with stepping of wood. For this stair as structure use profile logs at ordinary stair Example : Stair by 2 profile log as its structure

15. Bina Nusantara 15

16. Bina Nusantara 16

17. Bina Nusantara 17