Study Program Period : S0673 / Building Construction II : 2007 CONCRETE STAIRS Meeting 6 Learning Outcome By the end of this meeting, expected student will be able to : • Student can explain conditions of concrete stair construction along with its. 3 Bina Nusantara Outline Items • Items 1 : Construction concrete stair • Items 2 : Circular stair 4 Bina Nusantara Reinforced Concrete Stair. 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 5 Bina Nusantara 6 Bina Nusantara 7 Bina Nusantara 8 Bina Nusantara 9 Bina Nusantara Slab less tread Riser Stair 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 10 Bina Nusantara Iron system : 11 Bina Nusantara 12 Bina Nusantara 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 ) 13 Bina Nusantara 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 14 Bina Nusantara 15 Bina Nusantara 16 Bina Nusantara 17 Bina Nusantara