Construction of dog legged staircase.pptx

It is the ppt on construction of dog legged staircase

1. UNIVERSITY B. D.T. COLLEGE OF ENGINEERING AKSHATA SIDDAPPA AJJAPPAGOL (4UB20CV003) Under the guidance of Dr. C M RAVIKUMAR Associate professor Department of Civil Engineering DAVANGERE ( A constituent College of Visvesvaraya Technological University, Belagavi ) Department of Studies in Civil Engineering Internship presentation on CONSTRUCTION OF DOG LEGGED STAIRCASE IN RESIDENTIAL BUILDING Presented by

2. CONTENT INTRODUCTION ABOUT COMPANY CONSTRUCTON SITE LOCASTION PLAN OF RESIDENTIAL BUILDING STAIRCASE CONSTRUCTION OF DOG LEGGED STAIRCASE MIX DESGIN OF CONCRETE DOG LEGGED STAIRCASE AUTOCAD DRAWING COST ESTIMATION REFLECTION NOTE REFERENCE

3. INTRODUCTION An internship is a period of work experience offered by an organization for a limited period of time. It provide real world experience. OBJECTIVE OF INTERNSHIP Develop skills for interacting with practical professional In order to make practical knowledge in students Ability to communicate effectively

4. ABOUT COMPANY COMPANY PROFILE : Classic Associates consulting civil engingeers It is ISO certified company. Director of this company ER .SAMEER KHAN K.M ( M.Tech CIVIL)

5. RESIDENTAIL BUILDING SITE LOCATION  

6. PLAN OF RESIDENTIAL BUILDING

7. STAIRCASE It providing access to different floors and roof of the building. It consists of a flight of steps (stairs) and one or more intermediate landing slabs between the floor levels TYPES OF STAIRCASE STRAIGHT DOG LEGGED QUARTER TURN NEWEL OPEN NEWEL CIRCULAR

8. DOG LEGGED STAIRCASE Its Consist of two straight flights running in opposite direction There is no space between flights in plan Landing is provided at level which direction of flight changes

9. CONSTRUCTION PROCESS OF DOG LEEGED STAIRCASE 1) Staircase location and maping :   Fig.1: Staircase maping on wall Fig.2: mason’square

10.   2) Foundation and support for concrete stairs:   The foundation on which the concrete stairs rest is to be properly constructed so that the loads of the stairs or transferred into the ground successively and to resist the moment of stairs Fig.3 : Bottom support of staircase    

11. . 3) Staircase form work :   The most important step when building concrete stairs is to use a proper form work the angle of flight dimensions of thread raiser and slope of building are to be properly checked Material used wooden plywoods ,Timber   Fig.4 : Staircase form work Fig.5:Oiling on form work    

12. . 4) Steel reinforcement work : The staircase is to be reinforced with steel bars so as it carries the loads coming upon the stairs and transfer them to the ground Fig.6: staircase reinforcement

13. 5) Concreting work :   Pouring of concrete into the formworks is started from the below part to above. The concrete mix plays an important role in strength and durability of stairs Fig.7 : Pouring of concrete to staircase  

14. 6) Curing : Curing is a process of spraying water over the set concrete. Curing plays an important role on strength development and durability of concrete. Curing can start immediately after its final setting time of about 10 hour   Fig.8: Curing of stair case

15. 7) Removing of form work : The stairs requires at least 21 days to dry out completely so the removal of formwork is to be done only after 21 days

16. 8) Finishing of concrete stairs : Once the formwork is removed, the stairs can be finished in many ways as per the requirement of the use Fig.10 : plastering of staircase

17. HANDRAILS : Handrails is a rail that is designed to be grasped by the hand so as to provide safety or support. Fig.11: Handrails of staircase  

18. MIX DESIGN OF CONCRETE Concrete is a composite mixture which consist of Cement, Sand and Aggregate 1.Grade designation: M20 2. Proportion: 1:1.5:3 3. Type of cement: OPC 43 grade 4. Maximum nominal size of aggregates: 20mm 5. Maximum water cement ratio: 0.55 (Table 5 of IS 456:2000) 6. Type of fine aggregate: River sand 7. Type of aggregate: Crushed angular aggregate

19. DOG LEGGED STAIRCASE AUTO CAD DRAWING All values are in ‘mm’

20. COST ESTIMATION OF DOG LEGGED STAIRCASE Total volume of concrete work is 2.63m 3 Sl. no. particular quantity Rate/unit amount total 1 Material used           Cement 15 bags ₹500/bag ₹7500     Sand 0.71 m 3 ₹500/m 3 ₹360     Aggregate 1.43m 3 ₹1000/m 3 ₹1435     Steel 2% 384 kg ₹85/kg ₹32640     Binding wire 1 kg ₹150/kg ₹150     Form work Lumpsum of ₹1000           Total : ₹43085 2 Labours:           Mason 4 ₹650 ₹2600     Male coolie 4 ₹550 ₹2200     Female coolie 3 ₹450 ₹1350     Bar bender 4 ₹500 ₹2000           Total : ₹8150             3 Tools and plants charges 1.5%     ₹770               4 Water charges 1.5%     ₹781               5 Contractor profit 10%     ₹5279                     Grand total ₹58065

21. 1) HAND MIXING 2) MACHINE MIXING CONCRETE MIXING METHOD

22. REFLECTION NOTES The internship was a useful experience I have find out what is my strenght and weakness. The internship is a bridge between theoretical knowledge and practical work. I gained new knowledge skills and met many new people. I achieved many of my learning goals

23. REFERENCES Dr. B.C. PUNIA “BUILDING CONSTRUCTION” “IS 456-2000” PLAIN AND REINFORCED CONCRETE. “IS 800-2007”-GENERAL CONSTRUCTION OF STEEL. AUTO CAD SOFTWARE.