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
1) STRAIGHT
2) DOG LEGGED
3) QUARTER TURN NEWEL
4) OPEN NEWEL
5) 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 2.63m3
Sl.
no
.
particular quantity Rate/unit amount total
1 Material used
Cement 15 bags ₹500/bag ₹7500
Sand 0.71 m3 ₹500/m3 ₹360
Aggregate 1.43m3 ₹1000/m3 ₹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
1) Dr. B.C. PUNIA “BUILDING CONSTRUCTION”
2) “IS 456-2000” PLAIN AND REINFORCED CONCRETE.
3) “IS 800-2007”-GENERAL CONSTRUCTION OF STEEL.
4) AUTO CAD SOFTWARE.