This document provides an overview of the design of a duplex villa built using precast concrete technology. It discusses the advantages and disadvantages of precast construction, components of precast walls, production process involving battery moulds, planning and structural design of elements like slabs, walls, footings using software. It also describes the execution, construction requirements and concludes with an overview of using precast concrete as a strong and efficient building material.

1. GLOBAL INSTITUTE OF
ENGINNERING & TECHNOLOGY
Presented by :-
MOHD HOZAIFA FAISAL
CIVIL FINAL YEAR(2015)
11U61A0121

2. DESIGN OF DUPLEX VILLA
BUILT WITH PRECAST
CONCRETE TECHNOLOGY

3. CONTENTS
 INTRODUCTION
 ADVANTAGES/DISADVANTAGES OF PRECAST
 COMPONENT OF PRECAST
 PRODUCTION PROCESS
 PLANNING
 ANALYSIS & DESIGN
 EXECUTION
 CONSTRUCTION REQUIRMENTS
 OVERVIEW
 CONCLUSION

4. INTRODUCTION
Building and houses are one of the oldest
construction activities of human beings. The
construction technology has advance since the
beginnings from primitive construction technology
to the present concepts of modern houses
buildings. The present construction methodology
for the buildings calls for the best aesthetic look
high quality and fast construction , cost effective
and innovation touch.

5. WHAT IS PRECAST ?
The word “pre-cast” stands
for the product which is cast
before (pre) used in the
construction .

6. WHY PRECAST?
By producing pre-cast concrete in a controlled
environment (typically referred to as a precast plant) the
precast concrete is afforded the opportunity properly
cure and the closely monitored by the plant employees.

7. ADVANTAGES OF PRE-CAST
TECHNOLOGY
 Quality Control
 Environment Friendly
 Weather Resistant
 Reduced Water Dependency
 Low Maintenance
 Efficiency

8. DISADVANTAGES OF PRE-CAST
CONSTRUCTION
 Precast construction is applicable only for large scale
construction.
 The storing and handling of pre-casted wall or slabs
required skilled labour.
 After erection no modifications of the structure can be
executed.

9. COMPONENTS OF PRECAST WALLS
SPACERS SLEEVES PVC COVER
BLOCKS

10. MAGNETS DOWELS LIFTING
HOOKS

11. WALL PRODUCTION
CLEANING &
OILING
STEEL
SHUTTERING
REINFORCEMENT
IN BATTERY
MOULD
CHECKING
PLUMBING &
ELECTRICAL
ARRANGEMENT
REINFORCED CSP
CSP
TRANSFERRING IN
BATTERY MOULD
CONCRETE
POURING OR
CASTING
CURING

12. BATTERY MOULD PRODUCTION
 Prefabrication of concrete
beams, columns and walls in
a manually adjustable battery
mould is a highly profitable
production method. These
battery mould consists of a
serious panels which roll on
rails .

13. COLD SHUTTER PLATE
The cold shutter plates are furnished
outside the battery mold. Furnishing
racks are situated in a separate area
close to the battery moulds. Cold
shutter plates are those where the wall
is produced

14. STEAM CURING
Steam curing is a process for hardening concrete,
cement and mortar that involves exposure to warm
steam.

15. REPLACING OF WALLS
 After a curing period of 6-8 hours , the walls are
stripped and placed in the racks.

16. STOCK YARD FOR STORAGE OF
PRECASTED WALLS
 After battery cases moulding the
walls are placed in the store
house constructed near the
batching plant. The storage house
consists of various group of walls
which are divided as per
requirement .

17. HANDLING, STORAGE AND
DELIVERY
 The handling process mainly involves the removal of
precast elements from the mould, transportation to
the storage yard, loading and unloading and erection
of these element at the job site.

18. SCHEMATIC SKETCH OF BATTERY
MOULD

19. PLANNING
 All the aspects is to be followed as per sun diagram &
standards .
 Built up area: 1710 sft.

20. STRUCTURAL COMPONENT OF
DUPLEX VILLA
DESCRIPTION NO’s
EXCAVATION 2 m depth
P.C.C Bed 8 no’s
STRAP FOOTING 8 no’s
PLINTH WALLS PL1 to PL22
GROUND FLOOR
WALLS
GF1 to GF20
FIRST FLOOR WALLS FF1 to FF22
PARAPET WALLS PW1 to PW16

21. ANALYSIS & DESIGN OF DUPLEX
VILLA
E-TABS(v9.2.0) is a special
purpose computer program
developed specifically for
building structures which offers
the widest assortment of analysis
and design toots available for the
structural engineer working on
building structure.

22. SLABS
 It is the horizontal piece of
concrete, put on the walls
or columns of a structure.
It serves as a walking
surface and also serve as a
load bearing member.

23. LOADS ON SLABS
Load consideration in one way & two way slab
DEAD LOAD
1. Partition wall load
2. Floor finishes
3. Self weight
LIVE LOAD
1. Balcony & Staircase:3KN/M2
2. Bed room, Living room, Hall, Kitchen & Drawing Room: 2KN/M2

24. DESIGN OF SLAB
 Calculate the loads.
 Find out the area of steel in both
directions.
 Find out the minimum area of
steel.
 The amount of steel provided
should at greater of calculated
Ast or minimum Ast.
 Calculate the spacing in between
two bars so that the flow of
concrete should be easy.
 Check for shear.

25. PRECAST WALLS
 M45 Grade of concrete is
used for precast walls.
 Fe500 Grade rebar.
 Analysis & Design of precast
load bearing walls for
duplex villa using E-tabs.

26. FOOTINGS
A concrete support under
a foundation that rests in solid
ground and is wider than
the structure supported.
Footings distribute the weight
of the structure over the
ground.

27. LOADS ON FOOTINGS
 Total Load on slab (Dead load + Live load).
 Load of Partition walls coming onto slab .
 Self load of precast walls x Number of floors.

28. DESIGN OF FOOTINGS
 Total load
 C.G of loads
 S.B.C of soil
 Area of footing required
 Projections of footings
 Eccentricity
 Maximum pressure under footings
 U.D.L on foundation beam

29. EXECUTION
MARKING EXCAVATION PCC BED

30. FOOTING DOWEL PLINTH
WALLS
BACKFILL GRADE SLAB

31. CONSTRUCTION REQUIREMENT
 Elements of control: Alignment , verticality and level
 For walls:
Vertical deviation +2 mm, -2mm
Horizontal deviation 0 mm
 For Beam & Slab:
Departure from intended horizontal position, +2 mm or -2 mm
Departure from intended vertical position, +2 mm or -2 mm

32. WALL POSITIONING :
Mark a line parallel to and 100 mm from
from the external edge of the edge of wall.
Place shim plate @500 c/c on the floor and
level to wall soffit. Shim plate may also be
placed on non shrink motor bed and allow
to set.
Adjust position of the dowel bar.

33. CONCLUSION
 Today’s precast concrete is among the strongest and
structurally sound building materials on the market
It has come through many design innovations and
upgrades .
I would like to thanks my college for providing me a
great opportunity to work & learn.

34. OVERVIEW

35. THANK YOU