A frame system uses precast linear elements like columns and beams to carry loads, with no load-bearing walls. Connections are made using metal bearing plates and anchor bolts cast into the ends of columns and beams. After the elements are joined mechanically, the connections are grouted to provide bearing and protect the metal components. This system relies on columns and beams to carry loads rather than large wall panels.
It is the presentation based on precast concrete construction which includes each and every point and scope which may be useful to civil engineering students
It is the presentation based on precast concrete construction which includes each and every point and scope which may be useful to civil engineering students
Precast and Prefabricated components and structures and the connection betwee...nishant patyal
Building construction is an ancient human activity. It began with the purely functional need for a controlled environment to moderate the effects of climate. Constructed shelters were one means by which human beings were able to adapt themselves to a wide variety of climates and become a global species
Tube structures and its type with comparison .Udayram Patil
Hollow tube section always provide greater strength. So the same concept is applied to the building. Tubed system is designed to act like a three dimensional hollow tube structure which result in increased load resistance .
PRECAST CONCRETE - introduction, applications, advantages, disadvantages, uses, construction and joinery details, precast components, examples of buildings using precast components and more information.
Prestressed concrete is a structural material that allows for predetermined, engineering stresses to be placed in members to counteract the stresses that occur when they are subject to loading.
Precast and Prefabricated components and structures and the connection betwee...nishant patyal
Building construction is an ancient human activity. It began with the purely functional need for a controlled environment to moderate the effects of climate. Constructed shelters were one means by which human beings were able to adapt themselves to a wide variety of climates and become a global species
Tube structures and its type with comparison .Udayram Patil
Hollow tube section always provide greater strength. So the same concept is applied to the building. Tubed system is designed to act like a three dimensional hollow tube structure which result in increased load resistance .
PRECAST CONCRETE - introduction, applications, advantages, disadvantages, uses, construction and joinery details, precast components, examples of buildings using precast components and more information.
Prestressed concrete is a structural material that allows for predetermined, engineering stresses to be placed in members to counteract the stresses that occur when they are subject to loading.
Modular high rise construction seminar presentation
History of modular construction
Prefabrication
Prefabricated buildings
Difference between prefabrication and modular buildings
Modular building blocks
Examples of modular construction
Advantages of modular construction
Disadvantages of modular construction
Methods of modular construction
Modular construction techniques
Temporary modular construction
Permanent modular construction
TOP 10 B TECH COLLEGES IN JAIPUR 2024.pptxnikitacareer3
Looking for the best engineering colleges in Jaipur for 2024?
Check out our list of the top 10 B.Tech colleges to help you make the right choice for your future career!
1) MNIT
2) MANIPAL UNIV
3) LNMIIT
4) NIMS UNIV
5) JECRC
6) VIVEKANANDA GLOBAL UNIV
7) BIT JAIPUR
8) APEX UNIV
9) AMITY UNIV.
10) JNU
TO KNOW MORE ABOUT COLLEGES, FEES AND PLACEMENT, WATCH THE FULL VIDEO GIVEN BELOW ON "TOP 10 B TECH COLLEGES IN JAIPUR"
https://www.youtube.com/watch?v=vSNje0MBh7g
VISIT CAREER MANTRA PORTAL TO KNOW MORE ABOUT COLLEGES/UNIVERSITITES in Jaipur:
https://careermantra.net/colleges/3378/Jaipur/b-tech
Get all the information you need to plan your next steps in your medical career with Career Mantra!
https://careermantra.net/
Water billing management system project report.pdfKamal Acharya
Our project entitled “Water Billing Management System” aims is to generate Water bill with all the charges and penalty. Manual system that is employed is extremely laborious and quite inadequate. It only makes the process more difficult and hard.
The aim of our project is to develop a system that is meant to partially computerize the work performed in the Water Board like generating monthly Water bill, record of consuming unit of water, store record of the customer and previous unpaid record.
We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
Online aptitude test management system project report.pdfKamal Acharya
The purpose of on-line aptitude test system is to take online test in an efficient manner and no time wasting for checking the paper. The main objective of on-line aptitude test system is to efficiently evaluate the candidate thoroughly through a fully automated system that not only saves lot of time but also gives fast results. For students they give papers according to their convenience and time and there is no need of using extra thing like paper, pen etc. This can be used in educational institutions as well as in corporate world. Can be used anywhere any time as it is a web based application (user Location doesn’t matter). No restriction that examiner has to be present when the candidate takes the test.
Every time when lecturers/professors need to conduct examinations they have to sit down think about the questions and then create a whole new set of questions for each and every exam. In some cases the professor may want to give an open book online exam that is the student can take the exam any time anywhere, but the student might have to answer the questions in a limited time period. The professor may want to change the sequence of questions for every student. The problem that a student has is whenever a date for the exam is declared the student has to take it and there is no way he can take it at some other time. This project will create an interface for the examiner to create and store questions in a repository. It will also create an interface for the student to take examinations at his convenience and the questions and/or exams may be timed. Thereby creating an application which can be used by examiners and examinee’s simultaneously.
Examination System is very useful for Teachers/Professors. As in the teaching profession, you are responsible for writing question papers. In the conventional method, you write the question paper on paper, keep question papers separate from answers and all this information you have to keep in a locker to avoid unauthorized access. Using the Examination System you can create a question paper and everything will be written to a single exam file in encrypted format. You can set the General and Administrator password to avoid unauthorized access to your question paper. Every time you start the examination, the program shuffles all the questions and selects them randomly from the database, which reduces the chances of memorizing the questions.
Online aptitude test management system project report.pdf
BC - Precast Concrete.pdf
1. Chair of Building Construction
2017
Prepared by: Habteselassie Dejene (MSc in CoTM)
1
PRECAST CONCRETE CONSTRUCTION
2. Chair of Building Construction
2017 2
1. What – definition , unique features
2. When – Historical overview
3. Why – Advantages and disadvantages/challenges
4. How many –
a. Precast building elements: Foundation, walls, slab, beams, stair, column
b. Types of precast building systems
- Frame systems, Large-panel systems, Slab-column systems and Mixed systems
CONTENT
3. Chair of Building Construction
2017 3
Pre-fabrication - Production in advance
Precast concrete is a construction product produced by casting concrete in a
reusable mold or "form” mostly in a factory
DEFINITIONS
4. Chair of Building Construction
2017 4
Precast construction – construction of buildings where the majority of
structural components are standardized or modularized and produced in
plants in a location away from the building site, and then transported to the
site for assembly.
DEFINITIONS
5. Chair of Building Construction
2017
5
Transport
Assembling
Produce individual elements
6. Chair of Building Construction
2017 6
- The history of prefabrication in the west begins with Great Britain‟s global
colonization effort.
- In the sixteenth and seventeenth centuries, settlements in the Colonies
required a rapid building initiative.
- Since the British were not familiar with many of the materials in abundance in
the colony countries.
- Components were manufactured in England and shipped by boat to the
various locations worldwide.
HISTORICAL OVERVIEW
7. Chair of Building Construction
2017 7
- The earliest of such cases recorded was in 1624, when houses were prepared
in England and sent to the fishing village of Cape Anne in what is now a city in
Massachusetts.
HISTORICAL OVERVIEW
8. Chair of Building Construction
2017 8
1. Modular or dimensional coordination:
- Module is a standard unit of size used to coordinate the dimensions of a
building and components, At an international level, 100 mm is accepted as the
basic module „„M“
- Enables the coordination between the different parts that make up the total
structure/construction which are supplied from widely separated sources.
- Building components will be multiples of basic module
FEATURES
9. Chair of Building Construction
2017 9
1. Modular or dimensional coordination: reasons for module adaptation
- Reduce time of production and installation of components,
- Achieving repeatability and
- Able to construct building at lower cost.
FEATURES
13. Chair of Building Construction
2017 13
2. The degree of prefabrication: varies from single elements like column,
beam, slab, ….. to room sizes called capsules.
- It is affected by the available production capacity & transportation mechanisms
FEATURES
14. Chair of Building Construction
2017 14
Stair Triple story high column
FEATURES
15. Chair of Building Construction
2017
Completed in 1972 the Nakagin Capsule Tower was the worlds first capsule architecture
built for actual use. Kisho Kurokawa's tower was meant to draw residents from the
suburbs back to central Tokyo
FEATURES
Nakagin Capsule Tower Interior
16. Chair of Building Construction
2017 16
3. Industrial production: The components are manufactured by industrial
methods: Standardization, Mechanization, Automation and Mass production
principles.
FEATURES
17. Chair of Building Construction
2017 17
3. Industrial production: standardization
- Mechanization: an effort to move standardization to greater economies of scale, use of
advanced mechanical machinery, that reduce human labor.
- Mass production: the concept is to produce as much of the same thing in order to bring
down the cost of a single item.
- Automation: The development of digitally informed manufacturing machinery via
computer numerical control and CAD/CAM software.
- Mass customization working to maximize the benefits of mechanization and automation
production methods, reducing labor costs, but works to preserve the benefits of variability
and customization in the output.
FEATURES
18. Chair of Building Construction
2017 18
4. Demands transportation mechanism : transportation of these heavy
structures from factory to site is one key aspect of prefab construction system.
- Large low bed vehicle and cranes ( for loading, unloading and assembly ) are
needed.
FEATURES
19. Chair of Building Construction
2017 19
5. Prestressing: describe the process of introducing internal forces (stress) into
a concrete during the construction process in order to counteract the external
loads that will be applied when the structure is put into use (known as service
loads).
- These internal forces are applied by tensioning high strength steel, which can
be done either before or after the concrete is actually placed.
- Pre-tensioning: the steel is tensioned before concrete placement
- Post-tensioning: the steel is tensioned after concrete placement
FEATURES
21. Chair of Building Construction
2017 23
6. Joining mechanisms: very simple details
a. Dry joints: are constructed by bolting or welding together steel plates or other
steel inserts cast into the ends of the precast elements for this purpose.
b. Wet joints: are constructed with cast-in-place concrete poured between the
precast elements. To ensure structural continuity, protruding reinforcing bars
from the panels (dowels) are welded, looped, or otherwise connected in the
joint region before the concrete is placed.
FEATURES
23. Chair of Building Construction
2017 25
7. Anchoring, lifting points: metals or steel inserts casted at some logical
points of the precast elements for lifting purpose.
- Has to be located in consideration of the center of mass
- A minimum of two lifting points are needed to have a proper balanced
movement.
FEATURES
24. Chair of Building Construction
2017 26
Does precast system have advantages?
25. Chair of Building Construction
2017 27
There are three main advantages of precast construction:
I. Time
II. Cost
III. Quality
ADVANTAGES OF PRECAST BUILDING SYSTEM
26. Chair of Building Construction
2017 28
I. Time advantage: a short construction period helps to meet tight deadlines.
1. Increased paralleling of activities: Fabrication of elements during
permitting or site preparation or foundation preparation saves time. More
scheduling advantages or options.
2. All-Weather Construction: precast components can be produced and
erected in summer conditions, regardless of weather conditions.
3. Fast and smooth erection:
- No or minimal adjustments and surprises of details and shapes.
- Formwork and scaffolding construction is eliminated.
ADVANTAGES OF PRECAST BUILDING SYSTEM
27. Chair of Building Construction
2017 29
I. Time advantage: ….. continued
4. No Curing period: the concrete has already attained its strength before
erection in the production factory/site.
5. Minimal on site finishing work:
- Pre-cast concrete elements have smooth surface that do not require
plastering because of the precise factory formworks.
- Any kind of desired surface finish will be applied in the production process
6. Minimum transaction or one stop shopping:
ADVANTAGES OF PRECAST BUILDING SYSTEM
28. Chair of Building Construction
2017 30
II. Cost advantage:
1. Shorter construction period: Time is money in construction.
- Minimized overhead cost: additional cost due to prolonged construction
period
- Functionality of the building in a short period: income generation
ADVANTAGES OF PRECAST BUILDING SYSTEM
29. Chair of Building Construction
2017 31
II. Cost advantage: …continued
2. Minimal resources = Minimum cost.
- Minimal waste since elements are produced in controlled factory
environment. There is a lot of wastage during site cast construction.
- No plastering is required.
- Perfect and sufficient designs that have the prescribed size especially
thickness of concrete layer.
- The steel reinforcement is used exactly to requirement, optimally used.
ADVANTAGES OF PRECAST BUILDING SYSTEM
30. Chair of Building Construction
2017 32
II. Cost advantage: …continued
3. Minimized formwork cost: many elements are produced with a single
formwork or mold. [material & labor cost minimized ]
4. No need of shoring and scaffolding: the structures are self supporting.
5. Low maintenance cost: Precast structures require less maintenance
6. Bulk purchase of materials by the producers.
ADVANTAGES OF PRECAST BUILDING SYSTEM
31. Chair of Building Construction
2017 33
III. Quality advantage:
1. Highly precise and simple details:
- Produces a high standard of workmanship in factory conditions - reduces
potential for accidents, addresses on-site skill shortage.
- This production technology is extremely precise when it comes to measuring.
ADVANTAGES OF PRECAST BUILDING SYSTEM
32. Chair of Building Construction
2017 34
II. Quality advantage: …continued
2. Unusual shapes: increased design freedom in terms of shape
- Concrete mouldability helps designers to copy classical details like keystones
and capitals or match the finish of materials like weathered stones.
ADVANTAGES OF PRECAST BUILDING SYSTEM
33. Chair of Building Construction
2017 35
II. Quality advantage: …continued
3. High quality and versatile surface finish: provides architects with options
for different color, texture or any intended surface finish.
- Smooth due to being produced in a factory molds: plastering is not required
thus, it can be left exposed or painting the concrete surface is enough.
- Any kind of color or texture can be created in a consistent manner.
ADVANTAGES OF PRECAST BUILDING SYSTEM
34. Chair of Building Construction
2017 36
II. Quality advantage: …continued
4. Structural efficiency and reliability:
- The usually prescribed thickness of the fixed concrete layer can be reduced.
- The steel reinforcement can be built exactly to requirement and therefore
used optimally.
- The quality can be checked before a unit is erected into the structure.
- Advanced technologies used in the precasting plants create an improved
quality product (i.e. reduced tolerances, thinner sections, engineered
solutions) compared with cast-on-site concrete.
ADVANTAGES OF PRECAST BUILDING SYSTEM
35. Chair of Building Construction
2017 37
II. Quality advantage: …continued
5. Environmentally friendly: helps the environment by conserving natural
resources and reducing wastes and the environmental impacts of new
construction.
- Optimum use of materials or resources
- Precast concrete units can entirely be re-used reinstalled in the same building
or even transported a short distance and used in a comparable structure
- It minimize noise and dust etc. at a site.
ADVANTAGES OF PRECAST BUILDING SYSTEM
36. Chair of Building Construction
2017 38
There are some disadvantages or challenges in precast construction
1. Larger groups of buildings from the same type of prefabricated elements tend
to look monotonous.
2. Less flexible in design concept than purpose made structures, it is less
customized
3. Connection between the precast concrete units can present problems.
4. Transportation costs may be higher for large or heavy prefabricated sections
5. Large prefabricated sections require heavy-duty cranes and precision
measurement and handling to place in position.
DISADVANTAGES OF PRECAST BUILDING SYSTEM
37. Chair of Building Construction
2017 39
There are some disadvantages or challenges in precast construction
6. Employment opportunity is lost:
- Local jobs may be lost, if the work done to fabricate the components being
located in a place far away from the place of construction.
DISADVANTAGES OF PRECAST BUILDING SYSTEM
38. Chair of Building Construction
2017 40
1. Foundation: transmit the load to the ground.
- There are two types of pad foundations a socket type and a pad with a short
starter foundation column
PRECAST BUILDING ELEMENTS
40. Chair of Building Construction
2017 42
2. Precast columns: provide support for beam and slab elements.
- Since these elements carry mainly axial loads with little bending force, they
may be reinforced without prestressing.
- Are usually square in shape multistory in height.
PRECAST BUILDING ELEMENTS
41. Chair of Building Construction
2017 43
3. Beams and girders: provide support for slabs.
- The projecting reinforcing bars will bond with concrete cast on site.
- Width: ½ of depth.
- Depth/Span: 1⁄15 of span for light loads and 1⁄12 of span for heavy loads for
rectangular, inverted tee, and L-shaped beams.
- Projecting ledgers on inverted-tee and L-shaped beams are usually 15cm
wide and 30cm deep.
PRECAST BUILDING ELEMENTS
43. Chair of Building Construction
2017 45
4. Precast slabs: used for floor and roof decks.
- Deeper elements (toward the right below) span further than those that are
shallower (toward the left).
PRECAST BUILDING ELEMENTS
Increasing depth / thickness - increasing span
44. Chair of Building Construction
2017 46
Solid flat slab :
- Width: Varies
- Thickness: 8 - 20cm
- Depth/Span: 1/40 of span
- Span: up to 8m
Double tee slab:
- Width: 244 cm, 305cm
- Thickness: 30 - 81cm
- Depth/Span: 1/28 of span
- Spans up to 30m
Hollow core slab:
- Width: 61, 122, & 244cm
- Thickness: 20, 25 & 30cm
- Depth/Span: 1/38-40 of span
- Spans 7.6m, 9.75m & 12.2m
Single tee slab:
- Width: 244 cm, 305cm
- Thickness: 91, 122cm
- Depth/Span: 1/26 -28 of span
- Spans up to 32m
45. Chair of Building Construction
2017 47
Double tees supported by wall panels
46. Chair of Building Construction
2017 48
Ribbed slab
- This slab construction system, introduced
by the Low-cost Housing Project, avoids
formwork, reduces requirements of skilled
manpower and time.
- The system has two major components:
the pre-cast beam and the slab HCB.
- The production of the slab HCB is done in
the same way as production of wall HCB
PRECAST BEAM
SLAB HCB
53. Chair of Building Construction
2017 55
5. Precast walls: used for space enclosure, to support lateral & slab loads .
- Precast concrete wall panels may be solid, hollow, or sandwiched (with an
insulating core).
- Wall panels can be ribbed, to increase their vertical span capacity while
minimizing weight, or formed into other special shapes.
PRECAST BUILDING ELEMENTS
54. Chair of Building Construction
2017 56
6. Stair: Stairs provide immediate access to working levels as construction
proceeds, no need for temporary stair for the construction purpose.
- Precast concrete flights may be casted with or with out landing
PRECAST BUILDING ELEMENTS
59. Chair of Building Construction
2017 61
Depending on the load-bearing structure, precast systems can be divided into
the following categories:
1. Frame systems
2. Large-panel systems
3. Slab-column systems with walls
4. Mixed systems
TYPES OF PRECAST BUILDING SYSTEM
60. Chair of Building Construction
2017 62
1. Frame Systems: is constructed using either linear elements
- Linear elements, columns and beams carry the loads are preferred
because of the difficulties in forming, handling, and erecting spatial elements.
- No load bearing wall
- Connections : usually beams are seated on corbels at the columns
TYPES OF PRECAST BUILDING SYSTEM
62. Chair of Building Construction
2017 64
1. Frame Systems: Example Column-to-Column Connection
- Metal bearing plates and embedded anchor bolts are cast into the ends of
the columns.
- After the columns are mechanically joined, the connection is grouted to
provide full bearing between elements and protect the metal components
from fire and corrosion.
TYPES OF PRECAST BUILDING SYSTEM
64. Chair of Building Construction
2017 66
1. Frame Systems: Example Beam-to-Column Connection
- Beams are set on bearing pads on the column corbels. Steel angles are
welded to metal plates cast into the beams and columns and the joint is
grouted solid.
TYPES OF PRECAST BUILDING SYSTEM
66. Chair of Building Construction
2017 68
1. Frame Systems: Example Slab-to-Beam Connection
- Hollow core slabs are set on bearing pads on precast beams. Steel reinforcing
bars are in inserted into the slab keyways to span the joint.
- The joint is grouted solid.
- The slab may remain untopped, or topped
with 6 -8cm of cast in place concrete.
TYPES OF PRECAST BUILDING SYSTEM
68. Chair of Building Construction
2017 70
1. Frame Systems: Site cast Concrete Toppings
over precast Slabs
- Greater floor strength and stiffness
- Greater fire resistance
- Greater acoustic isolation
- Allow easy integration of electrical services into
floor system
- Create a smoother, flatter floor surface.
TYPES OF PRECAST BUILDING SYSTEM
70. Chair of Building Construction
2017 72
2. Large-panel systems: composed of large wall and floor concrete panels
connected in the vertical and horizontal directions so that the wall panels
enclose appropriate spaces for the rooms within a building.
- The loads are carried by the panels
- No Column, No beams
- Thickness of wall panels ranges from 12 cm for interior walls to 30 cm for
exterior walls.
TYPES OF PRECAST BUILDING SYSTEM
73. Chair of Building Construction
2017 75
3. Slab-Column Systems with Shear Walls: The slab-column structure
resists mainly gravity loads
- The structural elements are column and slab, there is no beam
- The systems rely on shear walls to sustain lateral load effects.
- There are two main systems in this category:
a. Lift-slab system with shear walls
b. Prestressed slab-column system
TYPES OF PRECAST BUILDING SYSTEM
74. Chair of Building Construction
2017 76
3. Slab-Column Systems with Shear Walls:
a. Lift-slab system with walls: the floor slab and the flat roof are cast one over
the other at ground level at around columns, stairs and lift cores.
- The whole slab is cast monolithically, is designed to span continuously
between and across points of support/columns, minimizes thickness of slab.
- the slab is lifted by jacks , operating on the top of each column, which lift a
pair of steel rods attached to each lifting collar in the slab being raised.
- a central control synchronizes the process for a uniform lift from all directions.
TYPES OF PRECAST BUILDING SYSTEM
75. Chair of Building Construction
2017 77
3. Slab-Column Systems with Shear Walls:
a. Lift-slab system with walls
- Lifting collars: they are cast into each slab around each column providing a
means to lift the slab and also providing shear reinforcement they are fixed to
columns by welding shear blocks to plates welded b/w column flanges and to
the collar after the slab has been raised in position.
- Connections to concrete columns are made by welding shear blocks to end of
steel channels cast into the column and by welding the collar to the wedges.
TYPES OF PRECAST BUILDING SYSTEM
79. Chair of Building Construction
2017 81
3. Slab-Column Systems with Shear Walls:
b. Prestressed slab-column system
- Uses horizontal prestressing in two orthogonal directions to achieve continuity
- The precast concrete column elements are 1 to 3 stories high.
- The reinforced concrete floor slabs fit the clear span between columns.
- After erecting the slabs and columns of a story, the columns and floor slabs
are prestressed by means of prestressing tendons that pass through ducts in
the columns at the floor level and along the gaps left between adjacent slabs
TYPES OF PRECAST BUILDING SYSTEM
80. Chair of Building Construction
2017 82
3. Slab-Column Systems with Shear Walls:
b. Prestressed slab-column system
- After prestressing, the gaps between the slabs are filled with in situ concrete
and the tendons then become bonded with the spans.
- This technology has been used in Yugoslavia during the last 40 years under
the proprietary name, “IMS Building System,” and it can be found in other
countries, such as Cuba, the Philippines, and Egypt.
- The kality prefab factory produce such kind of prefab elements.
TYPES OF PRECAST BUILDING SYSTEM
87. Chair of Building Construction
2017
The Art of Precast Concrete: Tone Texture Form
David Bennett
As a building material, precast concrete allows a wide range of sculptural forms and
design options. By treating the surface in various ways, fascinating textures and fine
finishes can be produced. This book provides a systematic overview of the variety of
applications for such concrete elements throughout Europe.
Author David Bennett provides in-depth information on newly developed, especially
lightweight forms of concrete such as GRC (Glass-Fibre Reinforced Concrete), Ductal and
CRC (Compact Reinforced Composite). A selection of some 24 projects which are of
particular significance, are documented in detail and provide a wealth of inspiring
design ideas. The appendix comprises an overview of the building practices in the
individual European countries and the availability of concrete elements. Amongst the
buildings documented are the Scottish Parliament Building in Edinburgh by Enric
Miralles Benedetta Tagliabue, the Synagogue in Dresden by Wandel, Hoefer, Lorch +
Hirsch, and the Mexican Embassy in Berlin by Gonzlez de Len.
Birkhauser September 2005