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2. FIVE STEP PROCESS
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A multi-story structure between 35-100
meters tall, or building of unknown height
from 12-39 floors is termed as high rise
A high-rise building is one with
four floors or more, or one
15 meters or more in height
All buildings 15m and above in
height shall be considered as
high rise buildings
Any structure where the height
can have a serious impact on
evacuation
A high rise is being higher than
70 feet (21m)
3. NEED OF HIGH RISE BUILDING
High rise buildings are becoming prominent these days due to following
reasons scarcity of land increasing demand for business and residential
space economic growth technological advancement innovations in
structural systems desire for aesthetics in urban setting cultural significance
and prestige human aspiration to build higher
4. TYPES OF FOUNDATION
Shallow Foundation System
i. Spread Foundation
ii. Mat/Raft Foundation Shallow Foundation System
i. Pile
ii. Pile walls
iii. Diaphragham wall
iv. Caissons
5. CLASSIFICATION OF TALL BUILDING STRUCTURAL SYSTEMS
Structural systems of tall buildings can also be divided into
two broad categories
This classification is based on the distribution
of the components of the primary lateral
load-resisting system over the building. A
system is categorized as an interior structure
when the major part of the lateral load
resisting system is located within the interior
of the building. Likewise, if the major part of
the lateral load-resisting system is located at
the building perimeter, a system is
categorized as an exterior structure. It should
be noted, however, that any interior structure
is likely to have some minor components of
the lateral load-resisting system at the
building perimeter, and any exterior structure
may have some minor components within the
interior of the building.
INTERIOR
STRUCTURE
EXTERIOR
STRUCTURE01
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6. ADVANTAGES
A major cost of concrete structure is the required formwork to
retain the concrete till it can be safely de-shuttered and be able to
support itself and other imposed loads
The framework needs to be continually removed to newer
locations and then re-erected
Continuous use of manpower and lifting equipment like cranes
In the case of slip form building, the formwork is erected only
once and remains intact until the entire structure is completed
Great reduction in the cost of formwork as wee as time saving for
re-erection
Cost effective
The reduction in the movement of formwork and workers also
leads to far more safe working conditions that also make it a
major advantage
7. SAFETY
Working platforms,
guard rails, and ladders
are built into the
completed units of
market-leading
framework systems.
Complete wind-shield
protection on platform
edges is also possible
Self-climbing formwork
systems are provided
with integral free-fall
braking devices
The setting rate of
concrete in those parts
of the structure
supporting the form is
critical in determining
the rate at which
construction can safely
proceed
The repetitive nature of
work means that site
operatives can quickly
become familiar with
health and safety
aspects of their job
8. SUSTAINABILITY FEATURES
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The formwork system is
easy to clean and reuse
with little framework waste
generated compared to
traditional formwork
Climbing formwork systems
offer simplicity, safety and
cost effectiveness for certain
high-rise building structures
The repetitive nature of the
work, combined with the
engineered nature of the
formwork, allows fine
tuning of the construction
operations, which in turn
leads to minimal
concrete wastage
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9. BENEFITS
Fast construction for large layouts
Fully assembled units can be manoeuvred quickly
into place
Using appropriate quality control, high quality
surface finishes can be achieved
Reduced long-term workforce requirement on site
The need for infill areas and decking joints is
minimised
Individual components of the framework system can
be precisely adjusted
Repetitive nature of the work makes it easier to plan
construction activities