RETRACTABLE STRUCTURE,THERE WORKING , DETAILS ,APPLICAION, LIKE ROOF, SEATINGS, WALLS

1. RETRACTABLE
STRUCTURE
CONTEMPORARY ARCHITECTURE
PRESENTED BY: ASIF ANWAR

2. RETRACTABLE
SYSTEMS
RETRACTABLE means something which is movable or sliding . Something which can be pulled backwards
and inwards.
RETRACTABLE ROOF
OVER POOL
RETRACTABLE SEATING RETRACTABLE WALLS RETRACTABLE RESTAURANT
ROOF
APPLICATIONS: mostly used at places where we wish to provide an open air experience at the push
of a
Button.
Like residences, pools, stadiums etc.

3. RETRACTABLE SYSTEMS IN
RESIDENCES •Creates desirable outdoor
•used to cover patios, swimming pools, decks
•protect from direct sunlight entering the house
•open up for max. Fresh air, circulation and unmatched
views
•material used is aluminum which is light weight, strong,
and non-corrosive.
•polycarbonates sheets,
•tempered glass
•Silent motors
•rain sensor, wind sensor and timer.

4. RETRACTABLE SYSTEMS IN STADIUMS
RETRACTABLE FEILD
The retractable field is also known as a mobile pitch
and movable grass pitch. The introduction of a
sliding pitch to the stadium design is a key element
in accommodating both sports within the venue.
• When the pitch is rolled outside, a clean, flat
surface is exposed, which can be utilized for trade
shows, motor sporting events, concerts etc. .
• Turning a sports stadium into an event center can
involve a long, complex process of removing pieces
of a playing field or covering up the field entirely. A
retractable field not only stores the field in an ideal
location, but turns a lengthy process into a simple
and cost-effective automated motion.

5. RETRACTABLE SYSTEMS IN STADIUMS
A natural grass playing field requires high-energy light and water to grow attractively. An indoor, closed-
atmosphere stadium can certainly house a natural field, but the benefits of an outdoor atmosphere are still
unbeatable. With the capability to move an entire field outside, a facility owner can take even greater pride in
the look of the natural field.

6. RETRACTABLE SYSTEMS IN STADIUMS
A natural grass playing field requires high-energy light and water to grow attractively. An indoor, closed-
atmosphere stadium can certainly house a natural field, but the benefits of an outdoor atmosphere are still
unbeatable. With the capability to move an entire field outside, a facility owner can take even greater pride in
the look of the natural field.

7. RETRACTABLE SYSTEMS OF ROOF
Used in buildings
•Residences
•Sport stadiums
•Restaurants
•Swim centers
In this method whole roof can be moved or
drawn back within a short time.
Roofing Materials of Retractable Roof
Structures
•Glass
•Polycarbonate
•Ethylene Tetrafluoroethylene (ETFE)
•Photovoltaic
SINGAPORE NATIONAL
STADIUM

8. RETRACTABLE SYSTEMS OF ROOF
MERCEDES BENZE STADIUM
(OPEN STATE)
MERCEDES BENZE STADIUM
(CLOSED STATE)

9. •Roof designed with tracks so as to convert any interior space
into outdoor space. These roof can be used in residences ,
bars, swim centers, etc. to provide open air experience.
•Some specifications such as flexibility, beautification, and
authentication have made suitable this kind of construction for
the wide span roof stadiums. According to this, the most
important view point in these special projects is how to cover
the wide span open roofs. Therefore, identification of structural
systems used in these stadiums is important
RETRACTABLE SYSTEMS OF ROOF

10. RETRACTABLE SYSTEMS OF ROOF
MERCEDES BENZE STADIUM
(OPEN STATE)

11. RETRACTABLE SYSTEMS OF ROOF

12. RETRACTABLE SYSTEMS OF ROOF

13. RETRACTABLE SYSTEMS OF ROOF
RAIL PREVENT FROM
HANGING

14. RETRACTABLE SYSTEMS OF ROOF

15. RETRACTABLE SYSTEMS OF ROOF

16. RETRACTABLE SYSTEMS OF ROOF

17. TYPES OF RETRACTABLE ROOF
•SLIDING AND OVER LAPING
•FAN SHAPED
•ACCORDION
SKY DOME TORONTO
SLIDING AND
OVERLAPING
Wimbledon Central
Court
ACCORDION
MILLERS PARK
FAN SHAPED
BC PLACE
CANADA, UMBRELLA
Retractable roofs are normally composed of rigid, steel moving panels. Panels consist of large steel trusses
and are powered by large, mechanical drive systems. Retractable roofs can move in a variety of directions,
including vertical, horizontal, parallel, fan-shaped revolving and central revolving.
There also different types of retractions, including overlapping, stacking and folding, and roofs can be divided
into any number of sections.

18. SLIDING RETRACTABLE ROOF
The roof of the covered stadium is composed of two or more movable elements, which are moved
horizontally in the transverse direction of the building.
• Steel lattice of the movable roof structure slides along two main transverse beams by means
of wheels and electric motors. With movement of the roof elements the entire playing field opens
up, while stands remain under the fixed part of the roof.
•The stadium or industrial buildings commonly use 2-D panels roofs composed of steel frames with
a covering material as the structural system for their retractable roof.
Atlanta
Atlanta stadium (with 8-sided
retractable roof)

19. OVERLAPPING RETRACTABLE ROOF
The structure was designed to allow for large open concourses to increase fan comfort. Generally,
roofs for stadiums and industrial buildings have some curvature, either arch like or dome shaped.
• The roof has eight panels-two being fixed and six able to move. Each half of the roof can move
independently and is cabledriven using gantry crane technology.
• The six telescoping panels consist of trusses fitted with multiwheeled bogies at each end, and can be
retracted in 4 1/2 minutes, revealing a 5.3-acre opening to the sky.
• Each panel is supported by the panel beneath it and moves on a steel wheel guide roller
arrangement.
Bank One Ballpark, Phoenix, Arizona

20. OVERLAPPING RETRACTABLE ROOF
Conceptual 3D Form:
The computer control system adjusts the roof opening in a fashion
similar to that of a camera aperture for the angle of the sun, allowing
the maximum amount of light on the field and the least on the seats
to reduce heat gain.
•The six, 800-ton panels are pulled by four miles of steel cable
attached to two gear boxes and two 200 horsepower electric motors.
•o reduce the weight of the roof and its effect on the drive
mechanism, high-strength steel (65ksi) was used in the roof trusses.
• This type of Panel systems are commonly used for large roof
areas, typically in the range of 5,000 m2 to as much as 50,000 m2

21. FAN SHAPED RETRACTABLE ROOF
Miller Park in Milwaukee, Wisconsin, with its fan-shaped
retraction and unique geometry, required a great deal of
wind load studies. Roof also had to be designed with
particular attention paid to snow loading and the various
patterns it could take
The total roof span is covered using 8 panels, where 2
panels are fixed on the either side and other 6 panels are
movable or sliding.
The steel panels rotate around a hinge located at the front
of the stadium, behind home plate. The result is a dynamic,
fan-shaped retraction that opens up from center field out
until all panels are stacked above seating areas along the
baselines.
Miller Park, with a fan style roof

22. FAN SHAPED RETRACTABLE ROOF
WORKING-Common concept on which almost all retractable roof
work
Roofing Panels are adjusted over carriers (steel trusses) and these carriers roll over the steel rails which are
powered by DC motors. Thrust releasing mechanism is integrated into retractable roof stadiums or we can
say that it works on thrust releasing mechanism. Thrust is a force which drags the machine. The best
example of thrust is the movement of aircraft.
Minute

23. RETRACTABLE SEATING SYSTEMS
Retractable seating systems are tiers of seating that fold away in to a space the
depth of a single row. They are most commonly used in multipurpose spaces
wheres eating is not always required, and can be designed to be stored in situ or
in a separate location.

24. RETRACTABLE SEATING SYSTEMS
•Seat framesare manufactured from steel, which is then galvanized or thermoplastic- coated to provide
protection against corrosion and wear
• To many existing venues are evolving into multipurpose environments. Its no longer financially viable for a
venue to cater to one event type, and they must be to accommodate concerts, conventions and seminars, as
well as different types of sporting events through out the year.
MATERIALS USED:

25. SOME EXAMPLES IN INDIA
RETRACTABLE ROOFS USED IN INDIAN HOUSES

26. Why limited use in India?
Retractable roof that can cover the stadium and protect it from rainfall so that precious time can be saved
and along with it but..
• it is not economical.
• there wont be any impact of Moisture and weather on the Pitch and henceforth impact of bowlers will be
lost
• Stadium is not always completely filled with a full crowd.
CONCLUSION
An entire playing field moved to enhance the utilization of a stadium as well as the life of the field itself.
•Retractable roof system are very useful in maintaining comfortable temperature in buildings.
•A retractable roof system protects outdoor areas and help the owners to enjoy the outdoors all year
without worrying about the weather

27. REFERENCES
https://en.wikipedia.org/wiki/Retractable_roof
https://en.wikipedia.org/wiki/Sapporo_Dome
https://www.bloomberg.com/ss/06/08/wow_top10/source/4.htm
https://inhabitat.com/worlds-first-sliding-pitch-makes-tottenham-
hotspur-stadium-fit-for-both-us-and-uk-football/
http://www.azcardinalsstadium.com/
https://www.uni-systems.com/files/broch_cardinals_stadium.pdf
https://www.uni-systems.com/files/broch_company_profile.pdf
http://old.seattletimes.com/sports/allstar/safeco/retr_roof.html
https://www.uni-systems.com/Specialty-Kinetic-Structures/retractable-
flooring.html#sthash.ozB1iOXp.dpuf
https://pdfs.semanticscholar.org/2f16/974bb67830eb3faf34094302b0911
77576e1.pdf
https://mercedesbenzstadium.com/

28. THANK YOU
asifanwar30@gmail.com