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Retractable Generic Specifications

Details and Description

Note: In relation to Aura Sports Floors Haro 10-10 Helsinki Engineered Sports Floor, or similar, please refer to the following clauses. Specific consideration is required for retractable seating on these floor systems.

  • 1.3 Description of the system
  • 1.4.1 Code of compliance features
  • 4.5 Quality assurance
  • 1.7 Design criteria (cross reference to Aura Haro 10-10 floor specification)
  • 1.8 Floor substructures specifications and survey processes
  • 4.2 Certification


The Retractable Systems shall be purpose designed and engineered for each specific contract, taking into account the design and operational use criteria demanded by the facility.

Based on a number of issues:-

  • Manufactured to International Standards
  • Customer Support Pre and Post Contract Award
  • Industry Experience, Proof of Completion of Similar Projects
  • Price
  • Engineering Design and Certification
  • Operational Expertise

The success of STARENA has been based on:

  • Manufactured to International Standards
  • Customer Support Pre and Post Contract Award
  • Industry Experience
  • Price
  • Engineering Design and Certification
  • Operational Expertise

General Specifications For Multi-Purpose/ Recreational Retractable Seating

1. General

1.1 Work

A. Retractable/Telescopic Seating

1.2 Related Work

  1. Electrical
  2. Sports Flooring
  3. Sports Floor Protection
  4. Non Timber Sports Floors

1.3 Description of System

The platform system shall be comprised of multiple tiers of closed deck chair platforms.

Platforms shall operate on the retractable principle, stacking vertically in minimal floor area when not in use.

The first moving row shall be secured with mechanical locks. All other rows shall be mechanically locked, operable only upon unlocking and cycling of first row.

Each platform row shall be comprised of a unitised deck component, a complete set of supportive frames and braces and such units as specified herein.

The retractable system shall incorporate a locking system permitting the use of one, several or all rows, each locked in the extended position.

1.4 Material References:

Materials and workmanship shall comply with all appropriate BCA/NCC and current Australian Standards and other country equivalent standards.

1.4.1 Code Compliance Features

Design of steel structures and connection is on the basis of the following, along with relevant BCA/NCC codes for material components.

  1. EN 13200-5 (Sub clause 5)
  2. Guidelines outlined in “Recommendations for the Specifications and Use of Tiered, Retractable and Demountable Seating” document produced by British association of Spectator Equipment Supplies (BASES) for the Recreation and Leisure Trades Association (RALTA) UK.
    • AS/NZS 1170.1:2002 Sub-clause 3.9 Grandstands
  3. Durability Testing: The seating is to be certified to the following:
    EN 12727 – “Furniture – ranked Seating- Test methods and requirements for strength and durability”.
    BS 4875:1985 – “Furniture Performance Testing” - Rating 5
  4. BSEN 13200-5:2006 - Spectator Facilities Part 5: Telescopic Stands.
  5. BSEN 13200-4:2006 – Spectator Facilities Part 4: Seats – Product Characteristics

1.5 Quality Assurance

Starena has a comprehensive policy with regards to its manufacture and installation of all products supplied.

All contractors and OEM suppliers engaged in the fabrication and installation are screened to ensure that the workmanship is of a quality and standard relative to appropriate Australian and International Standards for the type and quality of work being carried out.

All systems are engineered to ensure compliance with Local and International Engineering Standards; a suitably qualified and experienced licensed engineer does this. Through rigid monitoring of the manufacture process, Starena endeavours to ensure that all products are delivered to site on schedule and is of an appropriate quality and standard for installation.

It will be the responsibility of the specifier to furnish with their specifications, a list clarifying any deviations from the specifications, written or implied.

1.6 Submittals – Starena will submit

  1. Manufacturer’s Warranty
  2. Manufacturer’s Operating Instruction Manual
  3. Manufacturer’s Maintenance Manual

1.7 Design Criteria

Retractable seating in the absence of a specific standard for the same in Australia must comply with AS/NZS 1170.1:2002 Sub Clause 3.9 Grandstands, as well as EN13200-5 (Sub clause 5).

The retractable seating contractor must extrapolate the design and loading of the structures to comply with these stated parameters.

The platform system shall be designed to support and resist in addition to their own weight the following forces:

  • Live load, Platform rating - 5Kn/m² (minimum).
  • Side sway load of 36kg per linear metre, of row.
  • Front to rear sway load of 15kg per linear metre of row.

Railings, posts and sockets designed to withstand the following horizontal forces applied separately:

  • 74kg per metre acting outward to top rail.
  • 37kg per metre acting outward at mid rail.

All system components, workmanship and material quality covering the type of materials utilised, shall comply with relevant local, State, Federal and International Codes where applicable.

All seating systems supplied shall comply with relevant local Building Codes and Standards, Engineering Codes and safety requirements of relevant statutory codes including Fire Codes, specific to retractable seating.

All work must comply with the Building Code Australia and relevant International Standards, engineering codes and safety requirements of relevant statutory codes, including Fire Codes, specific to retractable seating.

Where specific loadings or engineering requirements are mentioned in this document, they are to be treated as a minimum requirement and do not take the place of statutory needs. These loadings are to be in compliance with Australian, New Zealand and International requirements.

The design complies and accounts for local Seismic Code Conditions.

The design must comply with the guidelines outlined in “Recommendations for the Specification and Use of Tiered, Retractable and Demountable seating” document produced by British Association of Spectator Equipment Supplies (BASES) for the Recreation and Leisure Trades Association (RALTA) UK.

  • BSEN 13200-5 (5)
  • EN 13200-5 (5)
  • BSEN 13200-4-2006
  • AS/NZS 1170.1:2002 (3.9)

1.8 Floor Substructures Specifications and Survey Processes

It is the responsibility of the Architect, the Head Contractor or the Client to advise Starena in detail of the type and nature of the timber sports floor or synthetic/concrete surfaces to be utilised on the contract and to confirm to Starena what the OEM Sports Floor supplier’s dead load per wheel is able to be accommodated by the specified floor in a rating of kilogram per wheel.

It is the responsibility of the client to ensure that the floor is capable of withstanding the live and dead loads, as imposed by the retractable seating structure. All floors, irrespective of the type of floor, prior to commencement of installation must be verified by the client and a report supplied to Starena that shows they surveyed the floor level must be finished to a FFL of ±3mm over a 1m square.

The material weight and dead/live loads of the spectators on the telescopic stands should not exceed the point loads of the bearing capacity of the floor. It has to be considered that resilient sports floors have limited bearing capacities for static and dynamic loads. It is the responsibility of the client to ensure that the floor system, irrespective of its nature, can support the system. Clients are encouraged to engage independent engineering analysis – Starena will supply wheel of path dead/live loads for consideration. Starena will not inspect the floor for fit for purpose use – that is the responsibility of the Head Contractor or client.

In addition, detailed specifications on the selected floor are to be provided to Starena. Detailed component design will not commence until this information has been provided.

All floors must be finished to a FFL of ±3mm over a 1m square area. On the basis that a very flat and level surface is required for the operation of the installation, the ±0.003 limit may be retained for the flatness assessment and be accompanied by a requirement that the finished surface be within ±0.003 of the specified level throughout the area for the installation.

The determination of compliance normally requires two processes: firstly, by measurement of a deviation below a straight edge (3m straight edge in any direction) of a nominated length, and secondly, by direct measurement of the level of the floor.

Alternate methods for assessing compliance have been developed in the USA, for application on assessing super-flat floors within the trafficable lanes in warehouses, between high-rise racking: these involve the use of specialised instrumentation with tilt sensors that are pulled across the floor.

In practical terms, the assessment generally involves direct levelling only, due to the difficulty of documenting results from measurements of deviations, especially over large areas.

The crucial parameters then become the specification of the spacing of the observations and the precision of the process.

In any method, the survey process may only take up a small part of the tolerance allowable on the surface being measured.

For determination of compliance, with a tight specification, the spacing of the observations will generally be 1.00m and for a specification of ±0.003, the survey process must be able to produce results to a tolerance of ±0.001 or better.

A survey tolerance of ±0.003 is appropriate for assessment of a surface that has a placement tolerance in the order of ±0.10.

For reliable data, with a survey tolerance of better than ±0.001, the observations may only be taken with a precise level and calibrated staff: this is a very expensive process: the observations are taken on a marked-out grid and the results are then transcribed into a cad package, for subsequent processing/review. The expense attaches to the time required for completion of the observations and the data entry process.

It is also not suitable for situations where limited head-room is available, e.g. observations under the tiered seating.

An alternative allows for the observations with a total station instrument, with modified observing routines. These instruments generally have an automatic target recognition facility, (ATR), and can track a prism as it is moved across the floor: this method allows for simultaneous determination of the position and level of the target. This data can be directly downloaded and processed within a cad/survey software package, removing the need for marking out a detailed grid and also the need for transcription of results.

The tolerance on the measurements however, is in the order of ±0.003.

A variation on this method is for the direct observation onto the floor, using the reflectorless capability of the total station instrument: a laser is used for the measurement. The advantage of this is that measurements may be taken to all areas where sight-line access to the subject surface is available, e.g. below the seating.

The tolerance on the measurements is also in the order of ±0.003.

The ATR procedure can be modified to improve the precision of the result, with manual sighting to the target: this involves a time impediment, but the precision may then be quoted to ±0.001.

A further alternative is available, which allows for very fast measurements throughout all areas, however, the reflectivity characteristics of the floor surface would need to be checked before this method could be relied upon to produce suitable results.

This method entails the use of a laser scanner for the data acquisition: a single scan would be required for the floor area with the seats in the closed position: two scans may be required for a survey of the floor, from beside the structure, with the seating open. The scanner records up to 50,000 points per second and the floor area would be recorded with approx. 5,000,000 points. This data may then be converted into a surface model with a precision of around ±0.002, depending on the reflectivity of the surface.

The model can then be interrogated to produce level values on a 1.00m grid basis.

The scanning is the preferred method, however, as noted above, the performance of the instrument on the measurements to the floor surface would need to be reviewed before the process was applied/relied upon.

In the case of a timber floor, which incorporates a rubber blocking system (in their various formats), the floor must incorporate additional timber blocking , such that the rubber blocking does not depress any more than ± 3mm under load, from the retractable system when it is moving. If timber floors do not incorporate a rubber blocking system, the design of the floor must be such to accommodate the above.

Retractable Seating.

The supplier is to provide advice and drawings for the retractable wheel of path travel which the flooring supplier is to incorporate timber blocking, as noted above. The timber sports flooring supplier is to provide a drawing showing incorporation of the blocking.

2. Products

2.1 Manufacturer

The design of Retractable Seating Systems is a complex design and construction process, requiring many years of skilled experience in design, engineering certification and fabrication.

Starena has its own experienced in-house Design Team, who are fully versed in all facets of Retractable Seating Design.

Complementing the Starena in-house Design Team are experienced external Consulting Engineers who Starena retains to provide independent Engineering Certifications of the Starena Retractable Seating Designs.

Starena works with a number of fabrication suppliers who have a long history of engagement by Starena, to fabricate Starena’s Retractable Seating Structures. Due to the individual and complex design of Retractable Seating, each project is individually designed. Generic Certification or Certification related to other projects should not be accepted. An independent design certificate is to be submitted with each project design, if so requested by the client at their cost.

All installation of Starena’s Retractable Seating Systems are undertaken by Starena’s Project Management Team.

2.2 Total Closed Deck System providing structural integrity

The deck is comprised of rigid powder coated steel nosing along its full length. The nosing is through bolted to the deck supports, which, in turn, are rigidly fixed to a steel rear riser. Deck supports are spanned by solid plywood decking material connected by through fastening. The deck supports are then also connected to the rear bracing at appropriate points.

The use of full length platform steel rear riser and nosing ensures that this is not only an extremely rigid design engineered structure, but also that no gaps are provided between decks, ensuring patron safety and preventing debris falling beneath the system.

2.3 Retractable Seating Type Structures

  1. Freestanding
  2. Wall Attached
  3. Recessed
  4. Mobile
  5. Portable

2.4 Propulsion Systems

  1. Portable Hydraulic Lift System (Mobile Units)
    Utilising a lightweight, portable self-contained Hydraulic system, these lifting units are specifically designed for use with Portable Retractable Seating Systems, provide ease of use and many years of reliable service.
  2. Integral Power (Fixed Units)
    ) Integral power drive units provide the most cost effective operation options. Drive motors are fitted to the first row to open and close the seating system. The 240V 10/15AMP motors are synchronised and seating system sections are joined together to form a single operational bank where appropriate. Systems fitted with integral power require only one person to operate the drive control pendant and a second safety observer to ensure that people stay clear of the system during operation.
  3. Power Supply
    To be 415V – 15AMP – 3 Phase for powered units, subject to project review.

2.5 Operational Finishes

  1. Self Storing Rails
    Steel self-storing rails with a height of 1.0m above the deck, with 100mm vertical steel divider bars, provide aesthetically pleasing, compliant rails for safety. Rails are fitted to the end of each deck, where required and fold with the system to provide easy storage.
  2. Removable Rails
    Like the Self Storing Rail System, these rails are aesthetically pleasing, whilst still providing full code compliance. The advantage of removable rails is the ability to interchange the rails to different section ends, if only part of the system is to be used.
  3. Side and Rear Curtains
    Side and Rear Curtains of Fire Retardant fabrics to assimilate with the facility décor are to be fitted to the retractable seating units. Curtains provide a visual screen between the seating systems under structure and patrons and are fixed in such a manner as to facilitate easy removal for cleaning and unit cycling.
  4. Last Row Closure
    Rear closure board, is a flush mounted board between the last row of seating and the wall and is to be fitted to all units.
  5. Wheel Chair Seating
    The supplier shall design and incorporate into the structure design all wheelchair and permanently disabled removable seating as designated.
    1. Notch outs for Permanent Handicap seating can be provided as required on the Architectural Drawings. The positions need to be confirmed by Starena so the under structure is not compromised in any fashion.
    2. Recoverable Notch outs as located on the architectural drawings and as confirmed by the manufacturer.
    3. Recoverable Truncations will provide a full section of Handicapped seating, including access ways
  6. Operation Pendant
    Pendant Controls for Starena’s fully automated Retractable Seating System are a standard feature. They allow for the ease of operation of the system by one qualified operator, with a safety observer watching for onlookers.
  7. Numbering
    Seat Numbers and Row numbers are supplied for fitted seats as per the Architect’s predetermined sequence.
  8. Aisle Lighting
    Aisle lights shall be fitted to each step and each riser. Starena’s preferred product is the Eco Glo luminescent aisle way step nosings. Alternatively aisle lights (optional extra) shall be 12 volt 5 watt, 2000 hr, powered by 240 volt AC transformer with backup battery power.
  9. Non Slip Treads
    All aisle step locations, including leading edge of half steps, to be fitted with a high visibility photo luminescent and anti-slip step edge, Eco glow or approved equivalent.
  10. Folding Hand Rails
    Like the Self Storing Rail System, these rails are aesthetically pleasing, whilst still providing full code compliance. The advantage of Folding Rails is the saving of the physical labour of removing and storage of handrails. These rails fold down unto the platform.
    All rails systems can incorporate timber inserts for aesthetic purposes in lieu of the vertical steel divider bars.
  11. Rear Panel
    All Starena systems have the ability to be fitted with high quality safety rear panels. They are made to match the side rails and can also be fixed, removable or fold down depending on the building structure and client requirements.
  12. Side Panel
    Timber End panels provide a neat and efficient way of closing off the ends of Retractable/Telescopic Seating System, particularly Free Standing, portable and mobile units. Side panels limit access to the under structure of the system in the open and closed position to those persons authorised. Constructed from sturdy structural Plywood, or client specified Veneer Timber, these panels provide both a visual and physical barrier.

2.6 Seat Options

Chair operations consist of manual, manual foot release, and semi-automatic.

  1. Manual
    Integrated foot bar mechanism that trips the chairs and allows for an easy fold. No spring assist with setting chairs up – 4 chairs per operation.
  2. Semi-Automatic with Foot Release
    Integrated foot bar mechanism that trips the chairs and allows for an easy fold. Spring assisted when raising the chairs to the upright position and dampening on lowering the chairs to the deck – 12 chairs per operation.
  3. Semi-Automatic with Automatic Release
    Spring assist with setting up chairs when the platform is open. Chairs automatically fold down as the system is closing – 12 chairs per operation.


Min. Chairs per Beam

Max. Chairs per Beam


Manual Operation



Tablet Arm is min. (2) chairs per beam

Semi-Auto (Foot Release)



No Tablet Arms

Semi-Auto (Auto Release)



No Tablet Arms

**The ratio of chairs to mechanisms is 2:1. Therefore, (4) mechanisms are required on a chair beam that has (8) chairs.

3. Fabrication

  1. Decking Options
    1. Clear Plywood
      Shall be from 18mm structural grade plywood, and be adhered by silicon resin. The decks are fixed to the platform, and is finished with clear polyurethane as standard . All produced in accordance with relevant Australian and International Standards.
    2. Painted Plywood
      Shall be from 18mm structural grade plywood adhered by silicone resin with either black or dark brown polyurethane finish to all edges and top surface of platform.
    3. Phenolic
      Non slip deck flooring Koskicrown, or similar, available in clear, black or brown finishes, all edges will be coated with a waterproof oil based stain.
    4. Carpet
      Available in a wide range of finishes, standards and colours to compliment the interior colour layout of your venue.
    5. Vinyl
      Available in a wide range of finishes, standards and colours to compliment the interior colour layout of your venue.
  2. Deck Front and Rear Risers
    Shall be 4mmT folded steel plate powder coated black or to the clients nominated colour as a contract variation.
  3. Formed Steel Deck Members
    Stiffener members 60X40X2.1mmT steel rectangular tubing connecting the front nosing. 100X50X3.1mmT steel tubing will be used for the rear girder frame and rear riser members shall provide support for the decking including extreme deck ends.
  4. Through-bolt Deck Structure
    Decking shall be fastened to deck stiffeners, supports and frames for structural integrity including transmittance of sway forces to the under structure. Decking retained by friction is unacceptable.
  5. Deck Construction
    Steel square tubing 40X40X1.6mmT shall be welded between sections front and rear beam , this load bearing beam is placed at least every 500 to 600mm to strongly enhance the deck platform. With exclusion of operational clearances between sections or at bank ends, decks shall be designed to prevent the passage of a major human extremity and to insure that dirt and debris will be swept to the next deck below rather than to the floor.
  6. Supporting Understructure
    Shall consist of two frames and two braces per deck per section designed to support and transmit design loads to the floor. Tubular bracing (40X40X2.1mmT) inclined and horizontal bracing (40X40X2.1mmT) shall be positively secured to rear risers to prevent lateral shift under load. Frames shall be a welding of cantilever, column and lower track of a geometry permitting ease of operation as well as interlock between adjacent frames.
    Bolted connections between columns, cantilevers and lower tracks are unacceptable.
    Each frame shall be equipped with no fewer than (4) four 121mm diameter (minimum) wheels with 36mm non-marring polyurethane face to protect wood or synthetic floor surfaces. Wheels shall be equipped with roller bearings.
  7. Row Interlocks
    Frames shall be interlocked at both top and bottom to prevent disengagement and to transmit sway forces. Cantilever shall engage with a guide roller. For the straight operation of the system, one guide roller shall be located at the middle of the deck frame. The guide roller is equipped with 2 wheels to prevent twist operation. Platform (Girder) support: Two types of girder supports are used per deck, one with a roller and one without.
    This platform prevents over travel when opening or disengagement in use. Lower track bearing shall positively engage lower track of next tier using a gravity activated locking device located at each frame to prevent disengagement during opening and shall hold open the bleacher to prevent accidental closing during use. Row lock shall be adjustable to accommodate uneven floor surfaces.
  8. All Welds
    Shall be performed by welders certified for the process employed.
  9. Finish - Steel:
    Under structure shall be debarred, cleaned and finished with low gloss powder coating. Formed steel front and rear deck members shall be powder coated to the client’s nominated colour; the standard is Black.

4. Execution

4.1 Warranty

The supplier shall provide a five (5) year warranty on all parts equipment, based on the client entering into a yearly preventative maintenance program.

The supplier shall provide details of an extended warranty program.

The warranty excludes wilful damage

4.2 Extended Warranty

All Starena Seating Systems are supplied with normally a 5 year operational warranty subject to normal use. In addition, we offer a further eight year operational warranty tied to an annual service agreement, the overall warranty is subject to the system being operated at all times by a facility nominated person or persons who shall be trained by us. Obviously normal provisions of client care and use in terms of our maintenance and operating instructions must be adhered to. As part of our installation philosophy, we contract local engineering expertise to assist with the installation of our systems. These companies work under the control and supervision of our trained installation supervision.The annual service agreement has a number of variables but in general terms the cost for a preventative maintenance program (once yearly) is dependent upon the size of the seating system and the level of warranty provisions required. This is an all-encompassing warranty and preventative maintenance program for years 3 to 10. In order to avail of this offer, it must be stated on the agreed contract terms at time of order

4.3 Certification

The structural adequacy of the seating system shall be reviewed by a registered Australian/New Zealand structural engineer listed in the National Professional Engineer Register – Section 3 (NEPR-e) maintained by the Institution of Engineers Australia or RPEQ, are an appropriately Qualified International Engineer.

This report if required to be certified by a locally registered engineer shall be provided at the client’s cost.

Please Note:

The Certificate provided shall relate to the specific units constructed for this contract. Generic certification or certification related to other projects shall not be accepted.

5. Contractors Responsibility

The contractor shall liaise with the nominated seating supplier and co-ordinate all required electrical provisions for operation of the retractable seating systems.

The contractor shall facilitate an introduction between the nominated seating and sports flooring contractors to co-ordinate and facilitate floor loading criteria and floor level requirements only. Starena will accept no responsibility for the end result of the flooring system installed.

The Head Contractor/Client shall be responsible for ensuring that Starena is supplied with the full technical specifications of the proposed floor for technical evaluation purposes only. It is the responsibility of the Head Contractor and/or the client to undertake due diligence and ensure that the flooring system and the seating are compatible with each other.

The Head Contractor or Client is fully responsible to ensure that the floor is completed to ±3mm/m² floor level. It is not the responsibility of Starena to inspect the floor to ensure that it is to the required floor level specification. If during the assembly process or post commissioning of the system it is clear that the flooring level is not to specification, which impedes the efficient operation of the retractable seating system, Starena will accept no liability for these circumstances.


Starena reserves the right to alter or amend its specifications without notice.

6. Use of Telescopic Stands

Spectators should not be admitted to the telescopic stands for its first use until the client or the client's agent, who should be a competent person, is satisfied that the structure has been properly installed and complies with the design criteria.

Spectators should not be admitted to the telescopic stands for subsequent events until the client is satisfied that the structure has been opened and set in accordance with the manufacturer instructions.

The numbers and distribution of spectators for which a grandstand has been designed should not be exceeded and consideration should be given to the access and egress arrangements. During all events a sufficient number of stewards should be present in order to safeguard spectators.

Table A.1 - Document checklist

Document Checklist

Document Prepared by


Requirements for spectator accommodation Client
Regulatory requirements Client
Technical requirements (including loading) Client


Indoor use, allowable floor loading Client
Required superimposed loading on stand Client


Evidence of competence Manufacturer
Detailed design drawings, calculations and structural limitations Manufacturer
Relevant information pertaining to standards, codes and software Manufacturer
Design risk assessment Manufacturer
Confirmation of independent design check Manufacturer


Evidence of competence Manufacturer
Manufacture records of structural components Manufacturer
Installation method statements Manufacturer
Risk assessment for installation Manufacturer
Confirmation of independent installation check Client


Completion certificate Manufacturer
User/Operational Manual Manufacturer


Starena reserves the right to alter or amend its specifications without notice.

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