5316SC
STEELFORMERS CEILING BATTEN SYSTEM
1
GENERAL

If you have pre-customised this work section using the "questions and answers" provided as part of the downloading process, it may be necessary to amend some clauses to suit the final project-specific version.

 

The section must still be checked and customised to suit the project being specified, by removing any other irrelevant details and adding project-specific details and selections.

 

This section relates to the manufacture, supply and installation of Steelformers Ceiling Batten System direct fixed ceiling batten system, comprising of:

Modify/expand this clause to suit requirements of this specification section.

This section refers to a concealed suspension furring channel system supporting screw-fixed flush-finished plasterboard or other sheet material.

For specific technical information contact Steelformers, refer to MANUFACTURER DOCUMENTS.

1.1
RELATED SECTIONS

Refer to 5113G GIB® PLASTERBOARD LININGS for stopping of plasterboard sheets.

Include cross references to other sections where these contain related work.

1.2
ABBREVIATIONS

The following abbreviations apply specifically to this section:

BMT

Base Metal Thickness

FRR

Fire resistance rating

NRC

Noise reduction coefficient

CAC

Ceiling attenuation class

Refer to general section 1232 INTERPRETATION & DEFINITIONS for abbreviations used throughout the specification.

Documents
1.3
DOCUMENTS

Refer to the general section 1233 REFERENCED DOCUMENTS. The following documents are specifically referred to in this section:

NZBC B1/VM1

Structure general

NZBC B2/AS1

Durability

AS/NZS 1170.0

Structural design actions - General principles

AS/NZS 1170.1

Structural design actions - Permanent, imposed and other actions

AS/NZS 1170.2

Structural design actions - Wind actions

NZS 1170.5

Structural design actions - Earthquake actions - New Zealand

AS 1397

Continuous hot-dip metallic coated steel sheet and strip - Coatings of zinc and zinc alloyed with aluminium and magnesium

AS/NZS 2588

Gypsum plasterboard

AS/NZS 2589

Gypsum linings - Application and finishing

AS/NZS 2785

Suspended ceilings - Design and installation

NZS 4219

Seismic performance of engineering systems in buildings

AS/NZS 4600:2005

Cold-formed steel structures

AS/NZS 4600:2005 Amendment 1 is cited by NZBC, but AS/NZS 4600:2018 has not at the time of writing been cited by NZBC. This section uses the 2005 Amendment 1 version as an Acceptable Solution; consult with the BCA as to their requirements if you want to use the 2018 version as an Alternative Solution.

Delete from the DOCUMENTS clause any document not cited. List any additional cited documents.
The following are related documents and if referred to in the work section need to be added to the list of DOCUMENTS.

BRANZ BU 369

Fitting tolerances

BRANZ BU 519

Fasteners selection

1.4
MANUFACTURER DOCUMENTS

Manufacturer and supplier documents relating to work in this section are:

 

Steelformers Ceiling Batten System Factsheet.

Steelformers Ceiling Batten System Installation Guide.

Technical and Installation Manual GIB® Fire Rated Systems 2012.

New Zealand Steel - Durability Statement, for GALVSTEEL®

BRANZ Appraisal 1143 (2020) - The Steelformers Ceiling Batten System.

List documents relating to this part of the work, i.e. technical product/system specifications, test reports, appraisals, certification, etc. Normally they will be referred to in the text by the abbreviated title.

 

Manufacturer/supplier contact details

Company:

Taranaki Steelformers Limited

Web:

www.steelformers.co.nz

Email:

NPOffice@steelformers.co.nz

Telephone:

0800 655 142 (Head Office)

It is important to ensure that all personnel on site have access to accurate, up to date technical information on the many products, materials and equipment used on a project.  In most cases individual products are not used in isolation, but form part of a building process. Also a particular manufacturer and/or supplier requirements for handling, storage, preparation, installation, finishing and protection of their product can vary from what might be considered the norm. Access to technical information can help overcome this potential problem.

Warranties - Steelformers ceiling batten
1.5
WARRANTY - MANUFACTURER/SUPPLIER

Provide a material manufacturer/supplier warranty:

15 years

For Steelformers branded products against defects in materials under normal use.

 

  • Provide this warranty on the manufacturer/supplier standard form (if not available then use the standard form in the general section 1237WA WARRANTY AGREEMENT)
  • Commence the warranty from the date of practical completion of the contract works.

 

Refer to the general section 1237 WARRANTIES for additional requirements.

~ years to ~ years are the sort of warranty periods that can be expected depending on material selection and project conditions.  Check with the manufacturer/supplier for their specific periods.

Requirements
1.6
QUALIFICATIONS

Refer to 1270 CONSTRUCTION for requirements relating to qualifications.

Work to be completed by, or under the supervision of, a Licensed Building Practitioner (with the relevant license class), competent and familiar with the materials and techniques specified.

1.7
NO SUBSTITUTIONS

Substitutions are not permitted to any of the specified systems, components and associated products listed in this section.

1.8
SHOP DRAWINGS

Refer to the general section 1235 SHOP DRAWINGS for the requirements for submission and review and the provision of final shop drawings.

 

Provide shop drawings to show the general arrangement including, but not be limited to:

  • Deadload design calculations.
  • Fully dimensioned elevations of all elements
  • Complete details of construction, connections and all support systems
  • Dimensions of all typical elements
  • Jointing details and method of fixing between individual elements and between this installation and adjacent work
  • Provision for thermal movement
  • Bracing requirements, due to wind and seismic loads (indicate any design and construction work by others, to meet these requirements)
  • Sequence of installation
  • Co-ordination requirements with other work
  • A full schedule of materials, finishes and componentry

The general section 1235 SHOP DRAWINGS describes the process of submission and review of shop drawings.  Use this clause to describe the specific requirements of what the required shop drawings are to include.

 

Steelformers offer an engineering design service, delivering project specific documentation prior to consent and tender as an alternative to the Shop Drawing process.

 

By contacting Steelformers through the Masterspec work section support function, the design service can be coordinated with this specification section and other consultant documentation.  Steelformers project specific documentation can be attached within the specification Contract Appendix.

 

Re-run the Q&A if required to obtain the Steelformers design service clause content.  Delete this clause if using the Steelformers design service.

1.9
SPECIFIC DESIGN DOCUMENTS

Refer to SELECTIONS for project specific design documentation facilitated by Steelformers, generally consisting of:

  • Deadload design calculations.
  • Dimensioned plans/elevations of elements
  • Details of construction, connections and support systems
  • Dimensions of all typical elements
  • Jointing details and method of fixing between individual elements and between this installation and adjacent work
  • Bracing requirements, due to wind and seismic loads (indicate any design and construction work by others, to meet these requirements)
  • A schedule of materials, finishes and componentry

Steelformers offer an engineering design service, delivering project specific documentation prior to consent and tender as an alternative to the Shop Drawing process.  A detailed wind and seismic report as part of the consultant supplied information may be required in order to undertake a design.

Compliance information
1.10
INFORMATION REQUIRED FOR CODE COMPLIANCE

Provide the following compliance documentation:

  • Manufacturer / supplier warranty.
  • Internal Steelformers engineered design - refer to SELECTIONS.
  • Producer Statement (PS1) - Design from supplier Chartered Engineer.
  • Producer Statement (PS3) - Construction from the applicator / installer.
  • Producer Statement (PS4) - Construction Review from an acceptable suitably qualified person.
  • Other information required by the BCA in the Building Consent Approval documents.

Producer Statement - Design (PS1) required from consultants to be engaged by the Contractor. May involve a fee, check with Steelformers.

A PS1 from an Chartered Engineer can be provided for a fee.  Steelformers are willing to facilitate this

Producer Statement - Construction (PS3) required from installers as a condition of carrying out this work.

Producer Statement - Construction Review (PS4) required from consultants to be engaged by the Contractor.

1.11
PRODUCER STATEMENT - DESIGN (PS1)

Refer to SELECTIONS for an independent Producer Statement - Design (PS1).

A PS1 from an Chartered Engineer can be provided for a fee.  Steelformers are willing to facilitate this process.

Performance

This clause is setting a standard of performance for design to be met by the contractor.

Specifiers should therefore consider adding a means of confirming (say by testing or certification) that the performance criteria will be, or has been met.

Ensure correct information is supplied in 1220 PROJECT.

Use the following clause whether specifying by performance or not.

1.12
LOADING CODE REQUIREMENT

To AS/NZS 2785, comply with the requirements of: AS/NZS 1170.0, AS/NZS 1170.1, AS/NZS 1170.2, NZS 1170.5, NZBC B1/VM1, as appropriate.

Load combinations are considered in accordance with AS/NZS 1170.0
In some seismic areas the connection details may not be valid.  Refer to Steelformers for advice.

1.13
CERTIFICATION

Provide:

  • Certificates and other evidence that the system complies with the standards of performance specified.
  • Producer Statements.
1.14
ENVIRONMENTAL REQUIREMENTS

To NZBC B2/AS1, Durability.
Refer to SELECTIONS

Performance - Wind (design by contractor)

This clause is setting a standard of performance for design to be met by the contractor.

Specifiers should therefore consider adding a means of confirming (say by testing or certification) that the performance criteria will be, or has been met.

Ensure correct information is supplied in 1220 PROJECT.

1.15
DESIGN PARAMETERS WIND - DESIGN BY CONTRACTOR

Design the installation to the wind pressure parameters of AS/NZS 1170.2.  Refer to general section 1220 PROJECT for general details.

Contact Steelformers for their internal engineering design service or to facilitate Producer Statement - Design (PS1) for code compliance documents.

Refer to SELECTIONS specific design performance requirements.

Obtain information from the project structural engineer.

Delete the clause if it does not apply and the contractor is not expected to design.

Steelformers Professional Design Manual references AS/NZS 1170.2.

Performance - Seismic (design by contractor)

This clause is setting a standard of performance for design to be met by the contractor.

Specifiers should therefore consider adding a means of confirming (say by testing or certification) that the performance criteria will be, or has been met.

Ensure correct information is supplied in 1220 PROJECT.

1.16
SEISMIC - SPECIFIC DESIGN

Design the system and its anchorages/fixings to resist the earthquake loads of the seismic zone in accordance with NZS 1170.5.  Refer to general section 1220 PROJECT for general details.  Contact Steelformers for their internal engineering design service or to facilitate Producer Statement - Design (PS1) for code compliance documents.
Refer to SELECTIONS specific design performance requirements.

Obtain information from the project structural engineer.

Delete the clause if it does not apply and the contractor is not expected to design.

Steelformers Professional Design Manual references NZS 1170.5.

2
PRODUCTS

Select the proprietary system to suit the brief. Use the PRODUCTS clauses to get the required fire rating and acoustic control. Use the EXECUTION clauses required for the selected system.

Use the SELECTIONS clauses for specific selections - brand, module, finish etc.

Materials
2.1
CEILING BATTEN SYSTEM - DIRECT FIX BATTENS

Manufactured by Steel Formers.  Framing components include C-Channel, and ceiling battens (22mm and 35mm).  Manufactured from 0.55mm BMT steel coil to AS/NZS 4600, cold rolled steel lipped channel sections from zinc coated steel strip to AS 1397, Grade G550 high tensile GALVSTEEL®, Z275, with a minimum yield strength of 550 Mpa.
Design to AS/NZS 2785

Steelformers ceiling battens can support ceilings linings weighing up to 25kg /m2.

Note - the nominal weight of a single layer of 13mm plasterboard is 12kg/m2.

GALVSTEEL® is manufactured by New Zealand Steel.

22mm and 35mm ceiling battens cut to required length [maximum length is 10m]. C-Channels are supplied in 6m lengths.

Steelformers Ceiling Batten System is not suitable for use in structural applications e.g. ceiling diaphragm, or as a component for FRR construction. Individual projects may require specialist detailing and development.  Technical assistance from Steelformers is available on request.  Check Steelformers data sheets and develop in conjunction with ceiling lining weights.

Expand this clause to describe project requirements.

Note - Consult a Registered Electrician for earthing requirements.

2.2
CEILING BATTEN SYSTEM - BATTEN CLIPS

Manufactured by Steel Formers.  Manufactured from pressed 0.95mm BMT galvanized steel to AS/NZS 4600, from zinc coated steel to AS 1397, Grade G550, Z275, with a minimum yield strength of 550 Mpa.

Design to AS/NZS 2785

The galvanized steel clips are sourced in New Plymouth.  Clips are fixed to the sides of timber ceiling joists, truss chords, or floor joists.  Individual projects may require specialist detailing and development.  Technical assistance from Steelformers is available on request.

Check Steelformers data sheets and develop in conjunction with ceiling lining weights. Expand this clause to describe project requirements.

Note - Consult a Registered Electrician for earthing requirements.

2.3
PLASTERBOARD SHEET

Plasterboard ceiling lining to AS/NZS 2588.

Modify or delete this clause if using other sheet materials.

Components
2.4
FASTENERS - DIRECT FIX

Steelformers Ceiling Batten System Design Handbook

Fixing types vary for direct-fixing into steel or timber.

3
EXECUTION
Conditions
3.1
DELIVERY, STORAGE & HANDLING OF PRODUCTS

Refer to 1270 CONSTRUCTION for requirements relating to delivery, storage and handling of products.

Use this standard generic clause and if appropriate add additional special requirements.

3.2
ROUTINE MATTERS

Refer to 1250 TEMPORARY WORKS & SERVICES for protection requirements.
Refer to 1270 CONSTRUCTION for requirements relating to defective or damaged work, removal of protection and cleaning.

Use this standard generic clause and if appropriate add additional special requirements.

3.3
SUBSTRATE

Ensure substrate is plumb, level and in true alignment. Do not start erection if the substrate will not allow work of the required standard. Complete any remedial work found necessary before framing erection.

3.4
CO-ORDINATE SERVICES

Co-ordinate and co-operate with electrical and mechanical work to avoid conflict between suspension members and luminaires, diffusers, pipework and ducting. Confirm the provision of extra hangers and fixings.
Services and other attachments, attached to the ceiling support system to AS/NZS 2785, ensure that:

  • items over 7.5kg and items under 7.5kg but falling greater than 3m, require a tether to AS/NZS 2785, anchored to structure.
  • items attached to the ceiling grid must be under 10kg mass, items over 10kg cannot be attached to the grid and must be independently supported.
  • unless designed otherwise, the ceiling systems total load of services and other attachments must not exceed 3kg/m².
  • light fittings installed to AS/NZS 2785 and NZS 4219.
  • ceiling system clearances to structure and services etc. that are not attached to the ceiling system, to be to NZS 4219, and/or NZS 4541 for sprinklers.

Direct fixed systems may be able to vary loads slightly from the above depending on fixing centres and lining capacity, discuss with manufacturer.  Also with direct-fixed systems, subject to design, small lightweight light fittings may be able to be fixed to; the lining (for recessed) or lining back support (for pendants).

3.5
SITE CONDITIONS

To AS/NZS 2785: Appendix C2, Site Conditions and time of installation; Appendix C4, Inspection.

3.6
RESPONSIBILITY

Ensure that conditions are suitable for the ceiling installation.  Arrange for the programming of the work to suit required practice.

Installation - Ceiling Batten System
3.7
STANDARDS AND TOLERANCES

Refer to the general section 1270 CONSTRUCTION for general requirements.

Amend this clause to describe specific standards and tolerances to be achieved in carrying out this part of the work.  Although such tolerances are typically included in standards (NZS, AS/NZS etc) in certain circumstances it is worth restating these in this clause.

3.8
INSTALLATION - GENERAL

Install the Ceiling Batten System to AS/NZS 2785 minimum standards and Steelformers requirements. Adjust all clips by laser level until they are all level.

 

Allowance for support members:

  • Space required by the loads on the system and the type of ceiling lining.
  • For the installation of services and accessories, including ductwork, light fittings and diffusers.
  • Additional back support or suspension members for the fixing of services and accessories to prevent distortion, overloading or excessive vertical deflection.
  • For access for maintenance of services.

 

If required, allow for notch grid members at the junction with the perimeter trim to make sure the ceiling lining lies flat on the perimeter trim.

Do not attach the suspension system to the lip or flange of purlins.

 

Fix, erect and fit to finish rigid, plumb, square and true to line and face.  Where components required cutting on site, use metal snips, fine-toothed band or hack saws.

 

Install all movement joints and seismic restraints where required.

 

Services support to conform to the following:

  • If the service has not been designed to accept the ceiling load, do not fix direct-fix clips to services (e.g. ductwork).
  • If services obstruct the ceiling supports, provide bridging on each side of the services.
  • Do not support services terminals on ceiling lining, unless specified.

Refer to CO-ORDINATE SERVICES for anchoring services to the ceiling structure.

3.9
INSTALLATION - SPECIFIC

Install the Ceiling Batten System to Steelformers project Specific Design documentation. Refer to SELECTIONS.

3.10
ACCESSIBILITY

Provide access to the ceiling system and the in-ceiling and above-ceiling services so that maintenance and removal of any part can be carried out without damage to the ceiling system or panels.

As full access in all areas is clearly impractical, any special requirements for clear access will need to be defined; either by description here, or on the drawings.

3.11
PENETRATIONS

To AS/NZS 2785 and NZS 4219 generally, with sprinkler systems to NZS 4219 and/or NZS 4541.
Accommodate recessed light fittings, air conditioning outlets and other electrical and/or mechanical services that are fixed to or pass through the ceiling system.  Provide independent support and/or required clearances for these as necessary.

Modify clause to suit project.

3.12
BULKHEADS

Form bulkheads to manufacturer requirements.  Diagonally brace at regular intervals to provide lateral stability.

Modify clause to suit project requirements.

Consult with Manufacturer for design advice.

3.13
PROTECT EXISTING WORK

Protect adjacent existing work from damage during the installation.

Installation - direct-fix, flush ceiling
3.14
FLUSH CEILING - DIRECT FIX

Install plasterboard sheets for finishing to AS/NZS 2589.  Screw-fix sheets to ceiling batten system at the centres required by the ceiling lining manufacturer.  Stagger joints and fully support on the ceiling batten system.

Modify clause to suit project requirements.

Refer to CO-ORDINATE SERVICES for anchoring services to the ceiling structure.

Completion
3.15
COMPLETION MATTERS

Refer to 1270 CONSTRUCTION for completion requirements and if required commissioning requirements.

Use this standard generic clause and if appropriate add additional special requirements.

4
SELECTIONS

For further details on selections, refer to Steelformers webpage listed in Manufacturer Details.

Substitutions are not permitted to the following, unless stated otherwise.

If substitutions are permitted modify the statement above, ensure the NO SUBSTITUTIONS clause from GENERAL is treated the same.

 

Select the options to suit the project and delete options not specified.

Design documentation
4.1
SPECIFIC DESIGN, BY STEELFORMERS

Document:

~

Submitted:

~

Available:

~

Document:

Identify Steelformers specific design documents

Submitted:

Building Consent, Tender (or both)

Available:

Specification Contract Appendix, or describe alternative

4.2
PRODUCER STATEMENT - DESIGN

PS1:

~

Available:

~

A PS1 from an independent engineer can be provided for a fee, a process facilitated by Steelformers.

PS1:

Identify the producer statement - design (PS1)

Available:

Specification Contract Appendix, or describe alternative

Performance

Use these clauses if specifying by performance.

4.3
ENVIRONMENTAL REQUIREMENT

Location:

Range

Relative Humidity

~

~ - ~°C

~  % maximum

If this clause is not used and the SITE CONDITIONS clause cannot be complied with, then allowance needs to be made for a tile that will not sag over the construction period.

Performance - Wind (design by contractor)
4.4
DESIGN PARAMETERS WIND - DESIGN BY CONTRACTOR

Wind design and performance criteria to AS/NZS 1170.2 as follows:

 

Parameter

Value

Design wind speed (Vdes.Ø)

~ m/s

Terrain Category (Mz,cat)

~

Shield Factor (Ms)

~

Topographic multiplier (Mt)

~

Hill-shape multiplier (Mh)

~

Lee multiplier (Mlee)

~

Internal pressure coefficient (Cp,i)

~

Fill in project values, obtain information from the project structural engineer.

These values come are critical to allow the Contractor to design the ceiling accurately

Usually design for wind is only required if there are opening external windows/doors or other sources of wind pressure differential (including some roof spaces).

Ensure that all other general information is available in this specification or on the drawings (for instance ceiling height etc.). Refer to AS/NZS 2785, Appendix B for further information required.

Delete the clause if it does not apply and the contractor is not expected to design.

Performance - Seismic (design by contractor)
4.5
DESIGN PARAMETERS SEISMIC - DESIGN BY CONTRACTOR

Seismic design and performance criteria to NZS 1170.5 as follows:

 

Parameter

Value

Building Importance Level

~

Design Working Life

~ years

Site Sub-soil Class

~

Near Fault Factor N(T,D)

~

Part Classification Category (P1-P7)

~

Interstorey Drift - ULS

~ mm

Interstorey Drift - SLS

~ mm

Fill in project values, obtain information from the project structural engineer.

These values are critical to allow the Contractor to design the ceiling accurately

Ensure that all other general information is available in this specification or on the drawings (for instance ceiling height etc.). Refer to AS/NZS 2785, Appendix B for further information required.

Delete the clause if it does not apply and the contractor is not expected to design.

Materials
4.6
CEILING BATTEN SYSTEM - DIRECT FIXED

Steelformers Ceiling Batten system.

Location:

~

Ceiling Batten:

~

C-Channel:

~

Earth Strapping:

~

Anchoring services, fixtures and fittings:

~

Options:

Ceiling Batten sizes:

22mm or 35mm

C-Channel:

Select if required

Earth strapping:

Consult a Registered Electrician for earthing requirements.

Anchoring services, fixtures and fittings:

Refer to CO-ORDINATE SERVICES for anchoring services to the ceiling structure.

4.7
PLASTERBOARD SHEET

Refer to 5113G GIB® PLASTERBOARD LININGS section for details of plaster board.

Screw fixings:

6g x 32mm Scavenger Head Gib Grabber Screw for single layer of specified plasterboard

Modify to suit lining required.