SRP Whisperwall: Efficient Noise Control Trusted by Industry Leaders for 10 Years

The use of Steel Rollformed Products' industry-leading acoustic stud, specialised clips for battens and strapping, and the aid of an experienced technical team have proved to be invaluable on many multi-storey building projects throughout New Zealand and Australia.

SRP acoustic products include:

Whisperwall resilient stud
Acoustic direct fix clips
ST001 clips
SRP Stud and Battens are compatible with GIB Noise Control systems

SRP's acoustic stud ‘Whisperwall’ is a single resilient stud, measuring 92mm wide that can achieve an STC62 at the highest configuration (10mm + 13mm GIB linings per side), giving an overall finished wall width of 138mm. This solution is widely used in commercial and multi-storey residential builds such as OKLA Apartments in Albany, Auckland. For this project, the initial design used Double Stud and Staggered Stud walls for their internal partitions. To help save on cost and installation time while maintaining the desired STC levels, SRP suggested the use of Whisperwall which was taken up by the architects.

Where a higher STC is required, such as the inter-tenancy walls in the Antipodean Apartments on Auckland's waterfront, SRP liaised with Marshall Day Acoustic Engineers to reach an STC65 rating using 92mm double stud wall with special high-density insulation with double linings on each side. SRP also has a range of clips to mitigate sound transmission for various systems like wall strapping, suspended ceiling systems, and direct fix clips.

SRP's technical team was engaged to help assist in coming up with a solution for a project where larger ceilings in an apartment building were unable to use any rigid bracing due to a car park being above a floor of apartments, and the vibrations caused by the movement of cars above would transfer too much sound through the rigid K-bracing. With the engineer's input SRP was able to develop a ‘Stud Bridge Ceiling’ that used slotted deflection head track as perimeter channel and studs as ceiling battens. The slotted track used as a perimeter channel, allowed the studs to be screwed off into the track while also being able to maintain movement in that joint without ‘popping out’ a seismic event. This could achieve a span of 3.4m and could be extended out further if need be with the use of a wire hanger and custom suspension clip at the midspan.

SRP remains NZ owned and operated and are committed to providing high performance, high-value acoustic products to the New Zealand construction industry. With the 3-5 day lead time, SRP remains the favourite of contractors and construction companies throughout the nation.

SRP Whisperwall Acoustic Stud Wall Systems

Steel Rollformed Products

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Steel Rollformed Products offer three Acoustic Wall Systems: Double Steel SRP Stud Walls, SRP Whisperwall, and, Staggered Steel SRP Stud Walls to provide acoustic and fire rating performance for interior and intertenancy walls.

Whisperwall:

Developed to provide superior acoustic properties with additional fire rated properties
Interior wall construction

Double Steel:

Generally used where two way FRR (Fire Resistance Rating), or superior acoustic performance is required
Mainly intertenancy walls and corridors

Staggered Stud:

Commonly used to provide effective resistance to sound transmission and acoustic impact
Two way FRR

This is to certify that SRP Wall Products and associated componentry supplied by Steel Rollformed Products Ltd are designed to, and manufactured from, a compliant base material, to the relevant New Zealand / International Standards and to the relevant parts of the New Zealand Building Code.

In addition, all wall profiles manufactured by SRP meet the required BMT [Base Metal Thickness], strength and durability requirements. All wall component sizes and gauges manufactured by SRP are to precise specified requirements as established by design, and will not compromise structural integrity and/or fire/acoustic ratings of a relevant non-load bearing partition.

In particular SRP products are compliant as a minimum, with the following Codes, Standards and any referenced third party materials noted in this SRP Product Catalogue is current at the time of publication:

AS/NZS 4600 Cold-formed steel structures
Galvanised Coating Z275 to AS/NZS 1397
NZS 3404 Steel Structures Standard
NZS 3404.1 Steel Structures Standard — Materials, fabrication, and construction
AS/NZS 1397 Steel sheet and strip
AS/NZS 1170 Structural design actions
NZBC — B1/VM1 and B2

SRP Ceiling Systems

Steel Rollformed Products

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Steel Rollformed Products' Ceiling Systems are available as Direct Fix, Top Cross Rail or Strongback options.

SRP Ceiling systems are suitable for use for internal ceilings and also external soffits. All SRP Ceiling Systems can be used to provide a base grid to fix GIB plasterboard, and to be the batten system in GIB Plasterboard Systems.

The selection of an SRP systems is determined by space requirements of the plenum vs internal room height.

Direct Fix: provides less room between ceiling structure and plasterboard and is suitable for houses, apartments, and offices where plenum space is not required, combines with 16mm or 28mm Batten
Strongback allows for suspended ceilings are are suitable for commercial spaces where rigidity and plenum space for services is required, combines with 22mm Batten and furring strap. Another option is to use the SRP 35mm Ceiling Batten with SRP Clipfix Clip.
TCR also allows for suspended ceilings and can be used with the 16mm or 28mm batten for use in for larger spaces.
SRP battens can also be used for Wall Strapping — with SRP Adjustable Wall Fix Clips (Please refer SRP Clips Spacing Tables for options).

NZBC Clause B2 — Durability: When installed in accordance with the installation instructions and in dry interior environments, SRP Ceiling Systems will satisfy the requirements of NZBC Clause B2 – Durability. SRP Ceiling Systems are manufactured from galvanised coated steel Z275 conforming to AS/NZS 1397.

NZBC Clause B1
NZBC Clauses C3 — Fire and G6 — Noise Control: SRP Ceiling Systems meet the requirements of specific fire and acoustic systems. Where installed ceilings form part of a specific fire or sound rated system the plasterboard manufacturer’s specification must be followed. Refer to GIB Fire Rated Systems and GIB Noise Control Systems.

SRP galvanised steel products are manufactured to meet the requirements of NZS 3404 Steel Structures Standard, NZs 404.1 Steel Structures Standard – Materials, Fabrication and Construction and AS/NZS 1397 Steel Sheet and Strip.

Other relevant standards:

NZS 4600 cold-formed Steel Structures
NZS 2785 Suspended Ceilings
NZS 1170 Structural Design Actions

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