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Technical Docs

SRP™ Plaster Angle

Steel Rollformed Products™ Ltd. [SRP™] produces external plaster angle bead in 90° and 135° angles with 30mm legs to use in internal walls. The product is perforated and rolled from continuous hot-dip galvanized GALVSTEEL® manufactured by New Zealand Steel, whenever possible.

There are 3mm diameter edge perforations at nominal 125mm centres to provide a securing point ensuring fastening will be below the troweling surface during installation. The stiff back rib provides both a troweling surface and a strengthened corner in service. The product is produced with an internal angle of less than 90° or 135° allowing the plaster compounds to key through the perforations achieving the 90° or 135° finished plastered angle. The angle is rolled true, during manufacturing, to aid the fastening and to assist in achieving straight clean corners [see FIGURE 34 below]. For easy transport, handling and storage, SRP™ Plaster Angles are supplied in boxed bundles. It is recommended that the boxed bundles be stored in a clean dry environment prior to installation. To enable good adhesion, the product should be wiped clean immediately prior to application of the plaster compound. SRP™ Plaster Angle is supplied in stock lengths of 2.4m, 2.7m, 3.0m and 3.6m.

Ceiling and Wall Connections

For Ceiling and Wall connections ensure all ceiling/wall connection details are installed as per required specification for the combination.

Wall Attachments

Attaching heavyweight and/or sound or vibration producing items [such as TV, speakers etc.] could compromise the acoustic and structural performance of the Standard SRP™ walls, SRP™ Whisperwall™ and SRP™ Acoustic walls. If this is unavoidable, contact SRP™ for specific design.

Control Joints

Control joints are designed to relieve the stresses imposed by structural movements, temperature fluctuation, change of humidity etc. The place and position of control joints is to be determined by design and is usually required at 9m centres in long continuous partitions. They are also required at the position of a control joint in the primary structure. Refer to GIB® Site Guide and to other relevant GIB® plasterboard documentation for position and construction of control joints.

Wall Strapping

A selection of SRP™ Battens and Clips are available for strapping of the walls. Contact SRP™ for more details.


SRP™ Studs/Tracks/Nogs will perform as specified, provided the design, specification, fabrication and erection procedures are in accordance with this document, relevant Standards and good trade practice. It is therefore critical that SRP™ Products be installed by a skilled tradesperson in accordance with all relevant Standards, Codes, Installation Instructions and common trade and building practices to achieve the required result and ensure quality workmanship. If any defects are found to the installed SRP™ Studs/ Tracks/Nogs, the relevant item must be removed and replaced prior to fastening of the wall linings.


SRP™’s Steel Stud and Track products are proudly New Zealand made. Our preference is to use GALVSTEEL® manufactured by New Zealand Steel, whenever possible. New Zealand Steel made GALVSTEEL® is backed by a 50 year Durability Statement to demonstrate compliance with NZBC Clause B2-Durability, when used and maintained as referred to in the current New Zealand Steel Durability Statement.

Delivery, Handling and Storage

Store in a dry flat area to avoid distortion and/or moisture damage. Exercise care and use appropriate safety equipment during installation.

SRP™ Steel products are not to be installed in a corrosive atmosphere, or come in direct contact with tanalised timber, copper or chemically treated materials. If it is unavoidable, a separation barrier between the galvanized SRP™ product and the potentially corrosive surface should be used. In addition, SRP™ recommends that SRP™ Steel Products not be installed before the building envelope is enclosed. SRP™ also recommends that all electrical wiring regulations must be strictly adhered to.

Store and install the partitions using SRP™ Steel Studs and Tracks in accordance with the New Zealand Steel GALVSTEEL® 50 year Durability Statement document.

Noted below are some additional relevant references and publications:

Plaster Angle

Download FIGURE 34

Fastening Handling and Maintenance


a. New Zealand Steel Limited, Specifiers and Builders Guide, and Installers Guide [refer for most current version].

b. NZ Metal Roof and Wall Cladding, Code of Practice, [refer for most current version and updates].

c. AS/NZS 2312:2002 [Incorporating Amendment No. 1] Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings.

d. Instructions and literature published by individual purlin and steel framing manufacturers.

e. NASH Handbook Best Practice for Design and Construction of Residential and Low-Rise Steel Framing [refer for most current version].

f. NASH N11 House Insulation Guide [refer for most current version].

Health & Safety

Although the composition of the SRP™ product is not a health hazard, all reasonable care should be taken to avoid injury from sharp edges or surface treatments. Appropriate training is required and protective clothing, hand and eyewear, as a minimum, should be worn during handling and installation, especially during cutting, drilling and securing of SRP™ products. Installation and use of powder actuated fastening to be in strict accordance with manufacturer’s specification and Health and Safety requirements. If in doubt, ask.


This SRP™ website is a guide to be used for standard non-load bearing partitions. Please consult the manufacturer for project specific design assistance relative to suitable wall types and heights/wind loadings for your project.

Click here to read more.

Additional Fastenings Handling and Design Requirements


a. Bottom plate details must ensure that the bottom plate remains dry in service and is not subject to water ingress from internal or external sources. Damp-proof course [DPC] must be used and be at least 10mm wider than the building element.

b. Separation methods as described within NZMRM Code of Practice 2.7 are required between any steel structural building element and incompatible materials which include, but are not limited to, timber treated with copper based preservatives, concrete, copper and other dissimilar metals and also materials which may be moisture bearing during the life of the building.

c. Site storage conditions must ensure that GALVSTEEL® is kept dry when in a stacked condition.

d. Prior to installation of external and internal lining GALVSTEEL® must be clean, dry, free of corrosion, clear of debris and swarf.

e. During storage and erection GALVSTEEL® should be kept as dry as possible and the building closed in as soon as practicable to limit exposure to the elements. As a guide, this should be within 3 weeks in marine or geothermal environments and within 12 weeks in moderate environments from the delivery of the GALVSTEEL® material to site.

f. GALVSTEEL® must be carried and not dragged when being moved. g. GALVSTEEL® must not be exposed to spatter from any welding activities.

h. Wall wraps and roof underlays must comply with the requirements of NZ52295:2006 Pliable, permeable building underlays for use with steel framing.

For Delivery, Handling and Storage requirements of plasterboard and other products used in conjunction with SRP™ Steel Studs and Tracks, refer to relevant product manufacturer’s documentation.