The following information will provide designers and contractors with a “user friendly” method of installing Drywall steel stud walls and ceilings. The design tables have been formulated using recognised Australian, New Zealand and American Standards together with industry standards developed over the years and substantiated through laboratory testing.
Construction of partition, fire rated or sound rated walls ca be achieved using the House Factory stud and track components.


* Drywall framing has been used in commercial applications for over 50 years
* House Factory Drywall framing is approximately 20% of the weight of an equivalent size 110 mm single brick rendered wall
* Drywall construction eliminates wet trades and allows earlier finishing of walls.
* Large quantities of metal components can be readily transported and craned into position on site.
* Drywall lined with plywood or plasterboard offer excellent sound transmission loss properties.
* House Factory manufactures studs in various gauges and sizes which allows walls up to 8 m in height to be constructed
* 0.55 and 0.75 bmt studs may be “boxed” to provide extra stregth at wall openings. These studs are covered by Australian Registration of Design no. 108166 and other manufacturers are therefore prohibited from reproducing profiled steel studs covered by this Design Registration.


Track sections provide a friction fit for the studs, which not only holds the studs in position until the building board is fitted, but also provides a slip joint to allow for any movement in the structure.
For this reason do not screw the building board to the track section unless specifically stated.

Wall Studs

The House Factory 0.50, 0.55 and 0.75 bmt wall studs have as standard 25mm bell mouthed service holes. Being bell mouthed with no protruding sharp edges eliminates the need for fitting grommets to electrical cabling
Punched round holes are processed at designated centres along the 1.15 and 1.50bmt studs.
Studs of 0.50, 0.55 and 0.75bmt may be bozed to provide greater rigidity at window and door opening, also at points where extra load carrying capacity is required – such as shelf loads.
Maximum wall height and ceiling span tables are in strict compliance with the Building Codes of Australia (BCA) Specification C1.8 “Structural Tests for Lightweight Construction”.


Noggings are designed to provide support to the wall studs and prvent twisting of the studs when fitting the liner boards. Noggings should be screwed, or crimped to both flanges of the studs

Building Board

Unless specifically schecked, framing should not exceed 600mm centres, and in higher wind loads this should be reduced according to building board manufacturers specified data. Sheets may be installed horizontally or vertically with joints in the liner boards being staggered between sides of the framing.
The building boards should be fitted to the framing using adjustable automatic clutch and depth control screw guns. For best screwing results, the screwing gun speed should be set to 2000 rpm.

Window and Door Framing

Window and door framing require special detailing to prevent long term serviceability problems. Typically, track sections can be cut and fabricated to frame window and door openings.
Studs adjacent to window and door openings should be boxed and screw fastened or pop rivetted to the wall stud tracks and should not be taken through to the structural soffit. Allow approximately 100 mm each end of the track to facilitate a suitable connection.

Plumbing and Electrical Services

Copper or brass piping and fittings should be isolated from direct contact with the steel framing. This can be achieved by insulating the piping with neoprene sheeting or tape, or by lagging the pipe. Plastic grommets could also be used to isolate the pipe and prevent water hammer.
Electrical services can be run through the service holes of the 0.50, 0.55 and 0.75bmt studs without requiring grommets, due to the unique flaring of the service holes.

Steel Stud Ceiling Systems

Steel studs may be used as ceiling joists, especially in situations where it is difficult to install a suspended ceiling. Typical applications would be corridors, bathrooms or open roof areas.


The House Factory steel stud and track sections are manufactured from hot dipped zinc coated steel strip, in accordance with the following Australian Standards:

* AS 1397-1993 Steel Sheet and Strip

All design tabels and data contained here are in accordance with the following Australian, New Zealand and American Standards:

* AS 1538-1988 Cold Formed Steel Structures Code
* AISI Publication – 1983 Cold Formed Steel Design
* Building Code of Australia (BCA) Specification C1.8 – Structural Tests for Lightweight Construction
Complying with the NZ Building Act 1991.

NZ Building Regulations 1992 and NZ Building Code Handbook (B1: Structure General & B2: Durability

* House Factory stud wall Safe Axial and Face Loads are fully compatible with the Alternative Load Combination of NZS 4203:1984 and hence conform to NZBC B1.VM1: Clause 2.1.
* Design Basis deriving House Factory Stud wall loads conforms to AS 1538-1988 as required by NZS 3404: Part 1: Clause 1.1 (c) as means of complying with the NZBC Handbook B1

House Factory products have been quality assured by Lloyd’s to AS NZS ISO9002/AS3902


House Factory’s products are warranted to be free from defects in material and workmanship, and products found to be defective will be replaced and/or repaired, if installed in accordance with technical literature and standard guarantee details. This warranty is in addition to any rights the consumer may have at law.

All House Factory Building Services’ products are designed to satisfy Australian and New Zealand conditions.

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