Frequently Asked Questions

To keep things simple, we have sorted the questions under different topics. If you don’t find the answer in one section, try another similar one.

Door Furniture

Why use Trio Fire Rated Product ?

  • The Trio fire rated range has been tested to Australian / New Zealand Standard 1905, Part 1 – 2005 and BS 476: Part 22 – 1987 and has a 2 hour passed rating.
  • Trio’s reputation and success has been based on delivering the highest level of quality products for the past 40 years.
  • Suitable to suit all fire door sizes and designs.
  • The Trio designs suit commercial applications, where maximum application durability is required, while also providing stylish designs.
  • Available in Retail and Trade packaging to accommodate different market users.

What is a combination lock & lever set?

A combination set contains a passage set to open and close the door plus a double cylinder deadbolt to ensure the door can be deadlocked when required.

Note: The Chesapeake/Everest/ Tahoe & Builderlock combination sets are supplied with an entrance set and a double cylinder deadbolt.

When is a privacy set used?

A privacy set is normally used on bathrooms, toilets and powder rooms. Sometimes it is also used on bedroom doors. The door is locked or unlocked from the inside with a turn snib/button and there is an emergency release on the outside which will allow the door to be unlocked in case of emergency.

What is a double cylinder deadbolt?

A double cylinder deadbolt is operated by a key from either the inside or outside and when locked the door is locked from both sides.

What is Fire Rated?

To achieve maximum integrity of a fire door, the door furniture must withstand extreme heat conditions without fail. The Trio range has passed a 2 hour fire rating.

When is Fire Rated Used?

The Building Code of Australia requires that new commercial building construction have fire rating measures in place (either passive or active) to prevent the spread of flames and to minimise structural damage.

When is an entrance set used?

An Entrance set is normally used to secure an external door where a passage set function is required when the door is not locked.

The door is locked or unlocked externally by the key and internally by the turn snib/button.

When is a passage set used?

A passage set is always unlocked and can be operated from either inside or outside at all times.

What is a dummy set?

A dummy lever/knob is a fixed lever/ knob that is used on cupboards to match the rest of the door furniture.

What is a single cylinder and turn deadbolt?

A single cylinder and turn deadbolt allows the door to be locked with
a turn snib from the inside and with a key from the outside.

Note: The standard backset is 60mm however the pressed metal door furniture and the deadbolts have an adjustable latch (60mm – 70mm).


How do I get my door to open to 180 degrees?

Use a broad butt hinge where the throw of the selected hinge is sufficient to pivot the door around the frame and architrave.

How do I determine the handling of a hinge when using a lift off hinge?

Hold the hinge leaf with the pin in your hand and lift the other leaf off (see diagram on next page).

In a Retail store how can I tell the type of hinge from the colour packaging?

Refer to our icon and colour coding guide at the front of the catalogue with full explanations.

What is a split hinge and when is it used?

When two styles of hinges are combined either in size or style. A split hinge may be where one side of the hinge is screw fix, where the other is weld fix. Alternately it could be when a hinge has half the leaf of a 100 x 75mm hinge and the other half is 100 x 100mm leaf hinge. Split hinges are commonly used for customised jobs or even OEM.

My builder says my screw pattern is imperial and not metric?

The illustration below shows the difference in screw patterns. If the installer chooses not install a modern hole style hinge patter (metric) they will need to have specially made hinges to suit the original hole patter.

What does an anti-ligature hinge do?

This particular type of hinges are designed to eliminate points where a cord, rope, or other items can be looped or tied to a fixture in order to create a strangulation point, which may result in self harm or in extreme cases, loss of life.

When should I specify a Hospital Hinge?

Hospital hinges should be used when looking to maximize the total open width of a door (double door) way or aisle.

What is the difference between a flat and kinked Hirline hinge?

Please refer to illustrations below. The choice in using a flat or kinked hinge is dependant on the installer and the application it is required for. Kinked are more common to use.

When should I consider a 316 Stainless Steel hinge?

In an application where the hinge will be exposed in extremely corrosive environments.

When and with what should I lubricate my hinges?

When the operation of a hinge is squeaking or not opening as smooth it is recommended to use graphite or a silicon/teflon based lubricant.

Metal Stair Stringers

How to plan your Stair Stringers

  1. Check with your local council regarding any compliance requirements. It is recommended that a structural engineer also be consulted.
  2. Calculate the number of steps required. Measure the vertical height from the finished level of the landing to the ground. Divide the height by 175, round off to the nearest whole number and subtract 1.

    For example: H = 500 ÷ 175 = 2.85 (3) – 1 = 2 step stringer.

How to construct the Stair Stringer

Note: The stringers are engineered to provide arise height of 175mm and accommodate treads of 250mm in depth and up to 1000mm in width.

Minimum tread thickness should be 50mm.

  1. To determine how far from the vertical surface the stringer will protrude, multiply the number of steps by 250 and then minus 175. This will give you the centre point of the stringer foot (base) to concrete it in place (see A in diagram for calculation).

  2. Position the top mounting bracket of one stringer on the vertical support so that the height difference between the top of the landing and the top of the tread to be used is 175mm (see B in diagram). Mark out bolt positions, drill holes and bolt bracket onto support. Repeat procedure to position the second stringer. Be mindful that the maximum tread width must not exceed 1000mm.

  3. Concrete each stringer post into position. NB: To comply with the current Building Code of Australia, the stringer rise must be consistent, including the first step and last step up to the landing. The ground level may need to be built up or excavated to achieve this. Allow concrete to fully set before fixing treads into position.

What will I need?

  1. One set of stair stringers, size as determined by number of steps required.
  2. Four M12 bolts and nuts (or choose a fixing applicable to your job), length sufficient to cover the thickness of the top mounting bracket and vertical support to which the mounting brackets will be fixed.
  3. Concrete mix.
  4. The following tools:
    • Shovel
    • Tape measure and pencil
    • Level and string line
    • Power drill and 13mm drill bit
Retaining Wall Posts

Why use HARDAZ Retaining Systems?

HARDAZ Retaining Systems provide a simple and easy solution for creating solid timber retaining walls.

Each retaining post ensures a tight and secure fit for each sleeper, with no packing or fastening required.

All HARDAZ Retaining Systems products are made from galvanised steel, to guarantee long-life durability and strength.

A recess in each post allows for adjustment to ensure you get the perfect fit every time and to compensate for future timber movement and shrinkage.

Our range suits both 50mm and 75mm wide sleepers and is versatile enough to build walls from one to five sleepers high.

How to build a Retaining Wall

Simply decide whether you need 50 or 75mm thick sleepers and the height of your wall.

Then choose which posts you require to finish the job.

How to plan a Retaining Wall

  1. Check with your local council regarding any compliance requirements. Where a large amount of earth is to be retained, it is recommended that an engineer be also consulted.
  2. Draw up on paper the desired retaining wall. Where possible use readily available sleeper lengths to avoid having to cut sleepers.

How to construct the Retaining Wall

  1. Clear the area and mark out the line of the wall using the string line.

  2. Dig out a channel so that the bottom sleeper can be embedded 100mm into the ground.

  3. Measure out and locate post positions. Dig the holes for the posts.

  4. Starting at one end of the wall, insert the appropriate post and concrete into position ensuring that it is at the required height and vertically level.

  5. Before moving onto the next post, place into position the intervening bottom sleeper. That will allow the next post to be better positioned. Using the string line and level ensure the post is horizontally and vertically level, then concrete into position. Repeat procedure for remaining posts.

What I need to create a Retaining Wall 

  1. Make a list of the number and size of sleepers required to cover the height of wall, also allow for the bottom sleeper to be embedded 100mm into the ground.
  2. Make a list of the number and type of posts required (see diagrams A & C). The height of posts should be double the height of the retaining wall, meaning that half of the post should be below ground level.
  3. In addition to the sleepers and posts, you will require quick-set concrete and the following tools:
    1. Shovel or post-hole digger;
    2. Tape measure;
    3. String line and level.
Wire Mesh

Why Choose HARDAZ Bird Netting?

• Ideal for small bird enclosures

• Perfect for good visibility into the aviary

while keeping out most vermin

• Durable and workable, therefore easy to work

with for many applications including craft use.

• Available in 5, 10 and 30m lengths

• Available in 60, 90 and 120cm heights

• 0.56mm wire diameter

• 13mm aperture

• Galvanised finish

Why Choose HARDAZ Chicken Netting?

• Suitable for chicken coops and poultry yards

• A popular and versatile mesh also suitable

for plant protection, trellis and craft use.

• Available in 5, 10 and 30m lengths

• Available in 60, 90 and 120cm heights

• 1.00mm woven steel wire diameter

• 50mm aperture size

• Galvanised finish

Why Choose HARDAZ Aviary Mesh?

• Ideal to house small and medium sized birds

• Perfect for good visibility into the aviary while keeping out most vermin

• Durable and workable, therefore easy to work with for many applications beyond bird housing.

• Available in 5, 10 and 30m lengths

• Available in 60, 90 and 120cm heights

• 0.7 and 1.24mm woven steel wire diameter

• 3 aperture sizes

FOR SMALL & MEDIUM BIRDS • Galvanised finish

Why Choose HARDAZ Garden Mesh?

• Protects green life

• Suitable for many other applications such as animal enclosures.

• Available in 5 and 10m lengths

• Available in 60, 90 and 120cm heights

• 1.24mm welded steel wire diameter

• 3 aperture sizes

• Galvanised finish

Why Choose HARDAZ Trellis Mesh?

• Ideal for climbing flowers and vegetables.

• Easy to mould and shape.

• Available in 5 and 10m lengths

• Available in 120cm height

• 1.05 and 2mm welded steel wire diameter

• 2 aperture sizes

• Galvanised finish

Why Choose HARDAZ Dog Fence Mesh?

• Suitable for medium sized dogs

• Ideal for keeping medium sized dogs enclosed within a boundary and away from gardens, yards etc.

• Suitable for other applications such as light duty fencing

• Graduated mesh deters smaller animals

• Available in 10 and 30m lengths

• Available in 120cm height

• 2.0mm woven steel wire diameter

• Incremental 75-150mm aperture size

• Galvanised finish

Why Choose HARDAZ Puppy Fence Mesh?

• Suitable for small sized dogs

• Ideal for keeping small sized dogs enclosed within a boundary and away from gardens, yards etc

• Suitable for other applications such as enclosing small animals

• Graduated mesh deters smaller animals

• Available in 10 and 30m lengths

• Available in 90cm height

• 2.0mm woven steel wire diameter

• Incremental 25-100mm aperture size

• Galvanised finish

Pool Safety

What are the rules for pools and spas in Western Australia?

Drowning is the most common cause of preventable death of children aged 0–5 years. Over the past five years, 16 toddlers have drowned in Western Australia. For every drowning death, it is estimated that 10 children are admitted to hospital following a near-drowning incident (160 children over the past five years).

In WA, domestic swimming pools are the most common site in which drowning for children aged 0–5 years occurs, with 94 per cent of drowning incidents at locations in and around the home. Of that 94 per cent, 31 per cent occurred at a relative or neighbour’s home.

These tragic incidents can be significantly reduced if we are all aware of the potential hazards of water in our everyday life, use simple prevention methods and learn the life saving skill of resuscitation.

There are specific laws in WA that mandate the installation of a safety barrier to enclose private swimming and spa pools.

The laws are intended to protect the safety of young children by restricting their access to the area containing the swimming or spa pool.

What are the rules for pools and spas in Victoria?

All swimming pools and spas with a depth of water more than 300 mm (referred to as “pool” throughout this document) associated with Class 1, 2 and 3 buildings and a Class 4 part of a building, or a children’s service, must have safety barriers to restrict access by children under five years of age to the pool area.

What are the rules for pools and spas in Queensland?

For more specific information about pool safety requirements, contact your local council or a private building certifier.

To have your swimming pool fence inspected contact your local council.

Copies of Queensland building legislation can be obtained by visiting

These guidelines are not intended to be, and should not be relied upon as, the ultimate and complete source of information on swimming pool fencing.

Department of Infrastructure and Planning
Building Codes Queensland
PO Box 15009 City East Qld 4002 Australia
tel +61 7 3227 8548 free-call fax +61 7 3237 1248

What are the rules for pools and spas in the Northern Territory?

New pools and spas:

(installed after 1 January 2003) must be certified as complying with the Modified Australian Standard or the Non-Standard Safety Provision. The Australian Standards that are called up by the Swimming Pool Safety Regulations are AS 1926.1-1993 “Swimming Pool Safety Part 1: Fencing for swimming pools” and AS 1926.2-1995 “Swimming Pool Safety Part 2: Location of fencing for private swimming pools”.

What are the rules for pools and spas in Tasmania?

In Tasmania building permits are required and obtained from your local council for the installation of all swimming pools above and below ground where the maximum water surface area is greater than 9 metres and maximum water depth is greater than 300 millimetres. Swimming pools must provide child resistant safety fencing.

All access doors or gates are to be fitted with child-resistant self-closing and latching devices and where incorporating an external wall of a building, any doors and openable windows to the pool area should be fitted with self-closing and latching devices that are child-resistant.

Options for the location of pool safety fencing include isolating the swimming pool from all parts of the allotment, buildings and neighbouring allotments using an enclosure of safety fencing. Alternatively the pool can be isolated from other parts of the allotment, buildings and neighbouring allotments utilizing the existing boundary fencing and walls of buildings on the allotment provided there is no climbing points for access on the boundary fencing or access from the building to the pool area. If access is provided from the building to the pool area any access door and window opening to the pool area must be protected with child-resistant doorsets and child-resistant openable portions of window.

Swimming pool safety fencing should be designed and constructed so as to be non-climbable by young children having regard to the height of the fence, any horizontal climbable members, openings and footholds in the fence and the operation of self-closing and latching gates.

Additional requirements for swimming pools, which will effect design considerations and include provisions for drainage of swimming pools, water recirculation and inlet and outlet openings and skimmer boxes.

What are the rules for pools and spas in South Australia?

From 1 January 2014 amendments to the Development Regulations 2008 will require councils to inspect all new pools for compliance. Building Advisory Notice Council inspections of new swimming pools provides information explaining the new requirements.

Please contact the South Australian government for more information about the laws and regulations regarding pools.

What are the rules for pools and spas in ACT?

Fencing and other safety barriers for a swimming pool or spa that requires building approval and that is associated with a residential building must comply with the Building Code of Australia (BCA).

An outdoor pool area must not be accessible through a door, a pool gate is required, and a hinged door accessing an indoor pool area must swing away from the pool area.

ACT Government Environment and Sustainable Development Factsheet pools

What are the rules for pools and spas in NSW?

The Swimming Pools Act 1992 and its regulations work together with Australian Standard 1926 (AS1926) to establish the safety standards for ‘backyard’ swimming pools. These documents have been updated a number of times and, as a result, apply differently at different points in time.

The legislation can be found:

• Swimming Pools Act 1992

• Swimming Pools Regulation 2008

The Australian Standard (AS1926) is a document protected by copyright and cannot be reproduced here. Your local council should have a copy of the Standard available for viewing. The relevant versions of the Australian Standard are dated 1986, 2007 and 2012.

According to the Swimming Pools Act 1992, swimming pools must be surrounded by a Child- Resistant Barrier. It is the pool owner’s responsibility to ensure your swimming pool barrier is in good repair and good working condition.