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How to Assess BCA Performance Requirements for Multi-Storey Buildings.

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Basic BCA Performance Requirements and Provisions for Multi-Storey Buildings.

The BCA is designed to ensure that:

  • each unit (known as ‘sole occupancy unit’) will be unaffected by a fire in adjoining unit, building or property;
  • everyone in the building can safely get out of the building in the event of a fire;
  • you install all the right fire safety systems such as hose reels and sprinklers; and
  • some units are accessible to people with disabilities.

The list below includes some of the key considerations (however this is NOT an exhaustive list)

Fire Ratings

One critical aspect of building safety is fire rating requirements, which play a vital role in preventing the spread of fires and minimizing damage.

Understanding Fire Ratings

Fire ratings refer to the ability of a building component or assembly to resist the spread of fire for a specified period. This is typically measured in hours, with higher ratings indicating greater resistance to fire. Fire ratings are essential in multi-story commercial buildings, as they help to:

Contain fires: By using fire-resistant materials and assemblies, fires can be contained within a specific area, reducing the risk of spread and minimizing damage.

Provide safe evacuation routes: Fire ratings ensure that occupants have sufficient time to evacuate the building in the event of a fire, reducing the risk of injury or loss of life.

Protect property: Fire ratings help to minimize damage to the building and its contents, reducing the financial impact of a fire.

Key Fire Rating Requirements

Fire-Resistant Barriers: Fire-resistant barriers, such as gypsum board or fire-resistant glazing, are required to separate occupancies, corridors, and stairwells. These barriers must have a minimum fire-resistance rating of 1-2 hours, depending on the occupancy type and building height.

Fire-Stopping: Fire-stopping materials, such as sealants or sprays, are used to seal gaps and joints in fire-resistant barriers. These materials must be tested and rated for fire resistance, with a minimum rating of 1 hour.

Fire-Resistant Materials: Fire-resistant materials, such as fire-treated wood or fire-resistant roofing, are required for exterior walls, roofs, and structural elements. These materials must meet specific fire-resistance ratings, depending on the building's height and occupancy type.

Fire-Resistant Assemblies: Fire-resistant assemblies, such as fire-resistant doors and frames, are required for corridors, stairwells, and occupancies. These assemblies must meet specific fire-resistance ratings, depending on the building's height and occupancy type.

Compliance and Enforcement

Building owners, architects, and contractors must ensure compliance with fire rating requirements to avoid costly fines, legal liabilities, and reputational damage. To ensure compliance, it is essential to:

Consult with fire safety experts: Engage with fire safety experts to ensure that fire rating requirements are met and that the building design and materials comply with relevant codes and regulations.

Conduct regular inspections: Regular inspections can help identify potential fire hazards and ensure that fire rating requirements are maintained.

Maintain records: Keep accurate records of fire rating certifications, testing, and inspections to demonstrate compliance with regulatory requirements.

Fire rating requirements are a critical aspect of ensuring the safety of occupants in multi-story commercial buildings. By understanding the regulatory framework, key fire rating requirements, and compliance measures, building owners, architects, and contractors can ensure that their buildings meet the necessary standards.

Fire Rating & Safety Checklist

  • the manufacturers’ technical information tells you the FRL or fire resistance of their products;
  • walls on boundaries between properties and between different classes of buildings are always fire rated;
  • every gap or hole in a wall, floor or around a penetration, must be sealed with a fire rated sealant;
  • the entry door must be fire rated and have a self closer fitted;

  • the maximum gap under a fire door is 10mm;
  • doors into and out of fire stairs should open in the direction of travel; and
  • all air conditioning and ventilation ducts must have a fire damper at any fire rated wall.
  • Always consult with fire safety experts

Stairs

Stairs are a critical component of commercial buildings, providing a means of vertical transportation for occupants. In Australia, the design, construction, and maintenance of stairs in commercial buildings are governed by a range of standards and regulations aimed at ensuring safety and accessibility.

Australian Standards

The primary Australian standard governing stairs in commercial buildings is AS 1657:2018, "Fixed platforms, walkways, stairways and ladders - Design, construction and installation". This standard provides detailed requirements for the design, construction, and installation of stairs, including:

Stair geometry: The standard specifies minimum and maximum dimensions for stair treads, risers, and landings, as well as requirements for stair pitch and headroom.

Handrails and balustrades: The standard requires handrails and balustrades to be installed on stairs, with specific requirements for height, material, and design.

Tread and riser dimensions: The standard specifies minimum and maximum dimensions for tread and riser dimensions, as well as requirements for nosing and overhang.

Landings and platforms: The standard requires landings and platforms to be provided at specific intervals, with minimum dimensions and requirements for guarding.

The Building Code of Australia

(BCA) is a national code that sets out the minimum requirements for the design, construction, and maintenance of buildings, including stairs. The BCA requires stairs in commercial buildings to comply with AS 1657:2018, as well as additional requirements, including:

Fire-resistance: Stairs must be designed and constructed to resist the spread of fire, with requirements for fire-resistant materials and fire-stopping.

Accessibility: Stairs must be designed and constructed to provide safe and accessible passage for all occupants, including people with disabilities.

Emergency egress: Stairs must be designed and constructed to provide a safe means of emergency egress, with requirements for exit signs, emergency lighting, and clear paths.

The Disability Discrimination Act

(DDA) requires commercial buildings to provide accessible facilities, including stairs, for people with disabilities. The DDA requires stairs to be designed and constructed to meet specific accessibility standards, including:

Ramps and landings: Ramps and landings must be provided to facilitate access for people with mobility impairments.

Handrails and grabrails: Handrails and grabrails must be installed to assist people with mobility impairments.

Tactile indicators: Tactile indicators must be installed to assist people with visual impairments.

Compliance and Enforcement

Building owners, architects, and contractors must ensure compliance with Australian standards and requirements for stairs in commercial buildings to avoid costly fines, legal liabilities, and reputational damage. To ensure compliance, it is essential to:

Consult with experts: Engage with experts in stair design and construction to ensure that stairs meet the necessary standards and requirements.

Conduct regular inspections: Regular inspections can help identify potential hazards and ensure that stairs remain compliant with standards and requirements.

Maintain records: Keep accurate records of stair design, construction, and maintenance to demonstrate compliance with regulatory requirements.

The design, construction, and maintenance of stairs in commercial buildings are critical to ensuring the safety and accessibility of occupants. By understanding and complying with Australian standards and requirements, building owners, architects, and contractors can ensure that their stairs meet the necessary standards, reducing the risk of accidents, injuries, and legal liabilities.

Stair Checklist

  • must not have more than 18 risers and not less than two;
  • balustrades must be at least 865mm above stair nosing (at least one metre in landings and balconies); and
  • risers must not exceed 190mm (minimum 115mm) and treads not more than 355mm (minimum 250mm).

Paths of Travel

Australian Standards

The primary Australian standard governing paths of travel in commercial buildings is AS 1428.1:2009, "Design for access and mobility - General requirements for access - New building work". This standard provides detailed requirements for the design, construction, and installation of paths of travel, including:

Clear paths: The standard requires clear paths of travel to be provided, free from obstacles and hazards, with a minimum width of 1000mm.

Ramps and landings: The standard specifies requirements for ramps and landings, including maximum gradients, minimum landings, and handrail requirements.

Stairways: The standard requires stairways to be designed and constructed to meet specific requirements, including minimum tread and riser dimensions, handrail requirements, and nosing and overhang requirements.

Doorways and doors: The standard specifies requirements for doorways and doors, including minimum widths, clear openings, and door hardware.

Building Code of Australia (BCA)

The Building Code of Australia (BCA) is a national code that sets out the minimum requirements for the design, construction, and maintenance of buildings, including paths of travel. The BCA requires paths of travel in commercial buildings to comply with AS 1428.1:2009, as well as additional requirements, including:

Fire-resistance: Paths of travel must be designed and constructed to resist the spread of fire, with requirements for fire-resistant materials and fire-stopping.

Emergency egress: Paths of travel must be designed and constructed to provide a safe means of emergency egress, with requirements for exit signs, emergency lighting, and clear paths.

Accessibility: Paths of travel must be designed and constructed to provide safe and accessible passage for all occupants, including people with disabilities.

Disability Discrimination Act (DDA)

The Disability Discrimination Act (DDA) requires commercial buildings to provide accessible facilities, including paths of travel, for people with disabilities. The DDA requires paths of travel to be designed and constructed to meet specific accessibility standards, including:

Continuous accessible paths: Paths of travel must be continuous and unobstructed, with a minimum width of 1000mm.

Ramps and landings: Ramps and landings must be provided to facilitate access for people with mobility impairments.

Tactile indicators: Tactile indicators must be installed to assist people with visual impairments.

Compliance and Enforcement

Building owners, architects, and contractors must ensure compliance with Australian standards and requirements for paths of travel in commercial buildings to avoid costly fines, legal liabilities, and reputational damage. To ensure compliance, it is essential to:

Consult with experts: Engage with experts in accessibility and mobility to ensure that paths of travel meet the necessary standards and requirements.

Conduct regular inspections: Regular inspections can help identify potential hazards and ensure that paths of travel remain compliant with standards and requirements.

Maintain records: Keep accurate records of path of travel design, construction, and maintenance to demonstrate compliance with regulatory requirements.

The design, construction, and maintenance of paths of travel in commercial buildings are critical to ensuring the safe and accessible passage of occupants. By understanding and complying with Australian standards and requirements, building owners, architects, and contractors can ensure that their paths of travel meet the necessary standards, reducing the risk of accidents, injuries, and legal liabilities.

Paths of Travel Checklist

  • at least one metre wide;
  • at least two metres high;
  • have no trip points in floor;
  • contain no stored goods;
  • contain no combustible materials; and
  • must have emergency lights and signs.

Other Requirements to Consider

Smoke alarm and/or detection system

  • within unit in public corridors & spaces

Exit signs & lighting

  • all paths of travel,
  • all fire stairs.

Penetrations

  • fire rated collars or sealants.

Openings

  • protect if close to boundary.

Electrical equipment

  • non-combustible lined door,
  • self-closing fire door in some areas.

Extinguishers

  • Class A fire risks

Hydrants

  • if floor area exceeds 500 square metres.

Ducts

  • fire rated dampers at fire rated floors or walls

Top of walls

  • fire rated sealant to underside of roofs.

Fire doors

  • frame & door tagged,
  • self closing 10mm max.

Hose reels

  • if hydrants installed.
  • if no hydrants if fire compartment exceeds 500m2
  • adjacent to hydrant - within 4m of exit.

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