NCC 2016 Volume One
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SA Part G5 Construction in Bushfire Prone Areas

SA Part G5 Construction in Bushfire Prone Areas

Delete G5.1 and insert SA G5.1:

SA G5.1 Application of Part

The Deemed-to-Satisfy Provisions of this Part apply to—

(a)

a Class 2 or 3 building; or

(b)

a Class 10a building or deck located within 6 m of an associated Class 2 or 3 building that is required to comply with this Part,

located in a designated bushfire prone area.

Delete G5.2 and insert SA G5.2

SA G5.2 Bushfire attack levels

Where a siteis located in a designated bushfire prone area, the bushfire attack level that applies to the site is—

(a)

for areas identified as General Bushfire Risk areas in South Australian Development Plans, the BAL — Low bushfire attack level; and

(b)

for areas identified as Medium Bushfire Risk areas in South Australian Development Plans, the BAL — 12.5 bushfire attack level; and

(c)

for areas identified as High Bushfire Risk areas in South Australian Development Plans, the bushfire attack level assessed for the in accordance with AS 3959; and

(d)

for Excluded Areas within 500 m of a High Bushfire Risk area, as identified in South Australian Development Plans, the BAL — Low bushfire attack level; and

(e)

for Excluded Areas within 100 m of a High Bushfire Risk area, as identified in South Australian Development Plans, the bushfire attack level assessed for the site in accordance with AS 3959.

Add SA G5.3 as follows:

SA G5.3 Construction requirements

(a)

A Class 2 or 3 building, or a Class 10a building or deck required to comply with this Part, must be constructed in accordance with SA Table G5.1 for the bushfire attack level for the .

(b)

A Class 10a building or deck is not required to comply with SA G5.3(a) if it is separated from a Class 2 or 3 building by—

(i)

for a Class 10a building or deck attached to or sharing a common roof space with a Class 2 or 3 building, a wall that extends from the footings or concrete slab to the underside of a non-combustible roof covering and complies with one of the following:

(A)

The wall has an FRL of not less than 60/60/60 for loadbearing walls, and -/60/60 for non-loadbearing walls when tested from the Class 10 side; or

(B)

The wall is of masonry, earth wall or masonry-veneer construction where the masonry leaf is not less than 90 mm in thickness.

(ii)

for a Class 10a building or deck located below a Class 2 or 3 building, separating floor and/or wall construction that complies with one of the following:

(A)

The floor and/or wall has an FRL of not less than 60/60/60 for loadbearing construction, and -/60/60 for non-loadbearing construction when tested from the Class 10 side; or

(B)

Where part or all of the separating construction is a wall, the wall need not comply with (A) if it complies with SA G5.3(b)(i)(B).

(iii)

for a Class 10a building or deck located within 6 m of a Class 2 or 3 building, comply with SA G5.3(b)(i).

(c)

Openings in separating construction referred to in SA G5.3(b)(i) and (ii) must comply with the following:

(i)

Doorways must be protected by -/60/30 self-closing fire doors.

(ii)

Windows must be protected by -/60/- fire windows permanently fixed in the closed position.

(iii)

Other openings (excluding control and construction joints, subfloor vents, weepholes and penetrations for pipes and conduits) must be protected by construction with an FRL of not less than -/60/-.

(d)

For the purposes of SA Table G5.1 bushfire-resisting timber is timber that is in solid, laminated or reconstituted form that meets the criteria specified in Appendix F of AS 3959.

(e)

Where any material, element of construction or system satisfies the test criteria of either AS 1530.8.1, for BAL — 12.5, BAL — 19, BAL — 29 and BAL — 40 and AS 1530.8.2 for BAL — FZ it satisfies the requirements of that BAL.

(f)

If any material, element of construction or system satisfies the test criteria without screening for ember protection, the requirements for screening of openable parts of windows must still apply.

(g)

Polycarbonate may be used as roof sheeting for Class 10a buildings located within 6 m of a Class 2 or 3 building for BAL – Low, BAL – 12.5, BAL – 19 and BAL – 29 sites.

SA TABLE G5.1 CONSTRUCTION REQUIREMENTS FOR BAL — LOW, BAL — 12.5, BAL — 19, BAL — 29, BAL — 40 and BAL – FZ SITES

FLOOR SYSTEMS
1. BAL— Low

A flooring system must comply with one or a combination of the following:

  1. A concrete slab-on-ground.
  2. A suspended concrete floor.
  3. A framed floor where, if the underside is greater than 600 mm above finished ground or paving level, the subfloor space is enclosed with—
    1. a sheet material. If fibre reinforced cement sheets are used for this purpose, the sheets must have a minimum thickness of 6 mm; or
    2. a wall that extends around the perimeter of the floor from the underside of the lowest framing member to finished ground or paving level and is constructed in accordance with clauses 7.4.1 and 7.4.2 of the BAL — 29 requirements of AS 3959. Sarking-type material must have a Flammability Index of not more than 5; or
    3. a vertical non-combustible sheet material that extends around the perimeter of the floor from the underside of the lowest framing member to finished ground or paving level. If fibre reinforced cement sheets are used for this purpose, the sheets must have a minimum thickness of 6 mm.
  4. A framed floor where, if any joist and/or bearer is less than 600 mm above finished ground or paving level, the subfloor space is—
    1. if unenclosed, constructed from flooring materials, including bearers, joists and flooring that comply with clause 7.3.2.2 (a) and (b) of the BAL — 29 requirements of AS 3959; or
    2. enclosed with a wall complying with (c)(ii); or
    3. enclosed with non-combustible sheet material that extends not less than 400 mm above finished ground or paving level and to the bottom of the wall sheeting material. If fibre reinforced cement sheets are used for this purpose, the sheets must have a minimum thickness of 6 mm.

A flooring system complying with (c) or (d)(ii) or (iii) must have all of the joints in the external surface of walls covered, sealed, overlapped, backed or butt-jointed to prevent gaps greater than 3 mm. Alternatively, Sarking-type material can be applied over the frame prior to fixing any external sheeting.
2. BAL — 12.5

As per BAL — Low requirements of this table, with the following variation—

  1. Aluminium mesh or aluminium perforated sheet must not be used to enclose a subfloor space.
3. BAL — 19

As per BAL — Low requirements of this table, with the following variation—

  1. Aluminium mesh or aluminium perforated sheet must not be used to enclose a subfloor space.
4. BAL — 29

As per BAL — Low requirements of this table, with the following variation—

  1. Aluminium mesh or aluminium perforated sheet must not be used to enclose a subfloor space.
5. BAL — 40

A flooring system must comply with clause 8.3 of the BAL — 40 requirements of AS 3959 with the following variation—

  1. Where a wall is used to enclose the subfloor space, any required sarking-type material must have a Flammability Index of not more than 5.
  2. The subfloor space of a framed floor must not be enclosed with mesh or perforated sheet made from corrosion-resistant steel, bronze or aluminium.
6. BAL — FZ

A flooring system must comply with clause 9.3 of the BAL — FZ requirements of AS 3959 with the following variation—

  1. Where a wall is used to enclose the subfloor space, any required sarking-type material must have a Flammability Index of not more than 5. (b) The subfloor space of a framed floor must not be enclosed with mesh or perforated sheet made from corrosion-resistant steel, bronze or aluminium.
SUPPORTING POSTS, COLUMNS, STUMPS, PIERS AND POLES (except in subfloor spaces enclosed by aluminium mesh or aluminium perforated sheet as described in FLOORING SYSTEMS 1 BAL Low (d))
1. BAL — Low

Supporting posts, columns, stumps piers and poles must comply with one or a combination of the following:

  1. A non-combustible material.
  2. Bushfire-resisting timber for not less than 400 mm above finished ground or paving level.
  3. Timber mounted on metal stirrups with a clearance of not less than 75 mm above finished ground or paving level.
2. BAL — 12.5
As per BAL — Low requirements in this table.
3. BAL — 19
As per BAL — Low requirements in this table.
4. BAL — 29
Supporting posts, columns, stumps, piers and poles must comply with clause 7.2 of the BAL — 29 requirements of AS 3959.
5. BAL — 40
Supporting posts, columns, stumps, piers and poles must comply with clause 8.2 of the BAL — 40 requirements of AS 3959.
6. BAL — FZ
Supporting posts, columns, stumps, piers and poles must comply with clause 9.2 of the BAL — FZ requirements of AS 3959.
EXTERNAL WALLS
1. BAL — Low
No requirements.
2. BAL — 12.5

The exposed components of external walls must comply with one or a combination of the following:

  1. Clauses 7.4.1(a) and 7.4.2 of the BAL — 29 requirements of AS 3959 and any sarking-type material must have a Flammability Index of not more than 5.
  2. A timber or steel-framed wall that—
    1. is sarked on the outside of the frame with sarking-type material having a Flammability Index of not more than 5; and
    2. complies with clauses 5.4.1 and 5.4.2 of the BAL — 12.5 requirements of AS 3959.
3. BAL — 19

The exposed components of external walls must comply with one or a combination of the following:

  1. Clauses 7.4.1(a) and 7.4.2 of the BAL — 29 requirements of AS 3959 and any sarking-type material must have a Flammability Index of not more than 5.
  2. A timber or steel-framed wall that—
    1. is sarked on the outside of the frame with sarking-type material having a Flammability Index of not more than 5; and
    2. complies with clauses 6.4.1 and 6.4.2 of the BAL — 19 requirements of AS 3959.
4. BAL — 29
The exposed components of external walls must comply with clauses 7.4.1 and 7.4.2 of the BAL — 29 requirements of AS 3959 and any sarking-type material must have a Flammability Index of not more than 5.
5. BAL — 40
The exposed components of external walls must comply with clauses 8.4.1 and 8.4.2 of the BAL — 40 requirements of AS 3959 and any sarking-type material must have a Flammability Index of not more than 5.
6. BAL — FZ
The exposed components of external walls must comply with clauses 9.4.1 and 9.4.2 of the BAL — FZ requirements of AS 3959 and any sarking-type material must have a Flammability Index of not more than 5.
WINDOWS
1. BAL — Low
No requirements.
2. BAL — 12.5
Window assemblies, and shutters and screens where fitted, must comply with clauses 5.5.1, 5.5.1A and 5.5.2 of the BAL — 12.5 requirements of AS 3959.
3. BAL — 19

Window assemblies, and shutters and screens where fitted, must comply with clauses 6.5.1, 6.5.1A and 6.5.2 of the BAL — 19 requirements of AS 3959 with the following variations:

  1. Aluminium mesh must not be used in the window screens.
  2. Where leadlight windows are installed they must be protected by non-combustible shutters or toughened glass.
  3. Where timber is used, it must be bushfire-resisting timber.
4. BAL — 29

Window assemblies, and shutters and screens where fitted, must comply with clauses 7.5.1, 7.5.1A and 7.5.2(a) or (b)(i), (ii), (iii) and (v) of the BAL — 29 requirements of AS 3959 with the following variation:

  1. Aluminium mesh must not be used in the window screens.
5. BAL — 40
Window assemblies, and shutters and screens where fitted, must comply with clauses 8.5.1, 8.5.1A and 8.5.2 of the BAL — 40 requirements of AS 3959.
6. BAL — FZ
Window assemblies, and shutters and screens where fitted, must comply with clauses 9.5.1, 9.5.1A and 9.5.2 of the BAL — FZ requirements of AS 3959.

EXTERNAL

(including side-hung external doors such as French doors, panel fold and bi-fold doors, sliding doors and garage doors)

1. BAL — Low
No requirements.
2. BAL — 12.5
Doors and door frames, and shutters and screens, where fitted must comply with clauses 5.5.1, 5.5.1A and 5.5.3, 5.5.4 and 5.5.5 of the BAL — 12.5 requirements of AS 3959.
3. BAL — 19

Doors and door frames, and shutters and screens where fitted, must comply with clauses 6.5.1, 6.5.1A and 6.5.3, 6.5.4 and 6.5.5 of the BAL — 19 requirements of AS 3959, with the following variation:

  1. Aluminium mesh must not be used in the door screens.
4. BAL — 29

Doors and door frames, and shutters and screens where fitted, must comply with clauses 7.5.1, 7.5.1A and 7.5.3(a) or (b) or (c)(i)(A), (C) or (D), (ii), (iii), (iv), (v), (vi) and (vii), 7.5.4 and 7.5.5 of the BAL — 29 requirements of AS 3959, with the following variations:

  1. Aluminium mesh must not be used in the door screens.
  2. If shutters are used for side-hung or sliding doors, they must be non-combustible.
  3. Side-hung doors must be solid-core with a minimum thickness of 35 mm.
5. BAL — 40
Doors and door frames, and shutters and screens where fitted, must comply with clauses 8.5.1, 8.5.1A and 8.5.3(a) or (b)(i)(A), (ii), (iii), (v), (vii) and (viii), 8.5.4 and 8.5.5 of the BAL — 40 requirements of AS 3959.
6. BAL — FZ
Doors and door frames, and shutters and screens where fitted, must comply with clauses 9.5.1, 9.5.1A and 9.5.3, 9.5.4 and 9.5.5 of the BAL — FZ requirements of AS 3959.

VENTS AND WEEPHOLES

(including vents and weepholes located in esternal walls and subfloor spaces)

1. BAL — Low
Vents to subfloor spaces and weepholes must be fitted with ember guards made from corrosion-resistant steel, bronze or aluminium mesh or perforated sheet with a maximum aperture size of 2 mm.
2. BAL — 12.5
As per the BAL — Low requirements of this table.
3. BAL — 19

As per the BAL — Low requirements of this table with the following variation:

  1. Aluminium mesh or aluminium perforated sheet must not be used for the ember guards.
4. BAL — 29
As per the BAL — 19 requirements of this table.
5. BAL — 40
As per the BAL — 19 requirements of this table.
6. BAL — FZ
As per the BAL — 19 requirements of this table.

ROOFS

(including verandahs and attached carport roofs, eaves linings, fascias, gables)

1. BAL — Low
No requirements.
2. BAL — 12.5

Roofs must comply with clauses 5.6.1, 5.6.2, 5.6.3, 5.6.4 and 5.6.6 of the BAL — 12.5 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.
  2. Any sarking-type material must have a Flammability Index of not more than 5.
3. BAL — 19

Roofs must comply with clauses 6.6.1, 6.6.2, 6.6.3, 6.6.4 and 6.6.6 of the BAL — 19 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.\
  2. Any sarking-type material must have a Flammability Index of not more than 5.
  3. Fascias and bargeboards must be—
    1. non-combustible; or
    2. bushfire-resisting timber; or
    3. a combination of (i) and (ii).
  4. Timber eaves linings and joining strips in linings, fascias and gables must be of bushfire-resisting timber.
4. BAL — 29

Roofs must comply with clauses 7.6.1, 7.6.2, 7.6.3, 7.6.4 and 7.6.6 of the BAL — 29 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.
  2. Any sarking-type material must have a Flammability Index of not more than 5.
  3. Fascias and bargeboards must be—
    1. non-combustible; or
    2. bushfire-resisting timber; or
    3. a combination of (i) and (ii).
  4. Joining strips in linings, fascias and gables must be of bushfire-resisting timber.
  5. Fibre-reinforced cement or aluminium must not be used for roof sheeting or fascias.
  6. Aluminium must not be used for eaves linings.
5. BAL — 40

Roofs must comply with clauses 8.6.1, 8.6.2, 8.6.3, 8.6.4 and 8.6.6 of the BAL — 40 requirements of AS 3959 with the following variations:

  1. Sheet roofs (metal or fibre-cement sheet) must be fully sarked with a sarking-type material having a Flammability Index of not more than 5.
  2. Joining strips in eaves linings, fascias and gables must be of bushfire-resisting timber.
  3. Fibre-reinforced cement or aluminium must not be used for roof sheeting or fascias.
  4. Aluminium must not be used for eaves linings.
6. BAL — FZ

Roofs must comply with clauses 9.6.1, 9.6.2, 9.6.3 and 9.6.4 of the BAL — FZ requirements of AS 3959 with the following variation:

  1. Joining strips in eaves linings, fascias and gables must be of bushfire-resisting timber.

ROOF LIGHTS

(including vented Roof lights and skylights)

1. BAL — Low
No Requirements.
2. BAL — 12.5

Roof lights must comply with clause 5.6.5 of the BAL — 12.5 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or perforated sheet must not be used for screening purposes.
  2. Roof lights and associated shafts through the roof space must be sealed with a non-combustible sleeve or lining.
3. BAL — 19

Roof lights must comply with clause 6.6.5 of the BAL — 19 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or perforated sheet must not be used for screening purposes.
  2. Roof lights and associated shafts through the roof space must be sealed with a non-combustible sleeve or lining.
4. BAL — 29

Roof lights must comply with clause 7.6.5 of the BAL — 29 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or perforated sheet must not be used for screening purposes.
  2. Roof lights and associated shafts through the roof space must be sealed with a non-combustible sleeve or lining.
5. BAL — 40

Roof lights must comply with clause 8.6.5 of the BAL — 40 requirements of AS 3959 with the following variation:

  1. Roof lights and associated shafts through the roof space must be sealed with a non-combustible sleeve or lining.
6. BAL — FZ
Roof lights must comply with clause 9.6.3 of the BAL — FZ requirements of AS 3959.

ROOF-MOUNTED EVAPORATIVE COOLING UNITS

1. BAL — Low
No requirements.
2. BAL — 12.5

Evaporative coolers must comply with clause 5.6.5 of the BAL — 12.5 requirements of AS 3959 with the following variation:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.
3. BAL — 19

Evaporative coolers must comply with clause 6.6.5 of the BAL — 19 requirements of AS 3959 with the following variation:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.
4. BAL — 29

Evaporative coolers must comply with clause 7.6.5 of the BAL — 29 requirements of AS 3959 with the following variation:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.
5. BAL — 40
Evaporative coolers must not be installed where the site has been classified as BAL — 40.
6. BAL — FZ
Evaporative coolers must not be installed where the site has been classified as BAL — FZ.

OTHER ROOF PENETRATIONS

(including roof ventilators, aerials, vent pipes and supports for solar collectors)

1. BAL — Low
No requirements.
2. BAL — 12.5

Roof penetrations must comply with clause 5.6.5 of the BAL — 12.5 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.
  2. All components of roof ventilators (including rotary ventilators), aerials, vent pipes and supports for solar collectors must be of non-combustible material.
3. BAL — 19

Roof penetrations must comply with clause 6.6.5 of the BAL — 19 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.
  2. All components of roof ventilators (including rotary ventilators), aerials, vent pipes and supports for solar collectors must be of non-combustible material.
4. BAL — 29

Roof penetrations must comply with clause 7.6.5 of the BAL — 29 requirements of AS 3959 with the following variations:

  1. Aluminium mesh or aluminium perforated sheet must not be used for screening purposes.
  2. All components of roof ventilators (including rotary ventilators), aerials, vent pipes and supports for solar collectors must be of non-combustible material.
5. BAL — 40

Roof penetrations must comply with clause 8.6.5 of the BAL — 40 requirements of AS 3959 with the following variation:

  1. All components of roof ventilators (including rotary ventilators), aerials, vent pipes and supports for solar collectors must be of non-combustible material.
6. BAL — FZ

Roof penetrations must comply with clause 9.6.3 of the BAL — FZ requirements of AS 3959 with the following variation:

  1. All components of roof ventilators (including rotary ventilators), aerials, vent pipes and supports for solar collectors must be of non-combustible material.

GUTTERS AND DOWNPIPES

1. BAL — Low
No requirements.
2. BAL — 12.5
Gutters and downpipes must comply with clause 5.6.7 of the BAL — 12.5 requirements of AS 3959.
3. BAL — 19
Gutters and downpipes must comply with clause 6.6.7 of the BAL — 19 requirements of AS 3959.
4. BAL — 29
Gutters and downpipes must comply with clause 7.6.7 of the BAL — 29 requirements of AS 3959.
5. BAL — 40
Gutters and downpipes must comply with clause 8.6.7 of the BAL — 40 requirements of AS 3959.
6. BAL — FZ
Gutters and downpipes must comply with clause 9.6.5 of the BAL — FZ requirements of AS 3959.

WATER AND GAS SUPPLY PIPES

1. BAL — Low
No requirements.
2. BAL — 12.5
Water and gas supply pipes must comply with clause 5.8 of the BAL — 12.5 requirements of AS 3959.
3. BAL — 19
Water and gas supply pipes must comply with clause 6.8 of the BAL — 19 requirements of AS 3959.
4. BAL — 29
Water and gas supply pipes must comply with clause 7.8 of the BAL — 29 requirements of AS 3959.
5. BAL — 40
Water and gas supply pipes must comply with clause 8.8 of the BAL — 40 requirements of AS 3959.
6. BAL — FZ
Water and gas supply pipes must comply with clause 9.8 of the BAL — FZ requirements of AS 3959.

VERANDAHS , DECKS, STEPS, RAMPS AND LANDINGS

(including balustrades, handrails or other barriers)

1. BAL — Low

Verandahs, decks, steps and trafficable surfaces of ramps and landings must comply with one or a combination of the following:

  1. A concrete slab-on-ground.
  2. A suspended concrete slab.
  3. Any supporting posts or columns must comply with the BAL — Low requirements of this table for supporting posts, column stumps, piers and poles.
  4. Any supporting walls must comply with the BAL — 12.5 requirements of this table for external walls.
  5. Where sheeted or tongued and grooved solid flooring is used, the flooring system must comply with the BAL — Low requirements of this table for flooring systems.
  6. Where a timber deck is used—
    1. the gap between the timber decking must not be less than 5 mm; and
    2. to facilitate access for extinguishment, the perimeter of the deck must not be enclosed or access to the space beneath the deck impeded; and
    3. The timber decking and flooring must be separated from the remainder of the building in a manner that will not spread the fire into the building.
2. BAL — 12.5

Verandahs, decks, steps and trafficable surfaces of ramps and landings must comply with the BAL — Low requirements of this table with the following variations:

  1. Any supporting posts or columns must comply with the BAL — 12.5 requirements of this table for supporting posts, columns, stumps, piers and poles.
  2. Where sheeted or tongued and grooved solid flooring is used, the flooring system must comply with the BAL — 12.5 requirements of this table for flooring systems.
3. BAL — 19

Verandahs, decks, steps and trafficable surfaces of ramps and landings must comply with the BAL — Low requirements of this table with the following variations:

  1. Any supporting posts or columns must comply with the BAL — 19 requirements of this table for supporting posts, column stumps, piers and poles.
  2. Any supporting walls must comply with the BAL — 19 requirements of this table for external walls.
  3. Where sheeted or tongued and grooved solid flooring is used, the flooring system must comply with the BAL — 19 requirements of this table for flooring systems.
  4. Where spaced timber deck flooring is used, bushfire-resisting timber must be used for the decking material.
4. BAL — 29

Verandahs, decks, steps and trafficable surfaces of ramps and landings must comply with the BAL — Low requirements of this table with the following variations:

  1. Any supporting posts or columns must comply with the BAL — 29 requirements of this table for supporting posts, column stumps, piers and poles.
  2. Any supporting walls must comply with the BAL — 29 requirements of this table for external walls.
  3. Where sheeted or tongued and grooved solid flooring is used, the flooring system must comply with the BAL — 29 requirements of this table for flooring system.
  4. Where spaced timber deck flooring is used, bushfire-resisting timber must be used for the decking material.
  5. Balustrades and handrails must be non-combustible, or if timber is used, it must be bushfire-resisting timber.
5. BAL — 40

Verandahs, decks, steps and trafficable surfaces of ramps and landings must comply with the BAL — 40 requirements of AS 3959 with the following variation:

  1. Balustrades and handrails must be non-combustible.
6. BAL — FZ

Verandahs, decks, steps and trafficable surfaces of ramps and landings must comply with BAL — FZ requirements of AS 3959 with the following variations:

  1. Balustrades and handrails must be non-combustible.

Add SA Part G7 as follows: