Deemed–to–Satisfy (DTS) | Task Report

Task 1
The report shows assessment of a residential building having basement of two storey meant for
carpark and above it five storey for residential. The main aim of this paper would be to identify
the non-compliance issues as per the proposed Deemed – to – satisfy (DTS). Building Code of
Australia provision and recommended compliance provided to overcome non-compliances.
The list of provided Deemed – to – Satisfy that would require to be addressed through alternative
solution, designed amended and additional of information would include:
BCA Clause Provision of Deemed-to-Satisfy that needs to be addressed
C2.6
Separation of
external walls
vertical
openings
Non-compliances locations includes:
Northern Elevation
Existence of horizontal construction at level 3 – 6 whose extension is less than
450 mm past the openings
Eastern elevation
Existence of horizontal construction at level 3 – 6 whose extension is less than
450 mm past the openings

D1.4
Traveling exit
distances
Travelling distance extended inside the carpark is 40.163 millimeters from the
corner of the right-hand carpark both in basement 1 and basement 2.
It is recommended that the fire engineers would provide suitable points in
different directions based on the reference corners adjacent carpark in respect
to basement 1 and basement 2.
Level 3
The travelling distance path to the point of exit is more than six meters, being
8.017 m, therefore fire engineer would be required to recommend on the
performance solution.

Level 4 – 6
The travelling distance path to the point of exit is more than six meters, being
7.725 m, therefore fire engineer would be required to recommend on the
performance solution
D1.5
Alternative
exits distance
The alternative exit distance in basement 2 is greater than 60 meters, being
80.09 m.

The alternative exit distance in basement 2 is greater than 60 meters, being
75.19 m.
Point to note: The alternative exit distance is measured through the selected
point.
Fire engineer would be required to recommend on the performance solution.
D1.7
Travel through
isolated fire
exits.
Discharge from isolated stairways would impose a 6 m passing at any section
of the external wall. It would proper for the wall to have FRL more than
60/60/60 and internally protected openings based to C3.4

E1.5
Sprinklers
Detailed sprinkler valve enclosure would be required on the plans of the
architecture.
E1.6
Portable Fire
Extinguishers
The architectural plans should provide portable fire extinguishers.

Task 2
The data provided reviews the building based on Building Code of Australia 2016 Amendment 1
in relation to the residential seven storey building compliance assessment having basement of
two storey meant for carpark and above it five storey for residential.
Building classification Large building
Class 2 and 7a
Building storey rise Seven
Construction type Large building
A
Limitations of floor area Class 7
Area Less than 5000 m2
Effective height 38.7 – 10.05 = 28.65 m
Egress and access
Part D1
Escape provision
D1.2
Required
number of
exit
Compliance All the buildings
At least one exit at every storey level would be required
D.13
Where fire
exit isolation
would be
required
Compliance Class 2
Every serving exit that includes ramp or stairway should be fire-
isolated lest it passes through, connects or passes by less than 3
consecutive class 2 building storey and an extra storey of any
particular classification that would be included if;
 It is meant for ancillary purposes or accommodation of
vehicles
 Existence of sprinkler system that comply to the
specification of E1.5
 The exit required does not allow egress for or access to
and separated from the additional storey by constructions
that have;
A. for a non-loadbearing, FRL of -/60/60
B. For a non-loadbearing, FRL of 90/90/90
C. Absence of opening that would allow smoke or fire
D1.4
Travelling
exit distance
Non-
compliance
Class 2
i. Entrance doorway must be less than 6m from exit of a
sole occupancy unit
ii. Points on the room floor that are not included on unit sole
occupancy would be expected to be less than 20 m from

the point of exit
Compliance of the building
Class 7 building
Points on the room floor would be expected to be less than 20 m
from the point of exit
Travelling distance extended inside the carpark is 40.163
millimeters from the corner of the right-hand carpark both in
basement 1 and basement 2.
It is recommended that the fire engineers would provide suitable
points in different directions based on the reference corners
adjacent carpark in respect to basement 1 and basement 2.
Level 3
The travelling distance path to the point of exit is more than six
meters, being 8.017 m, therefore fire engineer would be required
to recommend on the performance solution.
Level 4 – 6

The travelling distance path to the point of exit is more than six
meters, being 7.725 m, therefore fire engineer would be required
to recommend on the performance solution
D1.5
Alternative
distance of
exist
between
Non-
compliance
Alternative distance of exist would require egress that must be;
a. More than 9 m apart
b. Uniformly distributed and practicable around or within
the served storey.
c. Less than
i. 45 m apart for class 2 and 3 building
ii. 60 m apart for other cases
d. Maintaining 6 m apart and avoiding convergence of
alternative paths
The alternative exit distance in basement 2 is greater than 60
meters, being 80.09 m.
The alternative exit distance in basement 2 is greater than 60
meters, being 75.19 m.

Point to note: The alternative exit distance is measured through
the selected point.
Fire engineer would be required to recommend on the
performance solution.
D1.6
Exits
dimensions
and exit
paths of
travel
Require
compliance
a. The unobstructed height should be more than 2 m except
doorway height which may be reduced to more than 1980
mm
b. The unobstructed width of every exit or path except
doorway which must not be less than;
i. 1 m
ii. 1.8 m for corridors, passageway or ramp
D1.7
Travel
through
isolated fire
exits.
Non
compliance
Discharge from isolated stairways would impose a 6 m passing
at any section of the external wall. It would proper for the wall to
have FRL more than 60/60/60 and internally protected openings
based to C3.4

D1.13
Accommodat
ed number of
persons
Informational The number of people that would be accommodated in the
storey, mezzanine or rooms would be determined through
considering the purpose the building would be used and floor
layout;
a. Calculation of the sum of numbers through division of
floor area of every storey part by the number of square
meter per individual based on table D1.13 and according
to the use while not including spaces that are set apart;
i. Stairways, escalators, lifts, corridors and lobbies
ii. Service duct and other ancillary uses
iii. Seating capacity in the room

Services and equipment
Equipment for fire fighting
E1.3
Fire hydrants
Non compliance The system of hydrant provided would comply with
AS 2419.1-2005 in order to serve the building that has
a floor area more 500 m2
Booster
The booster would be required to be;
i. Within sight
and placed on
the building
main entrance
Compliance
ii. Constructed
with a fire
resistance
rating that is
more than FRL
90/90/90 for a
distance more
than 2 m each
side to separate
it from the
building.
Construction
of fire
resistance
was not
provided
Fire
engineer
would be
required to
recommend
on the
performance
solution.
E1.4
Fire hose reel
Compliance It would be provided to serve ground floor and
basement carpark where hydrants are installed or
where there is no installation of internal hydrants
E1.5
Sprinklers
Non-compliance It would be provided to serve basement carpark.
Detailed sprinkler valve enclosure would be required
on the plans of the architecture
E1.6
Portable Fire
Extinguishers
Non-compliance Require to serve class A fire risks for class 2 building
The architectural plans should provide portable fire
extinguishers.

Part E2
Management of smoke hazard
E2.2
General requirement
Compliance required The management would
require air handling system
that would not form part of
management of smoke hazard
based on table E2.2a and
E2.2b and is also able to
recycle air from fire
compartments that may
contribute to smoke
distribution within the fire
compartment which must;
i. Installed and designed
to operate as a control
system of smoke
ii.
A. As a smoke
damper
B. Shutting down
system of air
handling while
activating smoke
damper that would
be closed
automatically by
the detectors of
smoke
Class 2 (residential)
Automatic detection of smoke
and system of alarm that
comply with E2.2a

specification
Class 7a building
This class includes a basement
that is fixed with mechanical
ventilation system based on
As 1668.2
Part F2
Light and ventilation
F4.1
Natural light
provision
Compliance The class 2 building habitable rooms must be provided with
natural light
F4.2
Extends and
methods of
natural light
Require
compliance
Natural lights would be provided by’
i. Windows that;
a. Have transmitting area of aggregate light
b. Opens to the sky
ii. Roof light that
a. Have transmitting area of aggregate light
b. Opens to the sky
C2.6
Separation of
Windows separations would be required to provide;
 Horizontal construction or slab that are non-

external walls
vertical
openings
combustible have FRL of more than 60/60/60
Northern Elevation
Existence of horizontal construction at level 3 – 6 whose
extension is less than 450 mm past the openings
Eastern elevation
Existence of horizontal construction at level 3 – 6 whose
extension is less than 450 mm past the openings

Section B
Introduction
The solution of the building will require compliance to BCA in order to meet the requirement of
the relevant performance. The satisfaction of the compliance to performance requirement by:
a. Solution of performance
b. Solution to deemed – to – satisfy
c. Combination of both the solution of performance and deemed – to – satisfy.
The provision of deemed – to – satisfy would provide solutions to the ready-made building with
inevitability compliance. The option of performance solution would allow innovation and
flexibility in design. Solutions provided for performance would be used for provision of fire
safety of BCA and would involve skills of fire engineering.
The development of solution on fire safety performance always would be complex and normally
it would require input of the stakeholders. Therefore, to avoid time wastage earlier design
consideration of performance solution would be required to ensure proper construction or design.
In addition, performance solution would not be classified as non-compliance mechanism for
accepting building standards but it would act as a pathway that would clearly demonstrate
compliance with requirement BCA performance.
Deemed – to – satisfy
Residential Glazing systems

Clause Deemed – to – satisfy compliance
Clause 3.6.0 a. P2.1.1 and P2.2.2 performance
requirement would be used for glazing
and windows satisfaction if
constructed and designed based to AS
2047 for the external wall
b. P2.1.1 performance requirement would
be used to satisfy glazing if
constructed and designed based to AS
1288 for the glazed assemblies that
would not be covered by part (a)
Performance Solutions
It involves methods that would lead to compliance with performance requirement rather than
solution of deemed – to – satisfy:
a. Performance requirement compliance
b. Equivalent the provision of deemed – to – satisfy
c. Assessed based on one or more methods of assessment
Building surveyor would be involved in earlier design stage to provide proper guidance and BCA
interpretation for the project. The solution of the performance would involve designs done by
specialist, like fire safety would require qualified fire engineer to design the fire safety. The
surveyor would approve performance solution that complies with performance BCA requirement
while signing design compliance certificate.
Proposed solutions
To comply to action resistance and structural stability P2.1.1 the requirement BCA compliance
that contains wind load structural provision information mentioned in table 3.6.3 thickness of
glass showing a class of wind that do not exceed N3 would be used to provide the glass that
would be used to be annealed.
To comply to weatherproofing P2.2.2 a fully glazed sealed integrated unit and filled with argon
would be used. Hence, the windows are both water and air sealed and installed into a frame of
timber with external silicon grade used for waterproofing.

Summary
The proposed solution should ensure it covers;
 Complete details on building performance requirement
 Assessment method used to create compliance for the building performance requirement
 Expert detailed judgment based on expert qualification experience
 Calculations or tests detailed that would be used to determine compliance for the building
performance requirement
Task 3
Introduction
The report shows analysis of fire engineering of a proposed fire safety alternative design for
specific system of fire resisting wall used as external system of wall with 1 m boundary of class
7b buildings of type C construction based on BCA.
The tested external wall would include a Promina 60 of 15 mm thick Calcium silicate board.
The provision of Deemed – to – Satisfy C1.1 in accordance to BCA would show that based to
this type and classification of construction, the elements of the external load bearing must have
specific levels of fire resistance when outside testing would be done:
 Location should be 1.5 m from features of fire source – 90/90/90 FRL
 Location should be 1.5 m but less than 3.0 m from features of fire source – 60/60/60 FRL
The system of wall would be tested by subjecting it to heat flux radiant of 80 kW.m2.
Description of wall system tested for alternative proposed solution
The tested external wall would include a Promina 60 of 15 mm thick Calcium silicate board with
cladding of Monoclad steel on the external face. The approximate dimensions of the panel
boards would be 1220 mm by 2440 mm by 15 m. the cladding panels of Monoclad are 0.42 BMT

and its wideness is about 762 mm with a positive and negative deviation of 4 mm. The panels
clad are screw fixed to steel grit through 60 boards.
Relevant provision of Deemed – To – Satisfy in accordance to BCA
The provision of Deemed – to – Satisfy C1.1 would require an external load bearing building
wall having 1.5 m of features of fire source in order to achieve 90/90/90 FRL for Type C
buildings construction.
Fire safety solution
Analysis of fire resistance spread of fire and structural adequacy when it would be exposed to the
heat flux radiant of 80 kW.m2 on outer face.
BCA requirement CP2 for spread of fire
The building should have a degree of elements that would be necessary to avoid the spread of
fire;
i. To exits
ii. Public corridors
iii. In buildings
iv. Between buildings
BCA requirement CP1 for structural adequacy
The building should have a degree of elements that would be necessary to maintain stability of
structure during fire to;
i. Building function
ii. Fire load
iii. Fire intensity
iv. Fire hazard
v. Building height
vi. Evacuation time
Conclusions
The provision of Deemed – to – satisfy based on BCA requires the external wall load bearing
system for class 7b that include warehouses of Type C construction would have a level of fire
resistance of at least 90/90/90 when it would be located at a distance less than 1.5 m from the
feature of fire source.