CIBSE Australia and New Zealand 30th Anniversary

© Arup, May 2017
CASE STUDY 50 MARTIN PLACE
Section view showing ventilation and fire strategy
High-level exhaust
High-level exhaust
This did not meet Macquarie’s desire for the atrium
to be open and therefore enhance connectivity and
collaboration within the business.
To achieve an open-edged atrium – and provide the
required interconnectivity – a performance-based,
fire-engineering design was developed by Arup’s fire
engineers. In the event of fire, the non-fire floors are
smoke-separated from the atrium by a combination
of drop-down smoke curtains and glazed panels,
required to resolve tricky detailing around large
heritage beams.
The fire floor remains open to the atrium, and large
smoke exhaust fans extract from the top of the
atrium at a rate of 40m3/hr, while make-up air comes
from automation of existing heritage balcony doors
at level two, combined with the general supply air
system.
The new client floors constructed within the
glass-dome roof extension are open to the atrium.
For these floors, exiting through a smoke-proof
construction to fire-escape stairs – off an external
terrace – enables occupants to move to a place of
relative safety before evacuating.
This approach allows for high-occupant numbers to be
accommodated within the client entertaining areas.
Sprinklers are provided throughout the building to
keep fire sizes low. Smoke detection – including
beam detection in the atrium – provides for early
warning, while pressurised escape routes give people
time to evacuate the fire floor and those adjacent to
it, simultaneously. There is staged evacuation for the
remaining floors.
Another significant task was to upgrade the
numerous styles of heritage luminaries on the
original staircases and the halls, some of which were
gas mantle luminaires.
To upgrade the historic fittings, a number of diffuse
LED sources were developed, effectively replicating
the optical distribution of older tungsten lamps, while
increasing the lumen output to meet the egress
requirements.
50 Martin Place demonstrates how new life can be
breathed into a historic building, to create an exciting
contemporary workplace. The project highlights that
the unique characteristics of such a construction
requires highly bespoke engineering solutions.
The result, however, is a building that is prudent
in the reuse of existing resources, energy efficient
in performance, and – most importantly – meets
the client’s objectives of creating an inspiring and
efficient place to work.
Lighting
The office lighting layout was developed
to reinforce the structural and ceiling grid
in the original building, and to expose
‘To take such a distinctive property the historic fabric and previously fully hidden behind
modernise its working environment
the ceiling.
in a manner
The offices and atrium have perimeter,
sympathetic to its heritage status was a complex
ceiling-mounted daylight sensors that
task. The atrium in particular dim required the adjacent a lighting holistic when sufficient
approach from all our disciplines daylight reaches to achieve the work the desks.
desired environment, and close
To maximise
collaboration
the effect of
with
the widened
atrium, it was decided not to add any
the project team to deliver further Macquarie’s equipment vision’ to light the void.
Vertical circulation lighting is managed
Andrew Pettifer
using integrated balustrade lighting in
Project Director and NSW Region the stair. Leader This - also ARUP plays on the perforated
balustrade panels, giving the stair the
appearance of a glowing ribbon rising up
through the generous space.
At high level, the need to mount
luminaires beneath the glazing has been
avoided by the design of self-illuminated
glass bridges. At the base of the atrium, an
indirect mirror system is used to redirect
light to the traders. The luminaires and
mirrors are mounted to the exposed beams
at the perimeter of the void, to provide clear
Kindly reproduced, courtesy of the CIBSE Journal,
first published - November, 2014.
Solid smokeproof
construction
Smoke curtains
on non-fire
floors deployed
to protect floors
from smoke in
the atrium
Smoke curtains on
the fire floor retract
to allow smoke to
be released into the
atrium
Natural make-up
air from outside
via L2
Chilled beam cooling strategy
Passive chilled beams
Fire Cold water circulates safety engineering
within finned, chilled
water pipes. The
While beams cool the down large open atrium allows daylight to
the surrounding
penetrate
air, creating a cool
deep into the building, it did provide
convection current
the engineers with a tough challenge in terms
of fire safety. The Building Code of Australia
Internal blind
limits
High performance
the number of floors that can be
internal blind is
connected needed for comfort via openings to two above ground,
and glare control
although any number may be connected via a
sealed atrium.
Perforated The requirements metal for a sealed atrium
ceiling
are
The
onerous,
ceiling
with glazing and wall-wetting
provides some
systems, smoke exhaust, emergency power,
radiant cooling
multiple
effect, but allows
exit routes for any balconies, and –
convection air
importantly currents to pass – no real connection to the floors.
through it
Underfloor tempered and dehumidified fresh air
This did not meet Fresh Macquarie’s air is delivered to the desire space via a pressurised for the
floor plenum. This provides minimal background
atrium to be open
cooling
and therefore enhance
connectivity and collaboration within the
business.
To achieve an open-edged atrium – and
provide the required interconnectivity – a
performance-based, fire-engineering design
was developed 360° by Arup’s fire engineers.
In the event of fire, the non-fire floors
are smoke-separated
efficiency
from the atrium by a
combination Our new VRV of drop-down IV heat recovery smoke curtains
L10 permanently
open to the
atrium
Low-level
mechanical
make-up air
from floor
level
Natural makeup
air from
outside via L2
L1 & L2
permanently
open to the
atrium
CASE STUDY 50 MARTIN PLACE
Integrated service modules
Sections within the ceiling
will house high level
services, such as lighting,
sprinklers, emergency lights
and speakers
detailing around large heritage beams.
The fire floor remains open to the atrium,
and large smoke exhaust fans extract from
the top of the atrium at a rate of 40 m 3 /hr,
Internal heat loads
while make-up air comes from automation of
Heat from people
existing heritage balcony doors at equipment level two, and lighting
rises naturally to the ceiling
combined with the general supply where air it is system. cooled down by
the chilled beams
The new client floors constructed within
the glass-dome roof extension are open to
the atrium. For these floors, exiting through a
smoke-proof construction to fire-escape stairs
– off an external terrace – enables occupants
to move to a place of relative safety before
evacuating.
This approach allows for high-occupant
numbers to be accommodated within the
client entertaining areas.
Sprinklers are provided throughout
design
your comfort. our world.
the building efficiency to keep fire sizes low. Smoke
detection – including beam detection in the
atrium – provides for early warning, while
pressurised escape routes give people time to
evacuate the fire floor and those adjacent to it,
simultaneously. There is staged evacuation for
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