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639  Victoria  Street  Melbourne   General  View  

  This  section  of  building  displays   a  series  of  apartments  that  sit   above  a  preexisting  office  space.   In  constructing  these   apartments  the  office  space  had   to  remain  and  be  able  to   function  unaffected  throughout   the  construction  process.  As   such,  a  concrete  shell  was   effectively  built  around  the   office  space  as  we  can  see  at  the   bottom  of  the  building.  On  top   of  the  concrete,  huge  steel   beams,  almost  one  metre  high   were  run  horizontally  across  to   provide  the  support  required  to   continue  the  construction   process  above.  The  use  of  a   large  amount  of  concrete  in  this   construction  process  for   structural  members  also   provides  a  good  level  of  fire   protection,  which  is  important   in  a  development  of  this  size.  

Underground  Car  Park   In  the  underground  car  park  at   the  base  of  the  building,   concrete  features  as  the   predominant  building  material.   It  forms  both  the  floor  and   ceiling  slabs,  with  insitu   concrete  columns  supporting   the  roof  structure.  The  concrete   ceiling  is  very  important  in  this   section  of  the  structure,  as  it  is   where  most  services  of  the   building  are  passed  through,   including  considerable  amount   of  wiring.  The  fan  visible  in  the   bottom  right  of  the  image  is   used  as  an  extraction  fan,   removing  the  fumes  that  would   otherwise  gather  as  a  result  of   the  exhaust  from  cars.  Slatted   metal  screens  will  hide  it  from   view.  


Precast  Concrete  Wall  Panels    

  wall   Large  precast  concrete   panels  have  been  cast  and   cured  off  site  before  being   delivered  to  the  location  and   lifted  into  place  by  cranes,   acting  as  primary  structural   elements.  This  method  allows   the  sections  to  have   consistency  in  terms  of   strength,  durability  and  finish   (Ching  2008,  p.5.10).  This   technique  also  avoids  the   need  for  onsite  formwork,   resulting  in  a  much  quicker   and  more  streamlined   construction  process  that  then   reduces  the  labor  required   and  therefore  lowers  the  cost   of  the  building  process.  

Floor  Slabs   Prestressed  concrete  has  been   used  for  the  floor  slabs,   specifically  the  technique  of   posttensioning.  Steel  tendons   have  been  stretched  and  tied   at  each  end  and  then  concrete   has  been  cast  around  these   tendons  (Ching  2008,  p.4.08).     This  allows  the  slabs  to  carry   greater  loads  and  span  larger   distances  whilst  also  reducing   the  thickness  required  of  the   slabs.  This  is  important  for  the   structure  as  it  minimizes  the   number  of  large  columns   needed  and  allows  the   developer  to  squeeze  in  as   many  levels  as  possible.  


Galvanized  Framing  

  This  image  highlights  the  area  of   construction  surrounding  the   pool.  The  framing  that  is  going  up   around  the  pool  to  support  the   roof  structure  is  galvanized  steel.   Any  steel  members  that  have  the   potential  to  come  in  contact  with   the  swimming  pool  water  must  be   completely  galvanized,  which  is   why  the  vertical  columns  must  be   completely  galvanized  to  their  full   five  meter  height.  The  site   manager  showing  us  around   described  how  a  swimming  pool   is  one  of  the  biggest  problems  in   apartment  developments,   particularly  if  it  is  raised  above   the  ground  or  up  any  levels,  as   this  one  is.  They  are  prone  to   leaking  and  this  can  obviously   cause  damage  to  any  levels  below   and  so  must  be  heavily  lined  and   waterproofed  to  try  and  avoid   this  issue.  

Under  Floor  Membranes  

This  image  shows  a  black  soundproofing   membrane,  which  is  laid  under  the  tiled  area   of  the  kitchen  to  avoid  noise  travelling  to  the   apartment  below.  As  well  as  soundproofing   membrane,  areas  subject  to  increases   contact  with  water  must  have  a  double  layer   of  waterproofing  membrane.  In  the   apartments  we  were  shown  this  includes   the  bathroom,  and  the  balconies.  Balconies   are  another  problem  area  for  builders,  as   they  cannot  control  the  amount  of  moisture   they  will  be  subjected  to,  and  as  such  as  well   as  having  a  double  membrane  must  also   have  screed  put  down  and  sloped  so  that  the   water  can  be  drained  as  best  as  possible.    


639 victoria street melbourne