Speed Floor Melbourne Engineers Presentation & Techinicial Data

Speedfloor is a unique
and innovative
suspended concrete
flooring system
combining a light gauge
roll formed steel joist
compositely with an in-
situ concrete topping to
form a material efficient
and cost effective
concrete floor.
Welcome
www.speedfloor.com.au

The System
How it works
Design
Project examples
Introduction

The System
 The Speedfloor joist and
the formwork system
was designed and
exhaustively tested in
New Zealand before its
introduction into
Australia and then the
global market place.

 At the heart of the system is a
rollformed, galvanised steel joist.
 The joist is manufactured from
pre-galvansied, high tensile steel
in a rollformer where in a single
integrated operation, it is
rollformed, punched, pressed,
pre-cambered and cut to length at
a fast production rate.
The Joist

 The end-pieces are simply
bolted to the joists which
are then ready to ship.
Ready to go
 They can be palletized,
containerised or loaded
onto transport for direct
delivery to site.

 The individually marked
joists, strapped in bundles,
are lifted onto the support
medium where they can
safely remain until required.
On site

On site
• The joists are then
spread and locked into
their final positions with
use of lockbars.
• Plywood forms are
introduced from the top
to form the slab
shuttering system.

 The reinforcement is
now ready to place.
 The top section of
the joist supports the
reinforcement and
becomes embedded
in the concrete topping
for composite action.
Ready for reinforcement

 The cam action of the
lockbar tightens the ply
formwork against the Joist
giving a clean and generally
slurry free joint meaning little
or no cleanup is required.
Ready for reinforcement

 3 days after the concrete is
poured the shutter system
is removed revealing a
clean fresh suspended
concrete floor.
 Services can pass through
the pre-punched holes and
the bottom of the joist can
support a suspended
ceiling fixed to the joist.
The end result

How it works - The Joist
 It is the compression element of the non-
composite joist during construction
 It is the chair or stool that supports the
wire mesh or the reinforcement that
develops negative moment capacity in the
concrete slab over the joist
 It locks in and supports the slab
shuttering system (lockbars and plywood
forms)
 It becomes a continuous shear connector
for the composite system.
The top section of the joist that becomes embedded into
the concrete slab has 4 functions :

 The mid section or web of the joists has the
flanged service hole and the lockbar hole
punched into it
 The flanging of the service hole provides
stability to the web and services can pass
thru without requiring protection from the
sharp edges of the punched material
 The 60mm by 25mm diameter lockbar
holes are punched at 150mm centres to
receive the lockbars and afford evenly
distributed support for the plywood

 The bottom triangular section of the joist acts as a
tension member both during the construction phase
and when the joist is acting compositely with the slab.

 The lockbars support the temporary plywood formwork between the
joists during construction. They are spaced approximately 300mm
apart and engage in the slotted holes punched in the top section of
the joist. They also maintain the exact spacing of the joist
How it works - The Lockbar

How it works - The Lockbar
 The standard lockbars when installed will position the joists
1230mm, 930mm or 630mm apart.
 There are also special adjustable lockbars that will position the
joists in increments of 50mm from 330mm up to 1530mm.
 Other types of lockbars provide for special situations such as
cantilevers or lowered soffits.

 High-density paper overlaid, 12mm formply is used as
formwork to produce a first class finish to the underside of the
slab
How it works - Temporary plywood formwork
 The rigid formply sheets are
used in conjunction with the
lockbars and when locked in
place, provide lateral stability
to the entire Speedfloor
system during the construction
phase.

 Steel frames structures
 Masonry buildings
 Poured insitu or precast concrete frames
 ICF or Sip’s type construction
 Light gauge steel frames
 Timber frames
Support medium
The Speedfloor composite floor system is suitable for use in
all types of construction including :

 Single residential houses
 Multi-storey residential buildings
 Single and multi-storey retail developments
 Mezzanine floors
 Carpark and storage buildings
 Multi-storey office complexes
Potential use
The range of ends users includes :

 The Speedfloor System is essentially a hybrid
concrete/steel tee-beam in one direction and an
integrated continuous one-way slab in the other
 The joist is manufactured from G350 mPa, Z275
pre-galvanised steel
 The rollformed shape with its pressed web produces
a rigid and accurate steel section that has high load
carrying capacity with no propping requirements.
Design

 The performance of the Speedfloor slab is similar to that
of a conventional in-situ poured slab.
 To achieve STC 55 or more a board system on a timber or
steel grid can be attached directly to the underside of the joist.
 Alternatively the concrete topping can be increased until the
required rating is achieved.
Acoustics

Seismic
 The general arrangement of the joist and the shoe end
together create a number of very real advantages for
the Speedfloor system in seismic regions. Seismic
design promotes relatively rigid interconnection of
elements under normal conditions and flexible
connection when subjected to seismic disturbance. It is
absolutely imperative that the floor/beam connection
does not induce moments into other elements of the
structural system that would compromise the integrity of
the structure.

 The use of a ‘pin-jointed’ or ‘simply-supported’
connection between the concrete floor and the support
structure allows the Speedfloor to flex without shearing
preventing catastrophic collapse. The shoe will remain
as a fail-safe mechanism on top of the support medium.
Reinforcement bars connected to the structure prevent
horizontal displacement of the concrete floor.
Seismic continued

 The Speedfloor system generally uses much less
concrete than pre-cast or in-situ concrete alternatives
and hence has less mass. Under seismic conditions
mass creates inertial force so less mass means less
inertial force which can dramatically limit damage
 As a ductile suspended concrete floor incorporating a
relatively high percentage of steel, Speedfloor is ideally
placed to help dissipate the dynamic shock involved in
seismic loading
 Speedfloor has the ability to act as a diaphragm and
transfer the lateral forces through the floor to the shear
walls located in other parts of the building.
Seismic continued

Full scale fire testing has established that the Speedfloor
system can be fire rated and will meet fire rating
requirements set out in the Building Code. Option for fire
protection are numerous but will include :
Fire
 The use of fire retardant boards including gypsum and
other cementitious board systems
 Sprayed cementitious products directly onto the
Speedfloor joist
 The addition of reinforcement to the concrete topping
using the Slab Panel Method or other engineered
design methods

 Speedfloor rollformed joists are made from high
strength, pre-galvanised steel
 Concrete slab topping designed for minimum
compressive strength of 32MPa after 28 days
 Floor system design conforms to Composite Structure
Standards
 Durability meets Building Codes’ performance criteria.
Design

200 Series
Details
250 Series
400 Series

Load span
Load span graph – 75mm topping
Load v span tables are available that will optimise the Joist and concrete topping combinations.
 A load span calculator is also available that will further refine input information and give
engineers and users detailed data on the performance of the joist and topping selected.

 This 7 storey building was
constructed using a structural
steel frame, Speedfloor
suspended concrete flooring
system and pre-cast concrete
cladding.
Route 66, Broadway, NZ

 The ground floor retail has
exposed Speedfloor joists fire-
proofed using intumescent
paint.
 The store’s services, such
as electrical cabling, have been
accommodated through the
exposed joists.
Route 66, Broadway, NZ

 The lightweight combination of
the Speedfloor joists and
structural steel resulted in
minimal foundations and a 16
week building program for this 10
storey carpark.
Commerce St Carpark

 The ramp structure is
cantilevered over an existing
building next door via steel
trusses on the roof which
required the carpark decks to
be in place before the ramps
decks could be built.
Commerce St Carpark

 This 22,000 m2
(220,000 ft2
)
carpark is staff and patient
parking for Auckland Hospital.
The lightweight steel structure
also accommodates three
helicopter pads on the top floor.
Auckland Hospital Carpark

 This commercial two-
storey building with
basement carparking was
designed for a Blood-bank
and commercial use.
Dilworth Building

 Easy access for extensive
range of services in the
floor-ceiling space was the
advantage offered by the
use of Speedfloor.
Dilworth Building

 This 12 level apartment
block with a footprint of
1750sq m is built in
Wellington, one of New
Zealand’s more notorious
seismic regions.
The Terrace

 These 86 up-market
apartments were built in
Auckland with stunning
views of the harbor
 The first two levels
are for apartment parking
The Terrace
these

 These twin 12 storey apartment
buildings were built using a pre-
cast concrete core and structural
steel frame.
 Speed of erection and the ability
to take the floor system off the
critical path were key ingredients
in the developer’s decision
to use Speedfloor.
Oceanside - Twin Towers

 Retail on the ground floor,
car parking on the first floor
and commercial on the top
two floors made this small
building a challenge to
construct.
Beresford St

 With internal spiraling vehicle
access ramps, noise and fire
ratings were achieved with a
combination of sprayed-on
products and suspended fire
rated ceilings.
Beresford St

Summary of important advantages
 Cost effective
 Lightweight, requiring less cranage than other systems
 Speed of erection
 Easily accommodates services
 Meets fire and acoustic requirements
 Flexible in its application
 No Propping
 A general weight saving throughout structural components

In this presentation we have endeavored to show you the many
benefits of the Speedfloor suspended concrete flooring system.
For additional information please visit our website at
www.speedfloor.com.au or use the contact details below.
Email: info@Speedfloor.com.au
Ph: 1300 66 77 67
Address: PO Box 3540 MANUKA ACT 2603
Contact Us

Speed Floor Melbourne Engineers Presentation & Techinicial Data

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