Speedfloor Introduction

Speedfloor Introduction

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

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The System

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▪ 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 manually 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

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The range of ends users includes :

▪ Faster to install

▪ Less crane time

▪ Less labour

▪ Less materials onsite

▪ Less reinforcing steel

▪ Less concrete

▪ Zero propping

Speedfloor VS Conventional Formwork


Benefits of Speedfloor

Conventional framing using significantly more material, no access

Speedfloor soffit, clear access, no propping, less material

▪ Entirely stripped 3 days after pour

▪ Zero back propping

▪ Access for finishing trades 21 days

earlier than other methods

▪ More environmentally friendly

▪ Cost effective

▪ Fire rated to 90 mins

Speedfloor VS Conventional Formwork


Benefits of Speedfloor

Conventional framing using significantly more material, no access

Soffit formed with Speedfloor giving clear access and minimal material

▪ 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


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.

Speedfloor Gallery

Residential


▪ Luxury multi-level

residential apartment under

construction in Melbourne

▪ Structural steel frame with

speedfloor system allows

for rapid construction with

zero propping


▪ 120mm thick slab

▪ 1 layer of SL92 mesh

Residential


▪ Fit out of apartments

▪ Suspended ceiling attached

to bottom of joist or hung

from concrete soffit

Residential

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▪ Duplex suspended floor

constructed with speedfloor

spanning from structural

steel frame

Residential


▪ Suspended slab residential

build made simple with

Speedfloor and 90mm slab

Residential


▪ Speedfloor joist spanning

core filled block walls.

Rapid construction. Zero

propping

Residential


▪ Large townhouse

suspended slab formed

with insitu columns, steel

beams and Speedfloor

▪ Zero back-propping means

faster fit out

Residential

▪ 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.

Carparks


▪ 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.

Carparks


▪ This 22,000 m2 carpark is staff

and patient parking for Auckland

Hospital.The lightweight steel

structure also accommodates

three helicopter pads on the top

floor.

▪ Zero propping during the entire

construction period significantly

reducing time and onsite

materials

Carparks


▪ The structural steel on this

public parking building was

erected to its full height before the

speedfloor was started, giving the

contractor a clean, uninterrupted

installation run to the top floor of

the structure.

Carparks


▪ In doing this the project

achieved 2,150 sqm of finished

floor every 10 days.

▪ The feature panels for the

cladding were assembled on the

top of the parking deck and

“hung” in place before being

bolted in position

Carparks


▪ Additional level added to

existing building

▪ The lightweight Speedfloor

system made this possible

▪ Joist spanning from

conventionally formed beams

▪ No propping under Speedfloor

deck which enabled lower floors

to stay open

Additional floor to existing building




▪ 1 layer of mesh required



▪ One Structure supplied entire

form, reo, concrete package

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


For all quote enquiries please contact:

Anthony O’Sullivan

Email: [email protected]

Ph: 0422 002 526

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Documents

Speedfloor Introduction