Formwork for Concrete

							Covered Outdoor Learning Area ( Small )                               0311 CONCRETE FORMWORK



0311 CONCRETE FORMWORK




1     GENERAL


1.1   AIMS
Responsibilities
General: Construct formwork so that the concrete will have the required:
- Dimensions.
- Location.
- Profile.
- Shape.
Allowances: Allow for dimensional changes, deflections and cambers resulting from the following:
- Imposed actions.
- Concrete shrinkage and creep.
- Temperature changes.

Design
General: The design of formwork is the contractor’s responsibility.

1.2   CROSS REFERENCES
General
General: Conform to the General requirements worksection.
Associated worksections
Associated worksections: Conform to the following:
- CONCRETE FINISHES.
- INSITU CONCRETE

1.3   STANDARDS
General
Formwork design and construction: To AS 3610.
- Reinforced concrete design and construction To AS 3600.

1.4   TOLERANCES
General
Plumb of elements  8 m high: 1 in 1000.
Plumb of elements  8 m high: To AS 3610.
Position: Construct formwork so that finished concrete is in conformance with AS 3600 clause 19.5 the
Dimensional deviations schedule.

1.5   INSPECTION
Notice
Inspection: Give notice so that inspection may be made of the following:
- Completed formwork before concrete placing.
-




                                             Page 1 of 2                                 May 2009
Covered Outdoor Learning Area ( Small )                                  0311 CONCRETE FORMWORK



2     PRODUCTS


2.1   MATERIALS
Form linings and facings
Compatibility: To be compatible with finishes to be applied to concrete.

3     EXECUTION


3.1   PREPARATION
Cleaning
General: Before placing concrete, remove free water, dust, debris and stains from the forms and the
formed space.

3.2   CONSTRUCTION
General
General: Conform to the Concrete finishes worksection.
Release agents
Application: Before placing reinforcement, apply a release agent to form linings and facings.
Steel linings
Rust: Clean off any rust and apply rust inhibiting agent prior to reuse.
Visually important surfaces
General: For concrete of surface finish classes 1, 2 or 3, set out the formwork to give a regular
arrangement of panels, joints, bolt holes, and similar visible elements in the formed surface.
All visually exposed surfaces to have a class 2 finish, unless noted otherwise on drawings.
Adjacent paving
All footings adjacent paved areas to have class 2 finish, extending minimum 100mm below finished
paving levels.
Void formers
Use: Cast designated suspended ground floor slabs and beams on void formers.
Protection: If likely to be affected by (rain) water keep void formers dry until use, place them on a firm
level surface and place reinforcement and concrete with minimum delay.

3.3   COMPLETION
Formwork removal
Extent: Remove formwork .
Timing: Do not disturb forms until concrete is hardened enough to withstand formwork movements and
removal without damage.
Stripping:
- General: To AS 3600 where it is more stringent than AS 3610.
Vertical forms: Remove formwork that does not support weight of concrete from faces of beams, walls
and columns not less than a cumulative 24 hours after placing concrete during which the ambient
outdoor temperature has been greater than 10°C.

Dimensional deviation schedule




                                              Page 2 of 2                                      May 2009