form systems

8/3/2019 Form Systems

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Form systems

Only demanded in construction when in it must be molded vertically or suspended horizontally.

The cost of false work (either cost per use or overall lifetime costs) varies dramatically as tosystem chosen. Systems are chosen considering many factors, including;

The number of repeat uses. The desired finish

The amount of labor to install each use

Availability of experienced personnel to install it

Handling equipment available to move large sections around

The amount of wet concrete deliverable per cast

The amount of capital available

The speed of project

Versatility

Pour to strip times

The acceptability of cold joints.

Generally speaking, the faster you can strip the less wear on your forms.The faster you strip the greater the damage to the concrete possible.Coarse finishes will result even from smooth forms when they are stripped under 48 hours...(particles of sand are not well "stuck" and will leave surface and damage other particles bysliding)

In the 3rd world I try to strip in 6 hours so I can get 2 casts a day and keep the crew busy. Thesmother the surface and stiffer the form will determine the earliest strip times.

MaterialsNote! When we say advantages or disadvantages, we are only talking general terms, as formworkjobs come in all ranges and one persons crippling cost disadvantage may be insignificant toanother.

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Untreated wood

Advantages:-

low initial cost

low experience factor

low weight

versatile usually contains sugars that act as a retardant preventing sticking


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Formwork materials - Rough sawn timber used as formwork here to providean architectural effect.

Disadvantages:-

poor finish patching almost demanded if in a place where finished concrete will be seen

low per unit use (4-7)

high labor as each set must be "re-built" must wait till concrete is well set (24 hours) to strip

leaves a dusty finish as there are sugars in the sap of soft woods.

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Untreated plywood

Advantages:-Same as above for untreated timber but a smoother finish.Disadvantages:- Same as above but greater cost and availability in some countries.

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Coated Plywood

Advantages:-

Will increase durability.

Many commercial pre-coated plywood systems are available:-

Oil saturated paper.

vinyl and water resistant glue surface.


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Simple oil based paint will increase the number of uses by double as long as the edges arenot exposed to setting cement.

Epoxy paint coatings will extend the use of plywood to over 100 uses

Disadvantages:-

If uncoated surfaces are exposed the number of uses will equal un treated plywood. Increased initial cost

increased weight (thick paint is heavy),

more work to clean before each use,

release agents almost a must.

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Steel formworkAdvantages

has very high re use rates,

tens of thousands of uses possible

Example, cast cement in hollow blocks use a steel form.

Very smooth surfaces are possible.

STRONG and can be stripped late.

fast to install in simple walls and the like

low versatility (short walls can't be formed as nobody cuts steel for a single use),

many flooring systems use steel form as re-enforcement for single use.

Formwork materials - Permanent formwork that is left in place and becomespart of the structural strength of the slab. The steel angles around the


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perimeter also can be said to be part of the formwork.

Disadvantages.

Costs are 6 to 10 times a plywood form and much higher for specialty forms.

The thicker the surface of the steel sheet, the greater the weight.

Release agents are demanded as, if not used, cleaning labor will quickly overcome anyeconomy gained by durable surfaces.

Steel dents easy, so if your boys claim it is 'strong as steel' soon your formwork will bevery much less than flat.

Formwork materials - permanentformwork for a column. In this casesteel spiral formed on a machineprimarily used for air ducts. Concretepipes are also popular permanentcolumn forms.


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Formwork materials - Aluminiumextrusion edge form for tilt slabs.

Formwork materials - Cement blocksproduced in steel forms in theirthousands, are in turn used to formcomplex reinforced concrete walls.


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Fiberglass formwork.

I have not seen non-custom fiberglass systems, but they may be out there. A good use forfiberglass pans would be center floor decks in a high rise where the underside of the floor wasvisible, or in custom arch. designs on exterior of building.

Very smooth clean lines in unusual shapes are possible.

Many re-uses, 1000's depending on handling.

Strips fast.

long lead times. Building fiberglass forms requires first to build a form to shape the glass,then each cast has considerable work before your first concrete cast is possible.

Not as heavy as steel, but usually cast in such large sections weight exceeds the ability ofnon mechanized handling.

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Aluminum formwork.

Mostly for basements where nice finishes are needed. some very nice designs or finishes arepossible, "brick" look or "rock wall" look are some examples.

not as easy to damage as steel

Assembles fast.

Can be very costly to buy.

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Concrete itself as formwork.

Commonly called "pre-cast". Shapes that are built in such a way that when concrete is added itwill build the final structural shape and are never "stripped'.

Advantages:-

A single form can be used to build components of a large cast increasing form repeatsand decreasing the amount of forms needed.

It is possible to cast light shapes to build beams and hold dead loads.

Disadvantages.

Concrete is heavy.

Set times before handling are a factor.

Must be built strong enough to resist normal loads plus handling loads (increased re-bar).

Back to top.Fabric formwork

A system where a fabric membrane is stapled to very lightweight forms.

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Latex, rubber formwork


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Used in the production of small moulded concrete pieces that would be extremely hard by othermeans.

The rubber nature of the mould allows it to stretch when being stripped off the piece.

Typically used as a cottage industry type business making moulded garden ornaments etc.

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read more

Additional Information in Pdf

Please take a look at the following pdf documents for in dept detail about the formworkssystems.

Tub

Tub Panel

Tub Assembly Manual

Panel Assembly Manual

Modulo Public Buildings

Modulo Technical Characteristics

Modulo Residential

Elevetor Technical

Sky Full RC Slab

Skyrail

Skydome

Defender - Installation Handbook

Geotub Standard Report

Geotub QR Report

ASTM 3610 Test of Formwork

Antisismic Slab Solutions
http://www.formwork1systems.com/pdf/TUB.pdfhttp://www.formwork1systems.com/pdf/TUB_PANEL.pdfhttp://www.formwork1systems.com/pdf/TUB_PANEL.pdfhttp://www.formwork1systems.com/pdf/TUB_ASSEMBLY_MANUAL.pdfhttp://www.formwork1systems.com/pdf/TUB_ASSEMBLY_MANUAL.pdfhttp://www.formwork1systems.com/pdf/PANEL_ASSEMBLY_MANUAL.pdfhttp://www.formwork1systems.com/pdf/PANEL_ASSEMBLY_MANUAL.pdfhttp://www.formwork1systems.com/pdf/MODULO_PUBLIC_BUILDINGS.pdfhttp://www.formwork1systems.com/pdf/MODULO_TECHNICAL_CHARACTERISTICS.pdfhttp://www.formwork1systems.com/pdf/MODULO_RESIDENTIAL.pdfhttp://www.formwork1systems.com/pdf/MODULO_RESIDENTIAL.pdfhttp://www.formwork1systems.com/pdf/ELEVETOR_TECHNICAL.pdfhttp://www.formwork1systems.com/pdf/ELEVETOR_TECHNICAL.pdfhttp://www.formwork1systems.com/pdf/Sky_full_rc_slab.pdfhttp://www.formwork1systems.com/pdf/Skyrail.pdfhttp://www.formwork1systems.com/pdf/Skyrail.pdfhttp://www.formwork1systems.com/pdf/Skydome.pdfhttp://www.formwork1systems.com/pdf/DEFENDER_HANDBOOK.pdfhttp://www.formwork1systems.com/pdf/Report_Geotub_eng.pdfhttp://www.formwork1systems.com/pdf/Report_Geotub_QR_eng.pdfhttp://www.formwork1systems.com/pdf/ASTM_3610_Test_of_Formwork.pdfhttp://www.formwork1systems.com/ppt/Antisismic_Slab_Solutions.ppsxhttp://www.formwork1systems.com/pdf/TUB.pdfhttp://www.formwork1systems.com/pdf/TUB_PANEL.pdfhttp://www.formwork1systems.com/pdf/TUB_ASSEMBLY_MANUAL.pdfhttp://www.formwork1systems.com/pdf/PANEL_ASSEMBLY_MANUAL.pdfhttp://www.formwork1systems.com/pdf/MODULO_PUBLIC_BUILDINGS.pdfhttp://www.formwork1systems.com/pdf/MODULO_TECHNICAL_CHARACTERISTICS.pdfhttp://www.formwork1systems.com/pdf/MODULO_RESIDENTIAL.pdfhttp://www.formwork1systems.com/pdf/ELEVETOR_TECHNICAL.pdfhttp://www.formwork1systems.com/pdf/Sky_full_rc_slab.pdfhttp://www.formwork1systems.com/pdf/Skyrail.pdfhttp://www.formwork1systems.com/pdf/Skydome.pdfhttp://www.formwork1systems.com/pdf/DEFENDER_HANDBOOK.pdfhttp://www.formwork1systems.com/pdf/Report_Geotub_eng.pdfhttp://www.formwork1systems.com/pdf/Report_Geotub_QR_eng.pdfhttp://www.formwork1systems.com/pdf/ASTM_3610_Test_of_Formwork.pdfhttp://www.formwork1systems.com/ppt/Antisismic_Slab_Solutions.ppsx


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picture gallery

COLUMNS

ROUND COLUMNS

SQUARE COLUMNS

WALLS

SLABS

ELEVETOR

PANEL

TUB

TUB PANEL

TUB MODULO
http://www.formwork1systems.com/glr_columns.phphttp://www.formwork1systems.com/glr_round_columns.phphttp://www.formwork1systems.com/glr_square_columns.phphttp://www.formwork1systems.com/glr_walls.phphttp://www.formwork1systems.com/glr_slabs.phphttp://www.formwork1systems.com/glr_formwork_elevetor.phphttp://www.formwork1systems.com/glr_formwork_geopanel.phphttp://www.formwork1systems.com/glr_formwork_geotub.phphttp://www.formwork1systems.com/glr_formwork_geotub_panel.phphttp://www.formwork1systems.com/glr_formwork_modulo.phphttp://www.formwork1systems.com/glr_columns.phphttp://www.formwork1systems.com/glr_round_columns.phphttp://www.formwork1systems.com/glr_square_columns.phphttp://www.formwork1systems.com/glr_walls.phphttp://www.formwork1systems.com/glr_slabs.phphttp://www.formwork1systems.com/glr_formwork_elevetor.phphttp://www.formwork1systems.com/glr_formwork_geopanel.phphttp://www.formwork1systems.com/glr_formwork_geotub.phphttp://www.formwork1systems.com/glr_formwork_geotub_panel.phphttp://www.formwork1systems.com/glr_formwork_modulo.php


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With todays advances technology, concrete construction has reached a gigantic scale, which nolonger allows the use of timbers as a material for concrete forms. Timber foams requiring anarmy of skilled carpenters and craftsmen at construction sites have now mostly been replaced bystandardized factory made steel forms, which are more efficient to use, and are accurate and

economical.The Metal Formwork System is our response to global demands for advanced formwork methodsfor concrete structures providing numerous advantages:

1) Precision in engineering and fabrication ensures both strength and minimum weight for staticload conditions. Our formwork maintains absolute rigidity throughout the concrete pouringprocess with fewer supporting members and it can withstand rough treatment so it providesgreater safety for the on-site workmen.

2) Accurately aligned concrete structures with a smooth finish, even density and a minimum finare made possible by the greater (erection) rigidity of the Metal Formwork System.

3) Deterioration does not occur even under adverse conditions. The forms so not wrap, swell or

shrink.4) Design cost is reduced for any specify job because the standardized units can be adapted tosuit any particular requirement.

5) Erection and removal costs are also reduced because the bracing and tying works requires nospecial skills of the workmen and can be done mechanically. Thereby construction time andcosts are kept to a minimum.

6) Greater durability allows the Metal Foams to be used repeatedly on successive constructionsites, cutting costs.

7) Standardized sizes and shapes allow for greater ease in stacking and transporting.

8) The metal forms can be used for all concrete structures such as walls, columns, beams, slabs,etc


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Graphical Construction Glossary >> Temporary Work. >>

formwork >> Beam Formwork

Beam Formwork

Formwork for beams. This particular page shows a low tech all timber method

of forming a perimeter beam to a suspended slab.

Brace

An angled member working in compression only. Used to stiffen, straighten or

support shutters etc.

Kicker

A member parallel to the shutter being supported, hard up against theshutter and fixed to the support. A member parallel to the shutter being

supported but offset from the shutter to allow for the fixing of braces.


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The sketch above shows a cross section through the formwork for for a perimeter beam to asuspended slab.

The props are all timber in the traditional low tech manner adjusted with fox wedges, but if the

materials are available then steel props or steel shore frames would be used with a similar layoutfor the beam itself.

Also shown is the use of steel floor centers. These are rarely seen these days and timber joists arecommonly used.

For non glossary articles of a general and how to nature go to the formworksection on this site.

Go To Top :Beam Formwork
http://www.builderbill-diy-help.com/formwork.htmlhttp://www.builderbill-diy-help.com/formwork.htmlhttp://www.builderbill-diy-help.com/beam-formwork.htmlhttp://www.builderbill-diy-help.com/formwork.htmlhttp://www.builderbill-diy-help.com/beam-formwork.html


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"What can be added to the happiness of a man who is in health, out of debt, and has a clearconscience?Adam Smith 1723-1790

"When we build, let us think that we build for ever."John Ruskin 1819-1900
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Formwork solution for all projects

Formwork is when concrete or a similar material is poured into a temporary or permanent mould(according to wikipedia). It is mainly used in building and construction. Traditionally concrete,wood, and steel are the more common materials used in formwork. However, a new andrevolutionary material has taken over - plastic. There are numerous advantages to using plastic informworks; the most important being its cost effectiveness and environmentally friendlybenefits. In addition, you save on time-consuming labor and man power. Most jobs can be


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completed with two to three personnel. Planning and material requirements are simplifiedconcreted. Plus, the formwork is continually adjustable.

Benefits of Plastics in Formworks:

1. Due to the fact that concrete does not stick to plastic, formworks systems arerecyclable. Each component can be re-used for about 100 times as long as

properly cleaned and maintained, adding up to dollars saved and wasteeliminated!

2. Formworks systems are easy to clean and maintain. There is no need fordetergents and stripping agents. All that is required is water.

3. Formworks systems are modular and light-weight. This allows for faster andmore efficient set-up, disassembly, operation and storage.

4. The unique design of Formwork systems provide the option of results toremain in sight therefore eliminating the need for rework.

Columns

Reusable plastic formworks for concrete columns come in all shapes such as round, rectangularand square. There are many advantages to using formworks systems specifically for columns asopposed to disposable formworks made of cardboard or other materials.

1. The biggest advantage is that they are recyclable and may be used time andagain for an average of one hundred pours. This makes them environmentallyfriendly and cost efficient.

2. Cleaning and maintenance of the formworks are also eco-friendly and costefficient. Since concrete does not stick to plastic, there is no need to usedetergents and stripping agents. Rinsing with water does the job.

3. Ease of set up and handling and assembly on construction site make for afaster, smoother and more efficient job. This is due to the way that theformworks systems are made. They are small modular elements with specialhandles that lock perpendicularly. Column surfaces can be left in sightwithout the need for further rework.

4. Storage becomes hassle free with formworks systems since they can becompletely disassembled and do not need to be stored in a dry environment.


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Walls

Formworks systems make building concrete walls, basements, foundations, and pillars fast andeasy. The formworks come in various sizes that interlock via nylon handles to make up the wall.The speed and ease of set up make it much handier and cost effective than traditional wood orsteel systems. Wall thickness ranges from 10-40 cm based on different combinations of thevarious elements.

Advantages of using formworks system specifically for walls:

1. Ease and speed of assembly- The walls or foundations built using this systemcan be done so with only one person. Each element is light in weight anduses nylon handles that lock into the forms with a 90 degree turn. Eachelement is modular eliminating the need to cut to length.

2. Setting up - The external surface of the panels is ribbed making posting andplumbing much simpler. They have holes to fit standard off the shelf tie-rods.

3. Storage & handling - Formworks can easily be disassembled on site due tocomponents light weight and easy off handles. This eliminates the need touse a crane. Little maintenance and care is required making storage easy.

The system does not need to be stored in a dry environment.4. Formworks systems can be re-used up to 100 times and can remain in sight

with no further work necessary.

Slabs

The one-way ribbed concrete slabs created by formworks systems are used both in residentialand industrial buildings. In comparison to traditional slabs of hollow clay blocks or concrete,Formworks systems slabs are lightweight and significantly reduce consumables. The ribbing ofthe slab allows for cable, wires, sanitary fittings and lighting and air conditioning systeminstallations.


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Advantages of using formworks systems specifically for slabs:

1. Save on cost due to reduction in consumables

2. Increased job site safety- The system is self-supporting, can be erected from

below with no need for special safety features.3. Provides greater structural efficiency by eliminating consumable materials

between ribbing

4. Handling and storage - There is no need for detergents and releasing agentsdue to the nature of the material. Concrete does not stick to plastic so that allthe slabs need in order to remain clean are a good rinsing. The slabs areeasily disassembled due to their light weight. They can be stored in littlespace and do not suffer from moisture.

5. The unique ribbing design of the slabs provides several options for use suchas cables, wires, lighting, air conditioning systems, etc.

6. Slabs can be left in sight or plastered with standard paneling.7. Recyclable and durable for up to 100 time

form systems

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