Components:  
 
• Panels
• Angles and support
• Formworks for lift
• Climbing brackets
• Supporting cast brackets
• Truss for horizontal supports
• Triangles for ground cast support

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Preform framed formwork
Accessories
Construction drawings
Linear formwork
One-corner formwork
Two- corner formwork
T-shaped formwork
Guide lines
Concrete pressure figures
 
 

Panels

• Frame, made out of a shaped-profile sized for housing plywood panels and jointing vice in any position.
• 2 rod restraints each vertical span, mounted within conical sleeves that enable the installation of
opposed inclined panels, or of panels on staggered levels.
• Transverse beams, made of open-profiles, featuring slots to ensure a safe and quick application of struts, brackets etc.
• Transverse beams, made of jointed Z-Cold formed sectionswith frames featuring holes for tie rods to permit the connection between casings that are not mirror opposites or that lie obliquely from the vertical line.
• Multi-layer panel in birch wood (plywood), 18-mm thickness, phenol coating 250-g/mm2 density, joint to frames with interposed differential-shrinkage sealer.

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Angles and supports

 

 

 

Truss for horizontal supports

Made of 2 open C-profiles, coupled at a distance of 50 mm in order to leave room for (crack) pins, extension cords and shafts, screws and plates, as well as of a wooden stick that facilitates the junction of the plywood covering.

Triangles for ground cast support
It is one of the innovative features of Preform System. Assembled in dimensions 3000 x 1500 mm through pin junctions on the C-beams, they allow constructing ground cast supporting structures from 3 to 6 m high.

Supporting cast brackets
The supporting cast brackets can be easily and safely anchored to the panels’ transverse beams. In fact, thanks to the panels design, it is possible to position the brackets with the same inter-axis of the common metal decks. Due to this, common metal decks usually in stock at worksites can be mounted on the cast brackets with considerable cost savings compared with normal wood scaffolding.

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Formworks for lift

The peculiar part is the platform, which can be moved together with the casings to allow a safer and easier casting in altitude.
The platform consists of main and secondary coupled C-beams; the plywood floor is installed onto the secondary beams. The main beam features at its ends equalizing shoes that fit into the corresponding housings within the casting previously finished. During raising, just for gravity, the shoe sets itself along the vertical axis thus ensuring a safe and easy shift of the whole structure.

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Climbing brackets

Both in basic or shiftable versions, they are made by using the system’s fundamental part, the double-C truss, with an interposed rack-rail shifting device. The concept is strongly innovative, since it combines easy installation with the possibility to build tread floors out of ordinary metal decks thus replacing the traditional and expensive wood scaffolding. Moreover, it allows modifying the bracket geometry depending on the wall inclination thanks to the possibility to shift the strut along the post of the very same bracket.

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