Posted by : Saurabh Gupta Monday, May 8, 2017

Constain's V Plate System of Prefabrication Construction 


  • Definition
  • V Plate Systems in Nature
  • The Principle of Folding
  • The Basic concept of Folding
  • Structural Behavior of constain's V Plate
  • Types of  V PlateStructure
  • The Application of V Plate Structures
  • Advantages and Disadvantages of V-Plate Structure
  • Some Real Life Examples of V Plate Structure

Constain's V Plate/Folded plates are assemblies of flat plates rigidly connected together along their edges in such a way that the structural system capable of carrying loads without the need for additional supporting beams along mutual edges.

Engineer Eudene Freyssinet performed the first roof with the folded structure in 1923 as an aircraft hangar at Orly Airport in Paris.

Folding Systems in Nature
The principle of folding as a tool to develop a general structural shape has been known for a long time. Folded structure systems which are analogous to several biological systems such as found at broad leaf-tree leaves, petals and foldable insect wings, are adopted to be employed in a new, technical way.

The Principle of V-Plate Construction

The structural characteristics of folding structures depend on-
  • The pattern of the folding.
  • Their geometrical basic shape.
  • Its material.
  • The connection of the different folding planes.
  • The design of the bearings.

Structural Behavior of Folding

Load Distribution process :
  • At first, the external forces are transferred to the shorter edge of one folding element.
  • There, the reaction as an axial force is divided between the adjacent elements.
  • Then the forces transferred to the bearings.

Types of V Plate Structure 
Based on geometric shape folded structures can be divided into:
  • V plate surfaces structures
  • V plate frames structures
  • Spatial V plate structures

Classification of V plate structures based on the material they are made of:
  • V Plate structures made of reinforced concrete
  • Metal V plate structures
  • V Plate structures of wood
  • V Platestructures of glass
  • V plate structures of plastic materials
  • V plate constructions made in combination of different materials
Advantages and Disadvantages of Constain's V-Plate Structure

  • Very light form of construction. To span 30 m shell thickness required is 60 mm only.
  • The use of concrete as a building material reduces both materials cost and a construction cost.
  • Longer span can be provided. 
  • Flat shapes by choosing certain arched shapes.
  • Esthetically it looks good over other forms of construction.
  • Shuttering is difficult.
  • Greater accuracy in formwork is required.
  • Good labor and supervision necessary.
  • Rise of roof may be a disadvantage.

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