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Chapter: Civil - Prefabricated Structures - Prefabricated Components

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Behaviour of Prefabricated structural components

When the modular grid of 100 mm increment is superimposed on a multi-modular grid. building components encourages as far as possible the interchangeable components, whatever the material form or method of manufacture.

Behaviour of structural components

 

Displacement of grid or tartan grids.

 

Where there is a homogenous and repetitive between at least two basic increments. E.g. 1M + 2M (or) 3/2 M + 3M

 

Interrupted grids (or) neutral zones

 

Where there are non modular interruptions of grids, neutral zones are created to cope with the economics of building design.

 

elements in building design

v Continuous grid

v Superimposed grid

v Displacement of grid (or) Tartan grids

v Interrupted grids as neutral zones.

 

Continuous grid

Where all dimensions in either direction are based on one increment only.

 

Superimposed grids

 

When the modular grid of 100 mm increment is superimposed on a multi-modular grid. building components encourages as far as possible the interchangeable components, whatever the material form or method of manufacture.

 

simplifies size operations by rationalizing selling out. Positioning and assembly of building components.

 

ensures dimensional coordination between installations equipment, storage units, other fitted furniture, etc) as well as with the rest of the building.

 

Modular Grid

 

A rectangular coordinate reference system in which the distance between consecutive lines is the basic module or a multimodule. This multimodule may differ for each of the two dimensions of the grid.

 

Types of Modular Grid

 

There are different types of grid patterns which are used to locate the positions and dimensions of building spaces, components and

 

Major Objective

 

The principal object of modular coordinate is to assist the building design, construction professional building industry and its associated manufacturing industries by standardization in such a way that building components fit with each other with other components and with building assembly on site thereby improving the economics of building.

 

Specific Objective

Modular Coordination thus

 

Facilitates cooperation between building designers manufacturers, distributors, contractors and authorities.

 

In the design work, enables buildings to be so dimensionally coordinated that they can be erected with standard components without undue restriction on freedom of design.

 

Permits a flexible type of standardization. Which encourages the use of a number of standardized building components for the construction of different types of buildings.

 

Optimize the number of standard sizes of multimodules will suit particular applications. However, if modular coordination is to be achieves the values of multimodules should not be chosen arbitrary and only standardized multimodules shall be used. By using multimodules, it is possible to achieved a substantial reduction in the number of modular sizes, particularly for components having at least one dimension equal to one of the dimensions of the functional element of which they are a part.

 

A further reduction in the number of modular sizes may be achieved by means of a general series of multimodular sizes based on selected multimodules. The international standardizes values of multimodules for horizontal coordinating dimensions are

3M, 6M, 12M, 80M & 60 M

The multimode 15M may also be used for special applications.

 

Aims of Modular co-ordination.

 

Major objective. Specific objective.

Flexibility in the arrangement of components.

 

The modular coordination is defined as, the basic module is in adopted, the size of which is selected for general application to building and its components. The value of the basic module chosen in 100mm for maximum flexibility and convenience. The symbol used for basic module is M.

 

1M =100mm

 

100 mm = 1M = it is international standard value. Modules

 

Modules is a standard unit of size used to coordinate the dimensions of buildings and components.



Multimodules

 

Multimodules are standardized selected whole multiples of the basic module different single beam has resulted the beam to fall 2 basement down.

 

The beam just placed for connection. Need for prefabrication

 

1.     Prefabricated structures are used for sites, which are not suitable for normal construction method such as hilly region, and also when normal construction material are not easily available.

 

2.     PFS facilities can also be created at near a site as is done to make concrete blocks used in plane of conventional knick.

 

Structures which are used repeatedly and can be standardized such as housing storage sheds godowns, shelters, bus standard security cabins, site offices, fool over bridges, road bridges. Tubular structures, concrete building blocks etc., are prefabricated structures.

 

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