Posted by : Saurabh Gupta Sunday, May 7, 2017

HOW PREFABRICATION ?


PREFABRICATION: IS CODES
As in India there is no specific IS code but following can be used for prefabrication construction  


  • IS 15916: Precast Construction
  • IS 875: Design Loads
  • IS 456: Concrete
  • IS 1893 and IS 13920: Seismic Design

Aspects to be considered as per the Recommendation of IS: 15916: 2011
  1. 1  Effective utilization of spaces
    2  Straight and simple walling scheme
    3  Limited sizes and numbers of components
    4  Limited opening in bearing walls
    5  Regulated locations of partitions
    6  Standardized service and stair units
    7  Limited sizes of doors and windows with regulated positions
    8  Structural clarity and efficiency
    9  Suitability for adoption in low rise and high rise building
    10  Ease of manufacturing, storing and transporting
    11  Speed and ease of erection and
    12  Simple jointing system

Types of Precast System according to IS: 15916: 2011

National Building Code of INDIA
Part 6 Structural Design
Section 7, System Building & mixed composite construction: 7A Prefabricated concrete 

Section 7, System Building & mixed composite construction: 7B System Building and mixed composite construction.
SCOPE:
This sub-section gives recommendations regarding modular planning, component sizes, prefabrication systems, design considerations, joints and manufacture, storage, transport and erection of prefabricated concrete elements for use in buildings and such related requirements for prefabricated concrete
1 SCOPE
2 TERMINOLOGY
3 MATERIALS, PLANS AND SPECIFICATIONS
4 MODULAR CO-ORDINATION, ARCHITECTURAL
TREATMENT AND FINISHES
5 COMPONENTS
6 PREFABRICATION SYSTEMS AND STRUCTURAL SCHEMES
7 JOINTS
8 TESTS FOR COMPONENTS/STRUCTURES
9 MANUFACTURE, STORAGE, TRANSPORT AND ERECTION
OF PRECAST ELEMENTS
10 EQUIPMENT
11 PREFABRICATED STRUCTURAL
UNITS
Material Requirement

Easy availability;
Light weight for easy handling and transport;
Thermal insulation property;
Easy workability;
Durability;
Non-combustibility;
Sound insulation;
Economy; and
Any other special requirement in a particular application

Plans and Specification
Such drawings shall describe the elements and the structure and assembly including all required data of physical properties of component materials. Material specification, age of concrete for demoulding, casting/erection tolerance and type of curing to be followed.

Details of connecting joints of prefabricates shall be given to an enlarged scale.

Site or shop location of services, such as installation of piping, wiring or other
accessories integral with the total scheme shall be shown separately.

Data sheet indicating the location of the inserts and acceptable tolerances for supporting the prefabricate during erection, location and position of doors/windows/ventilators, etc, if any.

The drawings shall also clearly indicate location of handling arrangements for lifting
and handling the prefabricated elements. Sequence of erection with critical checkpoints and measures to avoid stability failure during construction stage of the building

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