Prefabricated Column

Precast/Prefabricated Column Construction Details
Construction Technique,

1. PREFABRICATED COLUMNS ANEES KHAN MAHIMA HARIT KUMUD HARIT AKANKSHA SHARMA HIMANSHI KICHLU AIT-SAP Gr.Noida

2. PREFABRICATED COLUMN Prefabrication  is the practice of assembling components of a structure in a factory or other manufacturing site, and transporting complete assemblies or sub-assemblies to the construction site where the structure is to be located. Prefabricated construction is a new technique and is desirable for large scale projects. Precast concrete columns may be single or double storey height Prefabricated components BEAMS COLUMN WALL STAIRS SLAB LINTELS SUNSHADE Prefabrication:-

3. PREFABRICATED COLUMN BASED ON USES Edge Column :- It can Support 3 Beams Internal column :- It can Support 4 Beams Corner column :- It can Support 2 Beams

4. PREFABRICATED COLUMNS:- Precast concrete columns are modular in design in order to be made into different heights. Precast columns can be produced as either single storey corbel column or Multi-storey corbel column. Widths are 300mm, 450mm,600mm. Columns can either be rectangular or circular in sections. Projecting rebar can be provided for tying into in-situ floors. Options for foundation connection include cast in base plates, dowel tubes or Projections.

5. COLUMN TO FOUNDATION CONNECTION

6. CONNECTIONS – COLUMN TO FOUNDATION

7. BEAM TO COLUMN CONNECTION

8. Precast column anchoring systems, as their name suggests are used to connect the base or head of the column to either the next column segment or to its foundation. The system is composed of two main components: 1.Anchor Bolts 2.Column Shoes The anchor bolts seen in the, are cast into either the foundation if a connection between column and pad foundation is required; or into the column head if a connection between columns is required. The column shoes, below are cast into the base of the precast columns. The shoe in anchored into the column via the steel rods embedded into the concrete which are in turn welded to the shoe. CONNECTIONS

9. Advantages:- Saving in cost material, time and man power. Shuttering and scaffolding is not necessary. Installations of building services can be done immediately. Independent of weather condition. Components produced at closed supervision, so quality is good. Clean and dry work at site. Possibility of alterations and reused. Correct shape and dimensions and sharp edges are maintained’ Very thin sections can be entirely precast with precision. Disadvantages :- Handling and transportation may cause breakages of members during the transit and extra provision is to be made. Difficulty in connecting precast unit so as to produce same effect as monolithic. This leads to non-monolithic construction. they are to be exactly placed in position, otherwise the loads coming on that are likely to bit change and member may be affected. high transport cost. need of erection equipment. skilled labour and supervision as required.

10. On average, ten major operations are involved in the production of precast concrete components. These operations are: STEP 1: installation of side moulds. STEP 2: measuring and marking the position of the embedded iron component. STEP 3: install the reinforcement in the components. STEP 4: installation of the embedded parts, according to position. STEP 5: confirming that the side mold , reinforcement, and other embedded parts are deployed in their correct positions and that the dimensions of all components are correct. STEP 6: pouring concrete into a mould, which is then vibrated. STEP 7: plastering to smooth up rough places on the component. STEP 8: components are then cured. STEP 9: removing the molds . Then the component can be transited to the stock yard. STEP 10: removing any residual concrete from molds . Buffers exist between workstations, and this is where semi-finished concrete components are stored. Each precast component is moved from one workstation to the next by means of the delivery system PRECAST CONCRETE COMPONENT MANUFACTURING

11. MANUFACTURE PROCESS installation of side moulds. install the reinforcement in the components.

12. pouring concrete into a mould, which is then vibrated.