Important Points SOP (Standard Operating Procedure) During the Inspection of RCC NP4 Pipes

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Important Points SOP (Standard Operating Procedure) During the Inspection of RCC NP4 Pipes: -    Image-Hydro Test (Photo Credit: Ritesh Raj) (1.) Firstly, approved QAP will be checked.  (2.) ID marks should be marked on the inner and outer sides of pipes.  Image-ID Mark (Photo Credit: Ritesh Raj)  (3.) To check the inner and outer diameter of pipes.   (4.) Smooth finishing and before dispatch of RCC pipes cement slurry or grouting where required.   (5.) Load test is required for RCC pipes as per IS codes. It is different for each dia, of RCC pipes.  Image-Plate Load Test (Photo Credit: Ritesh Raj)   (6.) Concrete mix design checked and in which cement content, cement brand, and water-cement ratio should be checked.  (7.) The straightness test to be checked of RCC pipes through the straightness rods to collinear visible.   (8.) As per requirement 2% of hydro tests are to be checked as IS:458 of the total ordered quantity.  Image-Hydro Test (Pressure Release) (Photo Credit: Ritesh Raj)  
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"Description of Formwork"

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A temporary mould which is made from plywood, timber and steel and proper fixed with the help of MS pipe and bamboo and make the area will be too rigid with the help of tie rod or ghughoo nuts is known as formwork. In the formwork concrete is poured or formed.

Formwork with stagging (Photo:Ritesh Raj)


Formwork is prepared by carpenter at construction site with the help of wooden batten and supporting angles which is made by MS plate. A good quality of plywood is used for shuttering. In shuttering used plywood will be water proof, proper thickness, more durable, hard and reusable.

The formwork sides will be proper fixed and it will prevent from leakage of cement slurry. During concreting when we apply vibration through vibrator, it will able to resist it.

Formwork base is known as soffit. The soffit is apply at base of the beam, roof, base of lintels, chajjas .

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Formwork (Photo:Ritesh Raj)



Important points for Formwork:-

     (1.)  Before fixed the formwork the specified area should be neat and clean with the help of water pressure and before it all unwanted material like as sawdust, shavings, chipping particles and rubbish will removed from that area.

     (2.)  For the cost control purpose, we will require to use formwork for its maximum time.

     (3.)  Formwork will be more durable and hard and capable to wear dead load and live loads.

     (4.)  Before using the formwork always use shuttering oil.
Formwork (Photo:Ritesh Raj)

      Also Read:Description of Brick

     (5.)  Before concreting, vertical reference line should be check with the help of plum bob.

     (6.)  During concreting, hammering will apply on all sides of shutting area.

     (7.)  After concreting de shuttering will apply.

     (8.)  After de shutting (ex-Column), all area should will be proper covered with gunny bags/hessian cloth/jute bags/sacks.
Formwork (Photo:Ritesh Raj)


     (9.)  After that curing is apply for their specified time.

     (10.) More time will require for removal of formwork in winter is more than summer season.




Formwork removal time:-

When concrete will achieve their required time and it is proper set and after de shutting no any effect will apply on that structure, it is judged by their formwork removal time.


Sl. No.
Type of Formwork
Min. Period Before Striking Formwork
1
Vertical formwork to columns, walls and beams
16-24 Hours
2
Soffit formwork to slabs (Props to be re fixed immediately after removal of formwork)
3 Days
3
Soffit formwork to beams (Props to be re fixed immediately after removal of formwork)
7 Days
4
Props to slabs:                                                                         

(a.) Spanning up to 4.5 m
7 Days
(b.)Spanning over 4.5 m
14 Days
5
Props to beams and arches

(a.) Spanning up to 6 m
14 Days
(b.)Spanning over 6 m
21 Days
Souce:-IS:456 (Page No.-25, Clause No.-11.3.1)

Formwork  (Photo:Ritesh Raj)

Also Read:Description of Lime

Types of Formwork:-

     (1.)  Timber Formwork

     (2.)  Steel Formwork

     (3.)  Plywood Formwork

     (4.)  Plastic Formwork

Formwork  (Photo:Ritesh Raj)

Note:-

    (1.)  The timber or plywood which will use in formwork will well season and before using shuttering         oil will apply.

    (2.)  The used timber or plywood will light in weight.

    (3.)  The timber will have their smooth surface, neat and clean and no any loose debris was inserted on        it.

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Plastic Formwork:-

New technology introduce us plastic formwork. From the plastic formwork we got more benefits. Some benefits are following:-

(1.) Good Finishing

(2.) Light weight

(3.) Repetitive time use

(4.) More safer than plywood or steel formwork

(5.) Cost Control

(6.) Eco Friendly

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(7.) Low maintenance

(8.) Prevent the environment

(9.) Recyclable

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Also Read:Description of concrete

(10.) Corrosion Resistant

(11.) Easily Deformed

(12.) Water Resistant

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Related IS Codes:-

 (1.) IS:456

 (2.) IS:14687

 (3.) IS:1200


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Written By- 
Ritesh Raj
Email Id-rajritesh.motiharirr@gmail.com

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