All about civil construction knowledge- PARAM VISIONS

Extending brick wall from the existing wall surface / Extension procedure for the brick wall.

When there is toothing for the existing brick wall, then it is a lot easier for us to carry out further construction work. The problem arises when there are no joints to provide bonding between the new wall and the existing wall. 

Toothed wall end.

Here, we will discuss different methods by which we can extend a new wall from the existing wall with proper bonding strength.

 First, we will check out the different types of materials that are available in the market to do this job.

1. Wall starter connector:

 They are made of stainless steel material with the toothing jaw placed at 225mm center to center. You have to bolt or screw the connector to the existing wall as shown in the fig. below.

Wall starter connector.

2.  Wall starter screw ties:

Wall screw tie.

Wall starter anchor tie.

They can be plugged at the required course individually, to provide bonding between the two wall junctions. These ties are available in different curved shapes and sizes.

plugging the screw tie.

 The advantage is, you can screw them according to your brick course layer.

Now we will observe other conventional ways you can follow in a situation, where starter connectors are not available in your locality.

1.   Chiselling/Machine cutting:

Cutting wall with a machine.

Chiseling or cutting the existing wall with the machine or by hand tools helps in setting the bond between the two walls. Cut the wall surface at least 50mm. in-depth with an undulated and rough surface to achieve a good tie at the meetup point.

Cutting depth.

2.   Insert steel rods :

 Steel bars of 8mm dia. should be hammered in the existing wall as shown in fig. The vertical distance between the two rods should be 9 inches, or at the level of every brick course. In any case, the gap between the rod inserted should not be more than 18 inches or an alternate brick course. The other end of the rod should be L-bend with at least 3 inches in length. Insert the rod with the anchor length of at least 1/3rd the existing wall thickness. The outer bar length of 10 inches from the wall surface is sufficient to provide a good tie-up strength. 

8mm bar anchored in the wall.

3.   Clamping the wall:

If the wall is for the partition purpose, and if the live load over the constructing wall is minimal, then you can get the required tie strength by fixing the door clamps to the existing wall.

Door clamp.

 Fix at least one clamp for the alternate course or on the better side provide one clamp for each layer of the brick masonry.

4.   Nailing the wall:

Screwing the wall.

If the extending wall is a single brick partition wall of 4-inch thickness, without any live loads, then you can hammer or screw a plumbing nail at every brick course. The length of the nail or screw should be at least 5-6 inches in length, with the provision of a 3-inch anchorage for the new extension wall.

Thank you for looking into this article😃.  

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