5.2. Soil Movement and House Stability

And also, you know, don’t have too many offsets you know here, this is like too many, so symmetrical but still it’s too many offsets in it but then either try to make more of a defined shape because that is where you can even have a diagonal bracings, you can have some kind of support system so, it will; it is at least bound to a; this plan should be square or rectangular, if it is rectangular then you need to have a kind of intermediate support systems into it.

In constructing buildings, the shape significantly affects stability. A structure with too many offsets (indentations or protrusions) may be less stable than a symmetric design. Ideally, buildings should be square or rectangular as these shapes allow for better diagonal bracing and support systems, which enhance structural integrity. If a building is rectangular, it requires additional intermediate support to maintain stability.

Think of a table with four sturdy legs vs. a table that has wobbly feet sticking out in different directions. The stable table (like a square or rectangular building) can bear more weight without toppling over, whereas the wobbly table (with multiple offsets) is more likely to tip.

Now, asymmetric buildings with empty pockets are more vulnerable to damage because don’t leave these empty pockets, we tried to fill that and that is where these are more stable you know, the symmetric buildings are more stable and also when we say about the row house planning; the row house planning also creates wind tunnel effects because the moment your house is one step to another, next to the shore and then it channels the wind and that is where it can damage the edges of the walls or the corners.

Asymmetrical buildings, which may have unfilled areas (referred to as empty pockets), are more susceptible to environmental damage. In design, it's important to avoid these empty pockets, as they can weaken the structure. Additionally, row house planning, where multiple houses are built in a line, can create wind tunnel effects. This means that strong winds are funneled between the houses, potentially causing damage to walls and corners exposed to the wind.

Imagine a group of people standing in a line on a windy day. If they have gaps between them, the wind blows through these gaps harder, pushing the people in the direction of the wind. Instead, if they stand close together (like a symmetrically designed building), the wind affects them less since there is no space for the wind to intensify.

So, that is where you can even you know, now even the zigzag planning avoid wind tunnel effect right, so how actually, you can actually see about, how you can actually, give a little bit of vastness and then reduce it so, the zigzag pattern as well can have some control, it depends on how you are actually orienting it and similarly, the long phase of the building facing the wind direction.

Zigzag planning can help mitigate wind tunnel effects. By designing buildings in a zigzag pattern, they can better diffuse and redirect the wind rather than allowing it to concentrate and build up speed. How a building is oriented—specifically which side faces prevailing winds—also affects its stability, with longer façades against the wind direction being more vulnerable.

Think of a river flowing around boulders. If the path is straight, the water flows fast and hard. But if there are rocks (like zigzag designs), the water slows down and moves around them more gently, reducing erosion.

In fact, if you ever visit in the coastal villages of Tamil Nadu and the coastal areas; most of the times your short phase is of the building is facing the wind direction and whereas, in horizontal phase because that is where they have less number of openings and either that, if they are facing that side and they will have less number of openings and otherwise, if they mostly they orient so, the whole building pattern is like you have the seashore and you have these.

In coastal regions, buildings are typically oriented such that their shorter side faces the prevailing winds from the sea. This orientation reduces the number of openings on the windward side, thereby minimizing potential damage. This design strategy not only protects the building but also helps maintain air circulation.

Picture a ship cutting through waves. If the ship is broad and faces forward into the waves (like a building facing strong winds), it would take on lots of water. However, if it positions its shorter side to the waves (like a building facing the wind with a short side), it sails more smoothly through the waves.

So, when we say about do not use cement and sand to be less than 1.6 okay, 1:6, so for 1 cement and 6 part of the sand. So, you should not make use of the combination of this mortar not less than 1:6, either it is recommended to use 1 sand, 1 cement and 6 sand or 1 lime with 3 sand or 1 cement, 3 lime and 9 sand, so this is a kind of mortar mixes which normally guidelines do recommend and at the end of the day, all these are coming from the proper IS code but these are only a thumb rules.

Quality of building materials is crucial for stability. There are recommended mixing ratios for mortar in construction. A common guideline suggests not using a mixture with less than a 1:6 ratio of cement to sand. Alternative mixes may include ratios like 1 cement to 3 lime and 9 sand. These guidelines, informed by the Indian Standards (IS code), ensure structural reliability even if they are general recommendations.

Think of baking a cake. If you don’t use the right amounts of flour, sugar, and eggs, your cake might not rise properly. Similarly, using incorrect proportions of materials in construction can lead to weak structures.

So, one has to understand that each state is been sub-categorized by different cultural geographies, which is not only the geography but they also vary with the cultures, the moment culture comes into it, it can talk, it is reflected in the building practices whether it is a type of construction, whether it is an alignment of a house, whether it is the dwelling typology and their belief systems.

Understanding local cultures is essential for appropriate building design and construction techniques. Each region may have specific building practices that reflect their cultural background, including types of materials used, layout of houses, and how buildings are oriented relative to geographical features. These practices are influenced by local beliefs and environmental conditions.

Building a house in a hot climate differs from constructing one in a cold area. In a hot environment, houses might be built with materials that keep them cool, have more openings for airflow, while in colder regions, houses may have thicker walls to insulate heat.

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