Category Social Sciences

Skyscrapers have a frame, usually made of steel or concrete, to support the floors and walls, which are attached to the frame. The frame is rather like the skeleton inside a human body. It is not designed to be completely rigid, but to sway a little in high winds, thus reducing the force of the wind upon the structure.

A skyscraper is a continuously habitable high-rise building that has over 40 floors and is taller than approximately 150 m (492 ft). Historically, the term first referred to buildings with 10 to 20 floors in the 1880s. The definition shifted with advancing construction technology during the 20th century. Skyscrapers may host offices, hotels, residential spaces, and retail spaces. For buildings above a height of 300 m (984 ft), the term supertall skyscrapers can be used, while skyscrapers reaching beyond 600 m (1,969 ft) are classified as megatall skyscraper.

One common feature of skyscrapers is having a steel framework that supports curtain walls. These curtain walls either bear on the framework below or are suspended from the framework above, rather than resting on load-bearing walls of conventional construction. Some early skyscrapers have a steel frame that enables the construction of load-bearing walls taller than of those made of reinforced concrete.

Modern skyscrapers’ walls are not load-bearing, and most skyscrapers are characterized by large surface areas of windows made possible by steel frames and curtain walls. However, skyscrapers can have curtain walls that mimic conventional walls with a small surface area of windows. Modern skyscrapers often have a tubular structure, and are designed to act like a hollow cylinder to resist wind, seismic, and other lateral loads. To appear more slender, allow less wind exposure and transmit more daylight to the ground, many skyscrapers have a design with setbacks, which in some cases is also structurally required.

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Concrete is a mixture of sand, water and cement, a powder made of lime and clay. Far from being a new material, concrete was used by the Romans in the first century AD to build the dome of the Pantheon in Rome.

Concrete is a friend of the environment in all stages of its life span, from raw material production to demolition, making it a natural choice for sustainable home construction. Here are some of the reasons why, according to the Portland Cement Association and the Environmental Council of Concrete Organizations:

Resource efficiency. The predominant raw material for the cement in concrete is limestone, the most abundant mineral on earth. Concrete can also be made with fly ash, slag cement, and silica fume, all waste byproducts from power plants, steel mills, and other manufacturing facilities.

Durability. Concrete builds durable, long-lasting structures that will not rust, rot, or burn. Life spans for concrete building products can be double or triple those of other common building materials.

Thermal mass. Homes built with concrete walls, foundations, and floors are highly energy efficient because they take advantage of concretes inherent thermal massor ability to absorb and retain heat. This means homeowners can significantly cut their heating and cooling bills and install smaller-capacity HVAC equipment.

Reflectivity. Concrete minimizes the effects that produce urban heat islands. Light-colored concrete pavements and roofs absorb less heat and reflect more solar radiation than dark-colored materials, such as asphalt, reducing air conditioning demands in the summer.

Ability to retain storm water. Paved surfaces tend to be impervious and can block natural water infiltration into the soil. This creates an imbalance in the natural ecosystem and leads to problems such as erosion, flash floods, water table depletion, and pollution. Pervious concrete is a special type of structural concrete with a sponge-like network of voids that water passes through readily. When used for driveways, sidewalks, parking lots, and other pavements, pervious concrete can help to retain storm water runoff and replenish local water supplies.

Minimal waste. Concrete can be produced in the quantities needed for each project, reducing waste. After a concrete structure has served its original purpose, the concrete can be crushed and recycled into aggregate for use in new concrete pavements or as backfill or road base.

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An architect’s plans give all the information needed to build the structure shown. The plans show the materials to be used, how they fit together, and all the measurements necessary to complete the building. Plans usually show several elevations (different views) of the structure, including a floor plan and a plan of each side of the building. Nowadays, computers are increasingly used to draw up plans. They can provide lists of the materials and equipment needed as the plans are drawn, and work out costings.

Building plans are the set of drawings which consists of floor plan, site plan, cross sections, elevations, electrical, plumbing and landscape drawings for the ease of construction at site. Drawings are the medium of passing the views and concepts of an architect or designer into reality.

Site plan

Site plan is comprehensive detailed drawing of the building or an apartment representing whole plan of a building. It shows property boundaries and means of access to the site, and nearby structures if they are relevant to the design.

For a construction project, the site plan also needs to show all the services connections like drainage and sewer lines, water supply, electrical and communications cables, exterior lighting etc.

Its a first design that is made for any project before going into detailing process. Drawing up a site plan is a tool for deciding both the site layout and the size and orientation of proposed new buildings.

These drawings should comply with the local development codes, including restrictions on historical sites. It acts as a legal agreement for the permission of construction from the government body. For this, it is required that the site plan is made by a licensed professional like architect, engineer, landscape architect or land surveyor.

Floor Plan

A plan means, top view of any building or object. Floor plan is the most fundamental architectural diagram, a view from above showing the arrangement of spaces in building in the same way as a map, but showing the arrangement at a particular level of a building.

Floor plan view is defined as a vertical orthographic projection of an object on to a horizontal plane cutting through the building. This shows the walls, windows, door and other features such as stairs, fittings and even furniture too.

Cross Section

Geometrically, a cross section is a horizontal orthographic projection of a building on to a vertical plane cutting through the building. Cross section is vertical cut section of any building which shows the details of dimension, thickness of any component of a building. It also represents the sill height, lintel height, floor height and other minute details of a structure.

The section plane where the plan is vertically cut is represented in the 2d floor plan by a bold dotted straight line.

Elevation

An elevation drawing is an orthographic projection drawing that shows one side of the house. The purpose of an elevation drawing is to show the finished appearance of a given side of the house and furnish vertical height dimensions. Majorly it is divided into 3 types.

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When prehistoric peoples began to farm, they built settlements. However, some peoples preferred to continue to move about in search of food, following a nomadic lifestyle. Nomads do not need settled homes, but they do need shelter from the weather, so many of them carry tents made of skins or woven fabric. Tents are light to carry and can be put up very quickly.

In the modern world, we live in sedentary, or non-mobile, societies. That’s what we’re used to. However, that lifestyle didn’t become widely available until the late Stone Age, a period called the Neolithic (literally meaning New Stone Age), as the Ice Age ended around 10,000 BCE. For the roughly 190,000 years of human existence prior to that, within the period called the Paleolithic (Old Stone Age), all human societies were nomadic. This means that they did not have permanent addresses or build permanent structures. They traveled throughout the year, moving with their food supplies and available resources.

Nomadism seems like a pretty simple concept, but we’ve seen throughout history that there are actually a number of different ways to be nomadic. Some nomadic people seem to have relied heavily on large herds of animals like bison, following the herds wherever they roamed and hunting for survival. Others, including many around the Mediterranean Sea, seem to have moved around based, at least in part, on when various plant resources became available, traveling throughout the region as various natural fruits, seeds, and grains came into season.

Other societies of this time may have been only semi-nomadic, which means they maintained a semi-permanent residence for part of the year (generally one season or less). There seems to have been two factors which made this possible. For one, semi-nomadic groups had to have a place that could provide steady resources for an extended period of time. Perhaps the best example of this is a large river where fish migrate during a particular time of year. Tribes could camp by the river and harvest fish for weeks, preserving the meat so that it would last.

The second factor is harsh climatic conditions. It’s important to remember that Paleolithic people were living in the Ice Age. Winters were rough, and it seems likely that many of the cave dwellings we’ve found were occupied for weeks or months at a time. People used the caves for shelter during rough winter months, during which many herds of animals weren’t moving around too much, and waited until spring to start roaming again.

Nomadic people did not farm for food but acquired it as they traveled. We call this a hunter-gatherer economy, which is exactly what the name implies. They hunted for food and gathered other resources as they became available. Both of these required an interesting amount of balance. Nomadic people lived on the move and didn’t have permanent storage facilities (like attics or pantries). Because of this, they couldn’t simply gather all the food and resources they found. They could only gather that which they could carry.

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