What Is Building Sectioning? Types of Sectional Views | Section Lining | Full Section & Half Section
What Is Building Sectioning? Types of Sectional Views | Section Lining | Full Section ,Half Section
What Is Building Sectioning?
Building sectioning is the process of creating a drawing of how a building will look or appears when chopped and split in two along an imaginary plane. The process is used by architects to prepare sections of a building for construction.
A building section, a section drawing, a section, or a sectional drawing is known by many various titles but, in essence, it depicts the structure of a building in such a manner that it appears to have been chopped and split in two along an imaginary plane.
Plan drawings are one of the forms of building sections that have been sliced through by a horizontal plane rather than a vertical plane and depict features accordingly.
This can be beneficial for buildings since it provides a perspective into the spaces and surrounding structures (usually across a vertical plane) that might highlight linkages between the various components of the building that may not be visible on plan drawings.
Plan drawings are a sort of section, except they cut through the structure on a horizontal plane rather than a vertical one.
On plan drawings and elevations, the direction of the plane through which the section is cut is frequently indicated by a line of long and short dashes called a section plane.
If there are several sections, the line may include letters at each end indicating the name of the part drawing and an arrow indicating the viewer’s direction.
The section line can follow an indirect route through a structure if it helps emphasize the most essential features or connections.
The most common type of construction plan is a floorplan, which is a bird’s-eye perspective of a structure with all of its parts set out on a horizontal plane.
A section, on the other hand, provides a vertical view, which is as important.
The surface exposed by the cutting plane is indicated by section lining, which may be found on most sectional views. Because it was not altered by sectioning, the square hole in the item has no section lining.
Different types of section lining are used to distinguish various materials. When an object is constructed of many materials, a variety of section line symbols aids in material identification.
Importance and Purposes of Building Sectioning?
A section view gives architects and constructors another method to understand how a building will hold up, as it exposes information about the construction of walls as well as the thickness and height of beams and other supports.
A floor plan indicates how the walls are positioned in relation to one other, whereas a section shows where the wall meets the floor and the distance that divides one floor from another.
Furthermore, sections give a clearer idea of how a building’s spaces will support its future residents, such as whether the ceiling will overhang or leap overhead.
Types of Sectional Views
1. Full Sections
The most common section is the whole section, which has an imagined laser cutting a line across the entire construction, allowing for a view of only a piece of the building while leaving the remainder to one side.
When a cutting plane line completely cuts through an item, the resulting section is referred to as a full section.
To create a full section, the cutting plane must go all the way through the item. In many situations, this is used to prevent having to dimension concealed lines.
2. Offset Sections
Oftentimes, the cutting plane does not follow a straight line. This might be utilized, for example, when the architect or engineer intended to display a part of one room as well as a piece of another that is placed behind it.
In other words, even when the cutting planes are parallel, the plane in one section of the design may be offset from the plane in another.
3. Half Sections
A half-section reveals the inside of one half of an object while concealing the exterior of the other. Half sections are commonly utilized for symmetrical items or assembly drawings.
The two sections are separated by a centerline. On each half, no hidden lines should be visible.
The resultant section is a half section if the cutting plane is passed halfway through an item and one-quarter of the object is eliminated.
The advantage of a half section is that it shows both interior and exterior layouts.
It is commonly used to describe symmetrical things. Hidden lines are often not displayed on the un-sectioned half unless they are required for clarity or dimensioning.
The cutting plane takes precedence over the central line, as it does in all sectional designs.
4. Broken-Out Sections
For most situations, just a tiny portion of a view has to be sectioned to display interior information. A freehand break line is used to delete the broken-out part in the picture below.
A cutting plane line is not required because the position of the cut is apparent.
5. Revolved Sections
A revolving view is useful for extended items or sections of elongated things. The cross-sectional form of the object’s ribs, spokes, and other projections is highlighted in this perspective.
The cutting plane cuts the item at an angle, but the drawing is turned for the observer’s benefit.
A revolved section depicts an object’s form by turning a part 90 degrees to face the observer.
6. Removed Sections
A “removed” section is one that has been relocated from its regular predicted location in the standard view arrangement.
SECTION A-A, SECTION B-B, and so on, correspond to the letter designations at the ends of the cutting plane line. Removed portions may be partial sections, and they are frequently drawn to a different scale.
Designers use section view when space on the layout sheet is restricted. It is not in orthographic projection of any other view.
Building Sectioning FAQs
What is a section view drawing?
A section view drawing is a drawing produced after the construction of a building to show how it will appear when it is cut in two. These are usually produced on-site by engineers, architects, or builders to help with their plans.
The section view drawings can be used for floor plans, elevations, or more
What is the use of a sectional view in a drawing?
The sectional view is used for picturing how an object would look if cut by another imaginary plane. It’s used in many different fields, like architecture, mechanical engineering, civil engineering.
In technical drawing, sectional views are used to show interior surfaces. They are used to provide extra orthographic views of surfaces that are obscured in the usual front, top, and side orthographic views.
What are some types of sectional views?
Sectional views can be classified in many ways, including:
· Full sections
· Half sections
· Broken out sections
· Revolved sections
· Offset sections
· Removed sections