Ever thought about how the builders work safely even at great heights? It all has to do with scaffolding. These scaffolds support and hold metal and wooden frames for the workers. There are different types of scaffolding, where single scaffolding stands out for its simplicity and wider applications. This blog will talk about some reasons behind single scaffolding and why it is still of utmost importance in construction work.
What is Single Scaffolding?
Single scaffolding, or bricklayer’s scaffolding, is an important type of scaffold for brick masonry work and consists of one simple row of standards connected by ledgers and putlogs directly inserted into the holes in the walls. It is placed approximately 1.2 meters away from the wall for easy access to the masonry works. It is most suitable for brickwork because the putlogs can be mounted directly on the brick wall.
The main advantages of single scaffolding are that it is simple and less expensive; however, it is less stable than double scaffolding, and it is now completely dependent on the wall, which can sometimes be a limitation in certain construction cases.
Components of Single Scaffolding
- Vertical Poles / Standards: These are vertical poles that are erected at regular intervals along the direction of the wall to provide necessary structural support.
- Horizontal Poles / Ledgers: These are horizontal elements that connect all the standards to maintain the stability of the structure.
- Shorter Tubes (Putlogs): These are short horizontal tubes placed between the standards that support the temporary working platform.
- Base Plates: These are plates that are placed at the base of each standard to ensure the weight is evenly distributed and prevent standards from sinking into the ground.
- Braces: These are diagonal supports that are used to stabilise the scaffolding and prevent swaying.
Where is Single Scaffolding Used?
Brick Masonry
Single scaffolding is typical for brick masonry as the putlogs rest in the building walls. This platform is stable for workers for bricklaying, plastering, or painting. As bricks support the putlogs, it is a great option for constructing walls with bricks or similar materials.
Low-Rise Buildings
Single scaffolding is suitable for low rise buildings, particularly up to 15 meters high. The design of single scaffolding requires support from the wall, so it can adequately sustain the weight of the scaffolding for lower structures. Higher buildings will normally require more robust scaffolds, like double scaffolding for added strength.
Uneven Surfaces
Single scaffolding can be adjusted to make scaffolds work comfortably on uneven or sloped surfaces. The adaptiveness of the scaffolding to the imperfection of the ground or the structure makes it usable for projects, where heavier types of scaffolding are not necessary.
Smaller, Less Complex Projects
Single scaffolding is usually the best option for smaller or less complex projects. It is quick and easy to install. They are suitable for projects of quick repairs on small buildings or renovation jobs. These days it is an affordable and easy solution for building contractors on projects that do not need heavy high-tech scaffolding systems.
Exterior Maintenance
Exterior maintenance tends to incorporate single scaffolding for cleaning, painting or repairing the outer walls of buildings. It enables easy access to high points of a building without getting into very complicated and costly systems of scaffolding.
Advantages of Singles Scaffolding
- The single scaffolding is lighter and easier to erect, and it is easy to dismantle since its components are fewer than in double scaffolding.
- It is very simple and less complicated by straight design; installation is therefore much easier. This saves time and the charges incurred in skilled labour.
- It erects only one row of standard, hinging on the wall support; this is less on material cost.
- Occupies less space compared to other scaffolding systems around the building, which is vital in a congested area.
Step-by-Step Installation of Single Scaffolding
Site Assessment
Examine the area where the scaffolding needs to be installed. Ensure that the surface is stable and level to avoid collapsing. Check the wall to ensure that it can support or withstand the weight of the scaffold.
Setting the Base
Place the base plates at regular intervals along the surface of the wall, where the scaffolding needs to be installed. Ensure that the plates are level and aligned properly.
Erecting Standards
The standards or vertical poles are erected at the designated location at equal intervals. Ensure that the space between the poles is even and the poles are securely anchored into the base plates.
Installing Horizontal Ledgers
After the standards are erected, the horizontal ledgers are connected between the vertical poles to create a grid-like framework. This provides necessary support to the vertical poles to stand still, and helps in the uniform distribution of loads.
Positioning Putlogs
Place the putlogs horizontally between the ledgers to create a solid and secure platform for workers. Ensure that the putlogs are securely positioned and properly aligned with the ledgers, creating a safe platform for working.
Constructing Platforms
Lay the wooden planks or other materials on the putlogs to form the work platform for carrying out their tasks. Ensure that the platform is sturdy, level, and securely fixed to prevent accidents.
Securing Scaffold
Add braces or diagonal supports between the vertical poles to enhance the stability of the scaffolding. Secure the scaffold by tying it securely to the building to prevent movement and potential collapse.
Single Scaffolding vs Double Scaffolding
| Feature | Single Scaffolding | Double Scaffolding |
| Structure | One row of vertical poles (standards) is attached to the building wall, with horizontal ledgers and putlogs. | Two parallel rows of vertical poles (standards), provide independent support. |
| Use | Bricklaying, plastering, and external maintenance of low-rise buildings. | Used for stone masonry, where the most robust scaffolding is required, and putlogs cannot be inserted into the walls. |
| Stability | Less stable, as it relies on the building wall for support. | More stable due to the independent support structure from both rows of standards. |
| Cost | More affordable due to its simpler design and fewer materials. | More expensive due to additional materials and a more complex design. |
| Installation Complexity | Easier and quicker to install. | More complex and time-consuming to set up. |
| Height of Use | Suitable for low-rise buildings (up to 15 meters). | Suitable for taller buildings or those with stone masonry. |
| Support | Relies on the building wall for support, with putlogs extending from the wall. | Provides self-support, no reliance on the wall. |
| Safety | Less secure compared to double scaffolding, especially for taller structures. | Provides greater safety and stability, especially for higher or more challenging projects. |
Conclusion
Single scaffolding is a widely accepted and practical option for brick masonry in low-rise buildings. It possesses many advantages pertaining to its simple design, economic viability and easy assembly. However, for heavier purposes or stone masonry, the choice is double scaffolding. Since safety is paramount, regular inspection of the scaffolding should take place to secure it throughout the project, irrespective of the system adopted.
Apoorva H P Achar