Guidelines for the Installation Requirements and Application Scenarios of Single Row and Double Row Scaffolding

2025-08-29 15:21:01

Scaffolding is an indispensable temporary support structure in the construction and construction process. According to the different construction methods, scaffolding can be divided into two types: single row and double row. This article will explore in detail the key points of setting up these two types of scaffolding and their respective applicable contexts to help readers better understand and apply them.

1. The base elevation of the scaffold bottom should be appropriate, and it is recommended to be 50-100 millimeters higher than the natural floor to ensure stability and safety.

2. Single row scaffolding, which consists of only one row of uprights, with one end of its short horizontal bar resting on the wall, is suitable for lightweight projects such as interior wall plastering and painting.

Double row scaffolding consists of two rows of vertical and horizontal poles inside and outside, as well as longitudinal and transverse horizontal poles, making the structure more stable. It is commonly used in masonry projects and can withstand the stacking of heavy objects such as cement and bricks.

The horizontal bars of a single row scaffold should be set to avoid the following positions:

When setting the horizontal bars of a single row scaffold, special attention should be paid to the following positions to avoid possible safety hazards:

① It is explicitly stipulated in the design that there shall be no position left for the eyes of the feet;

② Within the triangular area of the beam and its two ends forming a 60 ° angle, as well as within 1/2 of the net span of the beam;

③ Window walls with a width of less than 1 meter;

④ A wall with a thickness of 120mm, a plain stone wall, and independent columns;

⑤ Within a range of 500mm below and to the left and right of the beam or beam pad;

⑥ Within a range of 200mm on both sides of brick masonry door and window openings (300mm for stone masonry) and 450mm at corners (600mm for stone masonry);

⑦ Walls constructed using lightweight materials such as independent or attached brick columns, hollow brick walls, and aerated block walls;

⑧ Brick walls with a strength grade of less than or equal to M2.5 for masonry mortar.

3. The erection of scaffolding must be coordinated with the construction progress

The height of each installation should not exceed the range of two steps above the adjacent wall connecting components.

4. Vertical horizontal bar, usually referred to as a large horizontal bar

Its setting should be located on the inner side of the pole, and its length must cover at least 3 spans.

Regular inspections are essential to ensure the safe use of scaffolding. Inspection work needs to be carried out before the foundation is completed and the framework is erected to ensure the stability of the initial state. As the installation height increases, an inspection should be conducted every 6-8 meters to monitor the stability of the structure. Before applying loads on the work layer, a detailed inspection must be conducted to ensure that the bearing capacity meets the requirements. At the same time, comprehensive inspections are required in adverse weather conditions such as strong winds of level 6 or above, heavy rain, or freeze-thaw cycles, as well as after reaching the design height. In addition, scaffolding that has been out of use for more than one month must undergo pre inspection and acceptance before being reused to ensure its safety. Through these regular inspection measures, potential problems during the use of scaffolding can be identified and addressed in a timely manner, ensuring construction safety and efficiency.

1) Check whether the setting and connection of the members are stable, and whether the wall connecting members, supports, and door trusses meet the requirements of the specifications.

2) Confirm that there is no water accumulation in the foundation, the base is stable and not loose, the upright pole is not suspended, and the fasteners and bolts are tightened without looseness.

3) For double row scaffolding over 24 meters and full support frames over 20 meters in height, special attention should be paid to whether the settlement and verticality of the poles meet the standards.

4) Carefully check whether the safety protection measures are complete and ensure that there are no omissions.

5) Finally, it is necessary to verify the load capacity to ensure that the scaffold is not overloaded for use.