1. Single-row scaffolding calculation
Single-row scaffolding has only one row of columns, which are erected with the help of walls and laid with springboards. The vertical load is borne by the columns and walls.
The calculation rules for single-row scaffolding are as follows;
1.1 The construction body is above 1.2m and below 3m above the ground, and is calculated in square meters according to its vertical projection area (Note: if it exceeds 3m, it is considered as a comprehensive scaffolding);
1.2 Stone embankment bridges and road slope protection (including anchor rods and shotcrete, etc.) are above 1.2m above the ground and are calculated according to the inclined area (shared for masonry and grouting);
1.3 In conjunction with the hoisting of bridges and bridge decks, a single-row scaffolding can be calculated once according to the outer perimeter of the supporting pier body plus 3.6m multiplied by the height;
1.4 When When the height of the building decoration work surface under separate contract is above 1.2m and scaffolding is required, the scaffolding for the masonry, ramming, decoration and interior decoration of the exterior corridors and balconies, corridor columns and independent columns, and the scaffolding for the interior decoration of the exterior walls, if the height exceeds 3.6m, shall be calculated as a single row of scaffolding (within 3.6m, it shall be calculated as a movable scaffolding)
2. Calculation of comprehensive scaffolding
Comprehensive scaffolding is a combination of masonry scaffolding, material transport ramps, loading platforms, metal winch racks, exterior wall painting scaffolding, etc. required for the masonry of interior and exterior walls in buildings. It is a scaffolding used for masonry walls (including exterior painting) of industrial and civil buildings.
2.1 Concrete pouring and masonry of structures with a height of more than 3m shall be calculated in “㎡” according with their vertical projection area (Note: single-row scaffolding is considered below 3m);
2.2 Stone retaining walls with a height of more than 1.2m shall be calculated according to their vertical projection area
2.3 Water towers shall be calculated according to the corresponding sub-items of comprehensive scaffolding;
2.4 The exterior wall adopts a steel skeleton and sealed color steel plate structure, which shall be calculated according to comprehensive scaffolding;
2.5 For projects where the exterior wall of steel structure engineering is not enclosed, the comprehensive scaffolding shall be calculated at 50%.
3. Calculation of full-floor scaffolding
Full-floor scaffolding, also known as full-floor red scaffolding, is a construction process of scaffolding in the horizontal direction. It is mostly used for construction personnel construction channels, etc., and cannot be used as a support system for building structures. Full-floor scaffolding is a high-density scaffolding with a fixed distance between adjacent rods and uniform pressure transmission, so it is also more stable. Full-floor scaffolding is mainly used for the decoration of the top of buildings with large floor height and span, such as single-story factories, exhibition halls, and gymnasiums. It is composed of electric poles, horizontal bars, diagonal braces, scissor braces, etc.
The calculation rules for full-floor scaffolding are as follows:
3.1 When the floor height of the ceiling decoration (including whitewashing) exceeds 3.6m, it is calculated according to the indoor net area. When the height is between 3.6m and 5.2m, it is calculated according to the basic layer of full-floor scaffolding. When it exceeds 5.2m, each additional 1.2m is calculated as an additional layer, and less than 0.6m is not counted. The calculation formula is as follows:
Additional layers of full-floor scaffolding = (floor height – 5.2m) / 1.2m;
3.2 When the ceiling surface is brushed (sprayed) with lime water alone, the floor height is between 5.2m and 10m and is calculated at 50% of the basic layer sub-item of the full-floor scaffolding (no scaffolding cost is calculated for floors below 5.2m);
3.3 The full-floor basic scaffolding is calculated at 50% of the basic layer sub-item of the full-floor scaffolding quota.
There are many other types of scaffolding, such as warehouse surface scaffolding, inner scaffolding erected along indoor walls, independent safety baffles, etc. Although the scaffolding cost accounts for a small proportion of the project cost, it is necessary to follow the principle of strict responsibility and calculate the corresponding project quantity in strict accordance with the design drawings or the actual situation of the project when compiling the cost estimate according to the project quantity calculation rules.
Post time: Jul-16-2025