1. Calculation of single-row scaffolding: 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 of 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 lifting 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 the height of the building decoration work surface under a separate contract is above 1.2m and scaffolding is required, the scaffolding for the masonry, ramming, decoration, and inner decoration of the outer walls of the outer corridors and balconies, corridor columns, and independent columns, and the scaffolding for the inner decoration of the outer walls, with a height exceeding 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, and exterior wall painting scaffolding required for the masonry of the inner and outer walls of the building. It is a scaffolding used for masonry walls (including external painting) of industrial and civil buildings. The “Guangdong Provincial Municipal Engineering Comprehensive Quota (2018)” clearly states that comprehensive scaffolding includes scaffolding, flat bridges, inclined bridges, platforms, guardrails, footboards, safety nets, etc. According to the characteristics of housing construction, the Comprehensive Quota of Housing Construction and Decoration Engineering in Guangdong Province (2019) adds another explanation: high-rise scaffolding from 50.5m to 200.5m also includes bracket and tie rod costs.
The calculation rules for comprehensive scaffolding are as follows:
2.1 Concrete pouring and masonry of structures with a height of more than 3m are calculated in square meters according to their vertical projection area (Note: 3m or less are considered as single-row scaffolding);
2.2 Stone retaining walls with a height of more than 1.2m are calculated according to their vertical projection area;
2.3 Water towers are applied with corresponding sub-items of comprehensive scaffolding;
2.4 The exterior wall adopts a steel frame sealed color steel plate structure, which is calculated according to the comprehensive scaffolding;
2.5 For projects where the exterior walls of steel structure projects are not enclosed, the comprehensive scaffolding is calculated at 50%.
3. Calculation of full-floor scaffolding
Full-floor scaffolding, also known as full-floor red scaffolding, is a construction process that fully spreads scaffolding in the horizontal direction. It is mostly used for construction personnel construction passages, 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 decoration construction on the top of buildings with large floor heights and bays such as single-story factories, exhibition halls, and gymnasiums. It consists of vertical poles, horizontal poles, diagonal braces, scissor braces, etc.
Full-floor The calculation rules for scaffolding are as follows:
3.1 When the floor height of 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: the additional layer of full-floor scaffolding -5.2m)/1.2m;
3.2 When the ceiling surface is brushed (sprayed) with lime water alone, the floor height between 5.2m and 10m is calculated according to 50% of the basic layer of full-floor scaffolding (scaffolding costs are not calculated for those below 5.2m);
3.3 The full-floor basic scaffolding is calculated using 50% of the full-floor scaffolding basic layer quota. There are many other types of scaffolding, such as warehouse surface scaffolding, interior scaffolding along indoor walls, independent safety baffles, etc. Although the scaffolding cost accounts for a small proportion of the project cost: by the principle of rigorous responsibility, when compiling the cost estimate, the corresponding project quantity should be calculated strictly according to the design drawings or the actual situation of the project and the project quantity calculation rules.
Post time: Jan-22-2025