First, the calculation rules of scaffolding:
1. When calculating the internal and external wall scaffolding, the area occupied by door and window openings, empty circle openings, etc. does not need to be deducted.
2. If the height of the same building is different, remember to calculate it separately according to different heights.
3. If the scope of the project contracted by the general contractor does not include the exterior wall decoration project or the exterior wall decoration cannot be constructed using the main construction scaffolding, the main external scaffolding or decorative external scaffolding project can be applied separately.
Second, external scaffolding
1. The height of the external wall scaffolding is calculated from the designed outdoor floor to the eaves (or parapet top). The project volume is calculated in square meters according to the length of the outer edge of the exterior wall (wall buttresses with a protruding wall width greater than 240mm, etc., are calculated according to the dimensions shown in the figure and included in the length of the exterior wall) multiplied by the height.
2. For masonry heights below 15m, the calculation is based on single-row scaffolding; for heights above 15m or less than 15m, but the exterior wall doors, windows and decoration area exceeds 60% of the exterior wall surface area (or the exterior wall is a cast-in-place concrete wall or lightweight block wall), the calculation is based on double-row scaffolding; for building heights exceeding 30m, the calculation can be based on double-row scaffolding of the steel cantilever platform according to the project conditions.
3. Independent columns (cast-in-place concrete frame columns) are calculated by adding 3.6m to the outer perimeter of the column structure shown in the diagram, multiplied by the designed column height in square meters, and the single-row external scaffolding project is applied. For cast-in-place concrete beams and walls, the calculation is based on the height between the designed outdoor floor or the upper surface of the floor slab and the bottom of the floor slab, multiplied by the net length of the beam and wall in square meters, and the double-row external scaffolding project is applied.
4. The steel platform cantilever steel pipe frame is calculated by multiplying the length of the outer edge of the exterior wall by the designed height in square meters. The quota for the width of the platform overhang has been comprehensively determined, and it will be applied according to the setting height of the quota items when used.
Third, internal scaffolding
1. For the internal wall scaffolding of a building, when the height from the designed indoor floor to the lower surface of the top plate (or 1/2 of the gable height) is less than 3.6m (non-lightweight block wall), it shall be calculated as a single row of internal scaffolding; when the height exceeds 3.6m and is less than 6m, it shall be calculated as a double row of internal scaffolding.
2. The internal scaffolding is calculated according to the vertical projection area of the wall surface, and the internal scaffolding items are applied. Various lightweight block walls that cannot leave scaffolding holes on the internal walls shall apply the double row of internal scaffolding items.
Post time: Jan-02-2025