1. Calculation rules
(1) When calculating the internal and external wall scaffolding, the area occupied by door and window openings, empty circle openings, etc. shall not be deducted.
(2) When the height of the same building is different, it should be calculated separately according to different heights.
(3) For projects where the general contractor does not include exterior wall decoration projects or the exterior wall decoration cannot be constructed using the main construction scaffolding, the main external scaffolding or decorative external scaffolding projects can be applied separately.
2. External scaffolding
(1) The height of the building’s external wall scaffolding is calculated from the designed outdoor floor to the opening (or parapet top): the project volume is calculated in square meters based on the length of the external edge of the external wall (for wall buttresses with a protruding wall width greater than 240mm, the calculation is based on the dimensions shown in the figure and included in the external wall length) 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. When the building height exceeds 30m, it can be calculated based on double-row scaffolding on a steel cantilever platform according to the project conditions.
(3) For independent columns (cast-in-place concrete frame columns), the calculation is based on the outer perimeter of the column structure shown in the diagram plus 3.6m, 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 from the designed outdoor floor or the upper surface of the floor slab to the bottom of the floor slab, multiplied by the net length of the beam or wall in square meters, and the double-row external scaffolding project is applied.
(4) For steel pipe frames on steel platforms, the calculation is based on the length of the outer edge of the exterior wall multiplied by the designed height in square meters. The quota for the width of the platform projection has been comprehensively determined. When in use, it shall be applied according to the setting height of the quota items.
3. 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 shall be calculated according to the vertical projection area of the wall surface and the internal scaffolding item shall be applied. Various lightweight block walls that do not leave scaffolding holes on the internal walls shall be applied with a double row of internal scaffolding items.
4. Decorative scaffolding
(1) When the original masonry scaffolding cannot be used for the decoration of the internal wall with a height exceeding 3.6m, the decorative scaffolding can be calculated according to the internal scaffolding calculation rules. The decorative scaffolding shall be calculated by multiplying the double row of internal scaffolding by a coefficient of 0.3.
(2) When the indoor ceiling decoration surface is more than 3.6m away from the designed indoor floor, the full-floor scaffolding can be calculated. The full-floor scaffolding is calculated based on the indoor net area. When its height is between 3.61 and 5.2m, the basic layer is calculated. When it exceeds 5.2m, each additional 1.2m is calculated as an additional layer, and less than 0.6m is not counted. The additional layer is calculated according to the following formula: Full-floor scaffolding additional layer = [indoor net height-5.2 (m) V12 (m)
(3) When the main scaffolding cannot be used for exterior wall decoration, the exterior wall decoration scaffolding can be calculated. The exterior wall decoration scaffolding is calculated based on the designed exterior wall decoration area and the corresponding quota items are applied. The exterior wall decoration scaffolding is not calculated for exterior wall painting and coating.
(IV) After the full-floor scaffolding is calculated according to the standard scaffolding, the interior wall decoration project will no longer calculate the scaffolding.
5. Other scaffolding
(1) For wall scaffolding, the calculation is based on the masonry height from the outdoor natural floor to the top of the wall multiplied by the length in square meters. The corresponding items of single-row inner scaffolding shall apply to wall scaffolding.
(2) For stone masonry walls, when the masonry height is above 10mm, the calculation is based on the designed masonry height multiplied by the length in square meters, and the double-row inner scaffolding items shall apply.
(3) For horizontal protection frames, the calculation is based on the horizontal projection area of the actual paving board in square meters.
(4) For vertical protection frames, the calculation is based on the height from the natural floor to the topmost horizontal bar multiplied by the actual length of the erection in square meters.
(5) For cantilever scaffolding, the calculation is based on the length of the erection and the number of layers in extended meters.
(6) For suspended scaffolding, the calculation is based on the horizontal projection area of the erection in square meters.
(7) For chimney scaffolding, the calculation is based on the number of seats according to the different erection heights. Concrete chimneys and simple warehouses constructed by sliding formwork are not calculated separately.
(8) Elevator shaft scaffolding is calculated as a single hole per seat.
(9) Inclined paths are calculated as seats for different heights.
(10) For silo scaffolding, regardless of whether it is a single unit or a group of silos, it is calculated in square meters based on the perimeter of the outer edge of the single unit multiplied by the height from the designed outdoor floor to the top of the silo, and the double-row external scaffolding project is applied.
(11) Water (oil) tank scaffolding is calculated in square meters based on the perimeter of the outer wall multiplied by the height from the outdoor floor to the top of the tank wall. When the height of the water (oil) tank is more than 1.2m from the floor, the double-row external scaffolding project is applied.
(12) Equipment foundation scaffolding is calculated in square meters based on its outer perimeter multiplied by the height from the floor to the outer top edge, and the double-row internal scaffolding project is applied.
(13) The vertical enclosed engineering volume of a building is calculated based on the vertical projection area of the enclosed surface.
(14) Vertical hanging safety nets are calculated in square meters based on the actual length of the net frame multiplied by the actual height.
(15) The area of the cantilevered safety net is calculated based on the horizontal projection area of the cantilever.
Post time: Nov-20-2024