First, calculation rules
(I) When calculating the internal and external wall scaffolding, the area occupied by door and window openings, empty circle openings, etc. shall not be deducted.
(II) When the height of the same building is different, it should be calculated separately according to different heights.
(III) The scope of the contracted project by the general contractor does not include exterior wall decoration projects or exterior wall decoration. For projects that cannot be constructed using the main construction scaffolding, the main external scaffolding or decorative external scaffolding projects can be applied separately.
Second, external scaffolding
(I) The height of the building’s external wall scaffolding is calculated from the designed outdoor floor to the eaves (or parapet top); the project is calculated in square meters according to the length of the outer edge of the external 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 external wall) multiplied by the height.
(ii) For masonry heights below 15m, the calculation shall be 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 a lightweight block wall), the calculation shall be based on double-row scaffolding; for building heights exceeding 30m, the calculation may be based on double-row scaffolding of a steel cantilever platform according to the project conditions.
(iii) For independent columns (cast-in-place concrete frame columns), the calculation shall be 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 shall be applied. For cast-in-place concrete beams and walls, the calculation shall be 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 shall be applied.
(iv) For steel platform external cantilever pipe frames, the calculation shall be 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 overhang has been comprehensively determined. When used, it is applied according to the setting height of the quota items.
Third, internal scaffolding
(i) 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 is calculated as a single row of internal scaffolding; when the height exceeds 3.6m and is less than 6m, it is calculated as a double row of internal scaffolding.
(ii) The internal scaffolding is calculated according to the vertical projection area of the wall surface, and the internal scaffolding project is applied. Various lightweight block walls that cannot leave scaffolding holes on the internal walls are subject to the double row of the internal scaffolding project.
Fourth, decorative scaffolding
(i) When the internal wall decoration with a height of more than 3.6m cannot use the original masonry scaffolding, the decorative scaffolding can be calculated according to the internal scaffolding calculation rules. The decorative scaffolding is calculated by multiplying the double row of internal scaffolding by a coefficient of 0.3.
(ii) 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)]/1.2 (m)
(iii) 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 painting.
(iv) After the full-floor scaffolding is calculated according to regulations, the interior wall decoration project will no longer calculate the scaffolding.
Fifth, other scaffolding
(i) For wall scaffolding, it is calculated in square meters by multiplying the masonry height from the outdoor natural floor to the top of the wall by the length. The corresponding items of single-row inner scaffolding are applied to wall scaffolding.
(ii) For stone masonry walls, when the masonry height is above 1.0mm, it is calculated in square meters by multiplying the designed masonry height by the length, and the double-row inner scaffolding items are applied.
(iii) For horizontal protection frames, it is calculated in square meters by the horizontal projection area of the actual paving.
(iv) For vertical protection frames, it is calculated in square meters by multiplying the erection height between the natural floor and the topmost horizontal bar by the actual erection length.
(v) For cantilever scaffolding, it is calculated in extended meters by the erection length and number of layers.
(vi) For suspended scaffolding, it is calculated in square meters by the erection horizontal projection area.
(vii) For chimney scaffolding, it is calculated in seats according to different erection heights. Concrete chimneys and silos constructed with sliding formwork are not calculated separately for scaffolding.
(VIII) Elevator shaft scaffolding is calculated as a single hole.
(IX) Inclined paths are calculated as seats at different heights.
(X) For silo scaffolding, regardless of whether it is a single tube or a silo group, it is calculated in square meters based on the perimeter of the outer edge of the single tube multiplied by the height between the designed outdoor floor and the top of the silo, and the double-row external scaffolding project is applied.
(XI) Water (oil) tank scaffolding is calculated in square meters based on the perimeter of the outer wall multiplied by the height between the outdoor floor and 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.
(XII) Equipment foundation scaffolding is calculated in square meters based on its outer perimeter multiplied by the height between the floor and the outer top edge, and the double-row internal scaffolding project is applied.
(XIII) The vertical enclosed engineering volume of the building is calculated based on the vertical projection area of the enclosed surface.
(XIV) The vertical hanging safety net is calculated by multiplying the actual length of the frame by the actual height in square meters.
(XV) The cantilevered safety net is calculated by the horizontal projection area of the cantilevered safety net.
Post time: Jun-06-2025