I. 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) 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.
II. Calculation method for external scaffolding
(1) 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.
(2) For masonry heights below 15m, single-row scaffolding shall be used for calculation; 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), double-row scaffolding shall be used for calculation; for building heights exceeding 30m, double-row scaffolding of steel cantilever platform may be used for calculation according to the project conditions.
(3) Independent columns (cast-in-place concrete frame columns) shall be 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 shall be applied. For cast-in-place concrete beams and walls, the height between the designed outdoor floor or the upper surface of the floor slab and the bottom of the floor slab shall be multiplied by the net length of the beam and wall in square meters, and the double-row external scaffolding project shall be applied.
(4) For steel platform cantilever pipe racks, the length of the outer edge of the exterior wall multiplied by the designed height shall be calculated in square meters. The quota for the width of the platform cantilever has been comprehensively determined and shall be applied separately according to the setting height of the quota items when used.
3. Calculation method of inner scaffolding
(1) For the inner 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 inner scaffolding; when the height exceeds 3.6m and is less than 6m, it shall be calculated as a double row of inner scaffolding.
(2) The inner scaffolding is calculated based on the vertical projection area of the wall surface, and the inner scaffolding project is applied. For various lightweight block walls that cannot leave scaffolding holes on the inner wall, the double row of inner scaffolding project is applied.
4. Calculation method of decorative scaffolding
(1) When the original masonry scaffolding cannot be used for the decoration of the inner wall with a height of more than 3.6m, the decorative scaffolding can be calculated according to the calculation rules of the inner scaffolding. The decorative scaffolding is calculated by multiplying the double row of inner 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-house 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)
(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 painting.
(4) After the full-floor scaffolding is calculated according to the regulations, the interior wall decoration project will no longer calculate the scaffolding.
V. Calculation method of other scaffolding
(1) For fence scaffolding, it is calculated in square meters by multiplying the masonry height from the outdoor natural floor to the top of the fence by the length. The fence scaffolding applies the corresponding items of single-row interior scaffolding.
(2) For stone masonry walls, when the masonry height is above 1.0 mm, the design masonry height is multiplied by the length in square meters, and the double-row inner scaffolding project is applied.
(3) The horizontal protection frame is calculated in square meters according to the horizontal projection area of the actual paving board.
(4) The vertical protection frame is calculated in square meters according to the height between the natural floor and the topmost horizontal bar multiplied by the actual length of the erection.
(5) Cantilever scaffolding is calculated in extended meters according to the erection length and number of layers.
(6) Suspended scaffolding is calculated in square meters according to the horizontal projection area of the erection.
(7) Chimney scaffolding is calculated in seats according to different erection heights. Concrete chimneys and silos constructed with sliding formwork are not calculated separately.
(8) Elevator shaft scaffolding is calculated in seats according to a single hole.
(9) Inclined ramps are calculated in seats according to different heights.
(10) For scaffolding of silos, regardless of whether they are single-tube or group silos, the circumference of the outer edge of the single tube is multiplied by the height between the designed outdoor floor and the top of the silo, and the calculation is in square meters, and the double-row external scaffolding project is applied.
(11) For scaffolding of water (oil) tanks, the circumference of the outer wall is multiplied by the height between the outdoor floor and the top of the tank wall. The calculation is in square meters. For water (oil) tanks that are more than 1.2m above the floor, the double-row external scaffolding project is applied.
(12) For scaffolding of equipment foundations, the circumference of the outer shape is multiplied by the height between the floor and the outer shape top edge, and the calculation is in square meters, and the double-row internal scaffolding project is applied.
(13) The vertical enclosure of a building is calculated according to the vertical projection area of the enclosed surface.
(14) The vertical hanging safety net is calculated according to the actual length of the net frame multiplied by the actual height, and the calculation is in square meters.
(15) The cantilevered safety net is calculated according to the horizontal projection area of the cantilevered safety net.
Post time: Jun-12-2024