(1) When calculating internal and external wall scaffolding, the area occupied by openings such as doors, windows, and voids shall not be deducted.
(2) For buildings with varying heights, calculations shall be performed separately based on different heights.
(3) If the general contractor’s scope of work does not include external wall decoration, or if the external wall decoration cannot be executed using the main construction scaffolding, the main external scaffolding or decorative external scaffolding items may be applied separately.
Secondly, Calculation Rules for External Scaffolding
(1) The height of external scaffolding for buildings shall be measured from the designed outdoor ground level to the eave (or the top surface of the parapet wall). The quantity shall be calculated in square meters by multiplying the length of the external wall perimeter (including wall projections such as piers with a width exceeding 240mm) by the height.
(2) For masonry walls with a height below 15m, single-row scaffolding shall be used. For heights exceeding 15m, or even if below 15m but with door and window openings and decorative areas exceeding 60% of the external wall surface area (or for cast-in-place concrete walls or lightweight block walls), double-row scaffolding shall be used. For buildings exceeding 30m in height, steel cantilevered platform double-row scaffolding may be used based on project conditions.
(3) Independent columns (cast-in-place concrete frame columns) shall be calculated in square meters by multiplying the perimeter of the column’s structural outer edge plus 3.6m by the designed column height, and the single-row external scaffolding item shall be applied. For cast-in-place concrete beams and walls, the calculation shall be based on the height from the designed outdoor ground level or the top surface of the floor slab to the bottom surface of the slab, multiplied by the net length of the beam or wall, in square meters, and the double-row external scaffolding item shall be applied.
(4) Steel tube scaffolding with a cantilevered platform shall be calculated in square meters by multiplying the length of the external wall perimeter by the designed height. The cantilever width of the platform is comprehensively determined in the quota, and the appropriate quota item shall be selected based on the specified height during application.
Thirdly, Calculation Rules for Internal Scaffolding
(1) For internal wall scaffolding, when the height from the designed indoor ground level to the bottom surface of the roof slab (or half the height of the gable wall) is less than 3.6m (for non-lightweight block walls), single-row internal scaffolding shall be used. For heights exceeding 3.6m but less than 6m, double-row internal scaffolding shall be used.
(2) Internal scaffolding shall be calculated based on the vertical projection area of the wall surface, and the internal scaffolding items shall be applied. For various lightweight block walls where scaffolding holes cannot be left in the internal walls, the double-row internal scaffolding items shall be applied.
Post time: 2025-11-26 11:14:41