【Daily Discussion】Public Utilities – Water Resources and Hydropower – 20210503
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What are the strength requirements for removing formwork? Feel free to participate actively in the discussions – the system offers generous rewards for answering questions from VIP members! ! !
The deadline for removing formwork from cast-in-place monolithic structures should be in accordance with the design specifications; if no such specifications are provided, the following requirements shall be met: (1) For formwork that does not bear loads, it can be removed only when the concrete strength is such that its surface and edges are not damaged as a result of removal of the formwork. (2) The load-bearing formwork shall be removed only when the concrete has reached the strength specified in the standards.
1. Slab: When the span ≤ 2, it is ≥50%； When the span is >2 and ≤8, it is ≥75% ； When span > 8, it is ≥100% ； 2. Beams, arches, shells: ≥75 when span ≤8 ； When span > 8, it is ≥100% ； 3. Cantilever members: Regardless of the span, 100% must be achieved. 4. The formwork for the foundations, columns, and cap beams, as well as the formwork for beams and walls, can be removed as long as the strength is sufficient to ensure that their surfaces and edges are not damaged during removal. However, for large formwork used on walls, it is required that the strength reach 1 N/mm2 at room temperature before it can be removed.
1. Slab: When the span ≤ 2, it is ≥50%； When the span is >2 and ≤8, it is ≥75% ； When span > 8, it is ≥100% ； 2. Beams, arches, shells: ≥75 when span ≤8 ； When span > 8, it is ≥100% ； 3. Cantilever members: Regardless of the span, 100% must be achieved. 4. The formwork for the foundations, columns, and cap beams, as well as the formwork for beams and walls, can be removed as long as the strength of these elements is sufficient to ensure that their surfaces and edges are not damaged during removal. However, for large formwork used on walls, it is required that the strength reach 1 N/mm2 at room temperature before it can be removed.
(1) For non-load-bearing formwork, the concrete can be removed only when its surface and edges are not damaged as a result of removing the formwork. (2) The load-bearing formwork shall be removed only when the concrete has reached the strength specified in the standards.
1) For formwork that does not bear load, the concrete can be removed only when its surface and edges are not damaged as a result of removing the formwork. (2) The load-bearing formwork shall not be removed until the concrete has reached the specified strength.
(1) For non-load-bearing formwork, the concrete can be removed only when its surface and edges are not damaged as a result of removing the formwork. (2) The load-bearing formwork shall be removed only when the concrete has reached the strength specified in the standards.
(1) For non-load-bearing formwork, the concrete can be removed only when its surface and edges are not damaged as a result of removing the formwork. (2) The load-bearing formwork shall be removed only when the concrete has reached the strength specified in the standards.
(1) For non-load-bearing formwork, the concrete can be removed only when its surface and edges are not damaged as a result of removing the formwork. (2) The load-bearing formwork shall be removed only when the concrete has reached the strength specified in the standards.
The deadline for removing formwork from cast-in-place monolithic structures should be in accordance with the design specifications; if no such specifications are provided, the following requirements shall be met: (1) For formwork that does not bear loads, it can be removed only when the concrete strength is such that its surface and edges are not damaged as a result of removal of the formwork. (2) The load-bearing formwork shall be removed only when the concrete has reached the strength specified in the standards.
1) For formwork that does not bear load, the concrete can be removed only when its surface and edges are not damaged as a result of removing the formwork. 2) The load-bearing formwork shall be removed only when the concrete has reached the strength specified in the standards.