With the development of construction industry, formwork system, an essential supporting system tools to shape the concrete, has been developed through the forms of wooden formwork, steel formwork, plastic formwork, and aluminum formwork.etc. Everyone knows the functions of the formwork system, but does anyone of you know how to remove the formwork system? Below we ADTO GROUP will show you the answer.

During the stripping of formwork system, the following points must be remembered:

1. The approval from the engineer should be obtained for the sequence and pattern of formwork removal before the formwork system demolition.

2. Formwork should not be removed until the concrete has developed sufficient strength to support all loads placed upon it. The time required before formwork removal depends on the structural function of the member and the rate of strength gain of the concrete. The grade of concrete, type of cement, water/cement ratio, temperature during curing, etc. influences the rate of strength gain of concrete.

3. The formwork parts and connections should be arranged in a way that makes formwork removal easy and simple, prevents damage to concrete and formwork planks so that it can be reused without extensive repair.

4. Beam and joist bottoms should remain in place until final removal of all shoring under them are done.

5. Joist forms should be designed and removed so that the shores may be removed temporarily to permit removal of joist forms but must be replaced at once. The shores and joists will be dismantled beginning from the middle of the member’s span, continuing symmetrically up the supports.

6. The formwork removal procedure should be supervised under the engineer to ensure that quality of hardened concrete in the structural member, i.e. it should be free from or has minimum casting defects such as honeycombing, size and shape defects, etc. These defects in concrete influence the strength and stability of the structure. Thus immediate repair works can be done or the members can be rejected.

7. The separation of forms should not be done by forcing crowbars against the concrete. It may damage the hardened concrete. This should be achieved by using wooden wedges.

Below is the removal specifications of formwork systems. For any further information about construction materials, please feel free to visit our webs.