What Is Formwork Timber?

It consists of a panel and a support system. The panel is the part that forms the concrete; the support system is the part of the structure that stabilizes the position of the panel and supports the upper load. The quality of the formwork is related to the quality of the concrete project. The key lies in accurate dimensions, firm assembly, tight joints, and easy assembly and disassembly. According to the form and characteristics of the structure, the appropriate form template should be selected to obtain good technical and economic effects. Formwork and support systems for large and special projects are calculated to verify their stiffness, strength, stability, and ability to withstand lateral pressure.

1. The basic template uses pine wood board, poplar wood board, eucalyptus wood board,

1. Ensure the accuracy of the shape, size and mutual position of each part of the concrete structure and components.

1. Selection of flat plate and support: The flat plate uses nine plywood, the keel uses 60 × 80 square wood, the support uses wooden support, the small head diameter is not less than 70mm, the horizontal support uses 400 × 500 square wood, and the bottom of the support uses 20mm thick wood.

2. Load calculation:

, the template weight is 0.3KN per meter;

, the weight of 2.4KN;

Rebar weight 0.2KN;

,

1. Install the door opening template according to the position line that has been played.

1. Leveling the elastic line: Mix the cement mortar and leveling layer according to the elevation, place the fixed-pull pier according to the position line, and lead the elastic line of the column side line out.

2. Install the column template (insert the reinforcing bars and install the embedded parts in the middle).

3. Install fences and hoop to correct the cross-sectional dimensions, position and elevation for temporary fixation.

4.Use a wire hammer,

1. The non-load-bearing side template should be strong enough to keep its surface and edges and corners from being damaged by demolding. Generally, it can be removed after 3 days.

2. The load-bearing formwork should be removed after the concrete has reached the following strength.

3. The cricket strength of the plate template reaches 75% (that is, 20 days)

4. The strength of the soleplate of the bottom beam of the single beam reaches 100% (ie 25 days)

5. The concrete strength of the cantilever beam template reaches 100% (ie 28 days)

6. When the load-bearing formwork is dismantled and its upper department is under construction load, temporary support must be added. ^[3]

1. Do not use decayed, twisted and other timbers for formwork support. The top support should be vertical, the bottom end should be flat and solid, and padded wood should be used. The wooden wedge should be nailed, and it should be fastened with horizontal rods and scissors.

2. The supporting mold should be carried out according to the procedure. Before the template is not fixed, the next procedure is not allowed. It is forbidden to use the pull rod to support the climbing up and down.

3. Pillar formwork supporting more than 4.0m must be firmly secured around it. A workstation should be set up during operation. Horsestools other than 4.0m can be used for operation. The supporting beam formwork should be set up with a temporary working platform and should not be operated on the column formwork. And walking on beam formwork.

4. The removal of the formwork should be agreed by the on-site construction staff. Important parts must be approved by the company's quality and safety department. The operation should be performed in sequence. Strict prying, hard smashing, or large area prying and pulling down are strictly prohibited. After the completion, no loose or suspended formwork shall be left, and the removed formwork shall be promptly transported to the designated place for centralized storage to prevent iron nails.

5. Do not stand under the mold to prevent injury from sudden fall.