The thickness of wooden formwork varies according to different usage scenarios and structural requirements, usually ranging from 12mm to 40mm. Among them, 12mm, 15mm and 18mm are common thicknesses, and special parts (such as the bottom of beams) may reach 40mm.

Common Thicknesses of Wooden Formwork and Their Applicable.

12 - millimeter Thickness

Features: Light and easy to carry, with relatively low cost.

Applicable Scenarios: Non - load - bearing structures (such as simple partition walls, temporary buildings), floor formwork, column formwork.

15 - millimeter Thickness

Features: A balance between strength and toughness, with relatively strong versatility.

Applicable Scenarios: Residential floor slabs, staircases and other parts.

18 - millimeter Thickness

Features: Strong load - bearing capacity and high stability.

Applicable Scenarios: Load - bearing beams in high - rise buildings, large - scale frame columns and other key structures.

Thickness of Special Parts

Bottom Beam Formwork: Made of pine wood, usually with a thickness of 40mm, and needs to bear large loads.

Side Plate of Ground Beam: With a thickness of 20mm, mostly made of pine or eucalyptus boards.

National Standards and Material Requirements

National standards stipulate that the thickness range is 12 - 20mm, but in actual projects, it will be adjusted according to structural requirements.

Materials should avoid brittleness and deformation due to moisture absorption, and the support system should meet the stiffness requirements (for example, the small - end diameter of Chinese fir logs should be ≥70mm).