Anti cracking steel mesh is a commonly used building material in the construction industry, which is convenient and fast to use. Let's take a look together.
What is anti cracking steel mesh and what is the allowable error in the specification of the protective layer of anti cracking steel mesh? Answer: Anti cracking steel mesh is a steel mesh composed of steel bars with a spacing of 150-200mm and a diameter of 4-6 mm, which is used to resist the shrinkage of concrete and the constraint stress caused by temperature changes in the cast-in-place slab. It is also set up to prevent the shrinkage of concrete caused by the thickness of the protective layer on the face of underground waterproofing, which is greater than 50mm and the protective layer is too thick. It is called anti cracking steel mesh.
For example, in areas where no steel bars are installed on the floor or roof panels, or where the steel bars are insufficient, especially in the upper part of large-span two-way slabs, the steel bars arranged in two orthogonal directions to reduce temperature induced cracks are called temperature bars. For underground waterproofing, if the thickness of the facing protective layer is greater than 50mm and the specifications require the installation of crack resistant steel mesh, etc.
What is the allowable error in the specification of the protective layer for crack proof steel mesh?
Answer: There may not be any allowable deviation regulations for the protective layer of "crack proof steel mesh" yet. But my opinion: in the floor slab and roof panel (I think it is better to lean upwards), according to the current acceptance regulations, the anti cracking steel mesh should be set in the middle when the thickness of the underground waterproof facing protective layer is greater than 50mm, and there is no provision for allowable deviation. However, I believe that leaning outwards is better and can play a role in anti cracking.