Arrange them at equal intervals along the length according to the calculated quantity. For on-site construction, it is recommended to take a clear spacing of 1000mm, with the allowance at both ends evenly distributed. All shuttering magnets shall be uniformly arranged at the rigid back edge at the bottom of the formwork to prioritize the lateral pressure resistance of the lower part.

The nominal value of a shuttering magnet is vertical suction force. When used to resist horizontal formwork expansion force, it shall be converted according to the 0.5 horizontal resistance reduction coefficient commonly used in the prefabrication industry. Example: For a shuttering magnet with a rated vertical suction of 24kN per unit, effective horizontal resistance = 24kN × 0.5 = 12kN per unit.

The shuttering magnet cleaning machine can efficiently remove stubborn attachments such as concrete residues and iron filings on the suction surface, eliminate suction loss caused by gaps, help restore the effective suction of shuttering magnets that "demagnetize" due to dirty contact surfaces, and extend the service life of shuttering magnets.

No, overall magnetization is not feasible. A shuttering magnet is assembled with multiple magnets of different polarities, and cannot be magnetized as a whole in a magnetizer like a single magnet. To restore suction, you must first identify the specific cause, and restore magnetism through targeted measures such as cleaning the contact surface, repairing the assembly structure, and replacing damaged magnets.

Under normal working conditions, NdFeB permanent magnets themselves will not demagnetize naturally. Most suction drops on site are not caused by natural magnetic attenuation of the magnet itself, but by reduced effective suction due to external or structural factors such as foreign matters on the contact surface, structural loosening, magnet damage, and over-temperature operation.

The maximum operating temperature of sintered NdFeB material can reach 230°C, and even the lowest-performance grade has a maximum operating temperature of 80°C. Most conventional shuttering magnets adopt N or M grades. When the curing temperature of PC components is lower than 80°C, it has no adverse effect on the magnetism. Higher-grade materials are available for high-temperature working conditions.