Elevator support bracket carbon steel galvanized bracket

Ensuring the load-bearing capacity of the galvanized sensor bracket is the key to safe design. The following methods combine international material standards and engineering mechanics principles and are applicable to the global market:

1. Material mechanical properties analysis

● Material strength: clarify the bracket material, such as Q235 steel (Chinese standard), ASTM A36 steel (American standard) or EN S235 (European standard).
● The yield strength of Q235 and ASTM A36 is generally 235MPa (about 34,000psi), and the tensile strength is between 370-500MPa (54,000-72,500psi).
● Galvanizing improves corrosion resistance and is suitable for long-term use.
● Thickness and size: Measure the key geometric parameters of the bracket (thickness, width, length) and calculate the theoretical load-bearing capacity through the bending strength formula σ=M/W. Here, the units of bending moment M and section modulus W need to be N·m (Newton-meter) or lbf·in (pound-inch) according to regional habits.

2. Force analysis

● Force type: The bracket may bear the following main loads during use:
● Static load: The gravity of the sensor and its related equipment.
● Dynamic load: The inertial force generated when the elevator is running, and the dynamic load coefficient is generally 1.2-1.5.
● Impact load: The instantaneous force when the elevator stops urgently or an external force acts.
● Calculate the resultant force: Combine the principles of mechanics, superimpose the forces in different directions, and calculate the total force of the bracket under the most extreme conditions. For example, if the vertical load is 500N and the dynamic load coefficient is 1.5, the total resultant force is F=500×1.5=750N.

3. Consideration of safety factor

Elevator-related brackets are part of special equipment and usually require a higher safety factor:
● Standard recommendation: The safety factor is 2-3, taking into account factors such as material defects, changes in working conditions, and long-term fatigue.
● Calculation of actual load capacity: If the theoretical load capacity is 1000N and the safety factor is 2.5, the actual load capacity is 1000÷2.5=400N.

4. Experimental verification (if conditions permit)

● Static loading test: Gradually increase the load in a laboratory environment and monitor the stress and deformation of the bracket until the limit failure point.
● Global applicability: While the experimental results verify the theoretical calculations, they must comply with regional regulatory requirements, such as:
● EN 81 (European elevator standard)
● ASME A17.1 (American elevator standard)