Four representative values are given in the load specification: standard value, combined value, frequent value and quasi-permanent value. For permanent loads, standard values should be used as representative values, and for variable loads, standard values, combined values, frequent occurrence values and quasi-permanent values should be used as representative values according to design requirements. The standard value of load is the basic representative value of load, and other representative values can be obtained by multiplying the standard value by the corresponding coefficient.

Extended data

The uniqueness of gravity

Gravity is essentially different from elasticity, friction and electric field force.

Only gravity and inertia force can be qualified as components of gravity, because gravity and inertia force act on every element of an object at the same time, which makes the object gain weight.

Elastic force and friction force can only act on a part of the object. The electric field force can only act on the part of the object, because when the conductor in the electric field is electrostatically balanced, the charge is distributed in the part of the conductor, and after the insulator is polarized, the charge is also distributed in the part of the insulator.

The magnetic field force can only act on the local part of the object, because the permanent magnet has magnetic poles, and the soft magnetic field is magnetized in the magnetic field to appear magnetic poles. These forces acting on the local part of the object can't make the object gain weight like gravity and inertia force.

Baidu Encyclopedia-Representative Value of Gravity Load

Baidu Encyclopedia-Load Representative Values