定义由于结构、非结构元件和存储材料的自重而产生的作用，并给出其密度的数值。这些作用是通过密度乘以重力加速度和实际体积来确定的。由放置在结构上的土的重量引起的作用也进行了类似的计算。

Defines the actions due to the self-weight of structures, non-structural elements and stored materials and gives the numerical values of their densities. These actions are to be determined by multiplying the densities by the gravitational acceleration and by the actual volume. The actions caused by the weight of the earth placed on the structures are similarly calculated.