It analyzes the common construction method to the installed height mark adjustment of the piling bar in the smelting factory building,brings forward the modified H structural section support method should be adopted to the cushion slab between the heel cushion back surface and the basic plane,and represents the design and construction process of the H structural section support in detail.

The effectiveness and the installation codes are clarified by calculation.

The influence of installing height of CNC lathe tool on radical size error;

The basic computational formula of allowable installing height was derived by using Bernoulli equation.

On the basis of preventing vapor corrosion and using the basic principle of calculating the physical volume,it is presented that the two methods of calculating the installing height by permissible vacuum suction height HS or net pump suction head Δh are corrected and their results are absolutely consistent.

Discussion on problem of cavitation and installation height of centrifugal bump;

The hydraulic calculation method for fluid delivery pipeline system of centrifugal pump and the method of determining the pump installation height are introduced.