Issue of standard saddle dimensions
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According to the JB/T4712.1-2007 standard for saddles, the dimension of the bottom plate for a DN900 saddle is 810, while that for a DN1000 saddle is 760. Does anyone know why this is the case? Is there an error in the standard? Is there any corrigendum to the standard? What dimension do you use for the bottom plate of the DN1000 saddle?
Standard saddle supports have always been like this. It is due to the different types of their web sections.
The length of the saddle base plate is determined by the length of the web; the length of the web primarily affects the combined cross-sectional area and cross-sectional coefficient of the web and the stirrups. The DN1000 version has 4 stirrups, while the DN900 version has only 2. Although the web is shorter, the combined area and cross-sectional coefficient of the web and stirrups in the DN1000 version are still greater
The 3rd floor is the correct answer; the number and type of gussets differ, as does the type of web.
The length of the saddle base plate is determined by the length of the web; the length of the web primarily affects the combined cross-sectional area and the section modulus. The DN1000 version has 4 stirrups, while the DN900 version has only 2. Although the web is shorter, the combined area and section modulus of the web and stirrups in the DN1000 version are still greater. I also had this question before; after studying it, I understood it