1.0.1 This code is formulated with a view to implementing the technic-economic policy in the design of grain steel silo and achieving safety and applicability, advanced technology, economy and rationality of the grain steel silo.
1.0.2 This code is applicable to the storage of grain granular material and the design of round, centrical receiving and discharging grain steel silos.
Note: grain granular material covers such cereal granular materials such as wheat, corn, rough rice, soybean and other grains with similar physical characteristics.
1.0.3 This code is applicable to round silo of welded steel, spiral crimping steel and bolt-assembled corrugated steel.
1.0.4 The designed service life of grain steel silos shall not be less than 25 years.
1.0.5 Safety class of grain steel silo structure shall be Class II; the seismic precautionary category shall be Category C and the fire resistance class may be Class II.
1.0.6 Structure of this code is designed according to the current national standard “Unified Standard for Design of Building Structures”. Design of grain steel silos shall meet not only the requirements of this code, but also those specified in relevant national current standards.
1 General Provisions 1
2 Terms and Symbols 1
2.1 Terms 1
2.2 Symbols 2
3 Basic Requirements 3
3.1 Layout Principles 3
3.2 Structure Selection 4
4 Load and Load Effect Combination 6
4.1 Basic Requirements 6
4.2 Grain Load 7
4.3 Earthquake Action 9
4.4 Load Effect Combination 10
5 Structural Design 11
5.1 Basic Requirements 11
5.2 Top of Silo 12
5.3 Silo Wall 12
5.4 Steel Silo Hopper 18
5.5 Supporting Structure and Foundation 21
6 Constructional Detail 22
6.1 Top of Silo 22
6.2 Silo Wall 22
6.3 Steel Silo Hopper 23
6.4 Supporting Structure and Opening 23
7 Process Flow Project 24
7.1 General Requirements 24
7.2 Equipment Selection 24
7.3 Dedusting System 25
7.4 Mechanical Ventilation 25
7.5 Pest Control 26
8 Electricity and Auxiliary Facility 26
8.1 General Requirements 26
8.2 Distribution Line 26
8.3 Lighting System 27
8.4 Automatic Control System 27
8.5 Grain Detection and Control System 27
8.6 Lightening Protection and Grounding System 28
8.7 Fire Water Supply 29
Appendix A Settlement Observation of Steel Silo and Pre-Loaded with Grain Test 30
Appendix B Physical Characteristics of Main Grain Granular 33
Appendix C Grain Load Coefficient 34
Appendix D Film Internal Force of Rotatory Shell in Symmetrical Loading 37
Appendix E Recommended Illumination Value 40
Explanation of Wording in This Code 41
