| Trenching Regulations | 208 | Manual Soil Testing | 225-227 | | Trenching Definitions | 208-213 | Trenches & Excavations | 227-229 | | Trenching Hazards | 213,214 | Excavation Protection | 229-246 | | Soil Mechanics | 214-216 | Preliminary Work | 229,230 | | Trench Failure | 217,218 | Engineering Approvals | 231 | | Types of Soil Collapse | 218-221 | Dangerous Conditions | 231,232 | | Zone of Exposure | 219 | Protection System Types | 232,233 | | Spoil Pile Slide | 219 | Sloping & Benching | 233-237 | | Side Wall Shear | 220 | Shoring | 237-240 | | Cave-ins (Sloughing) | 220 | Shielding | 241-242 | | Soil Rotation | 221 | Installation of Shoring | 243-246 | | Soil Classifications | 221,222 | Shafts & Tunnels | 247-250 | | Soil Testing | 222-227 | Trench Collapse | 250-252 | | Visual Soil Testing | 224 | Visual Soil Testing | 224 | |
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