Trench and Excavation Safety

The Trench and Excavation Safety course from the American Institute of Safety Professionals provides dedicated, in-depth training on OSHA 29 CFR 1926 Subpart P (Excavations), the standard that prevents trench cave-in fatalities. While the Focus Four Caught-In/Between course covers excavation cave-in as one of several caught-in hazards, this dedicated course provides the comprehensive Subpart P competency that excavation competent persons, supervisors, and safety officers need: soil classification methodology, all four protective system types with tabulated data, competent person duties in detail, access/egress requirements, water accumulation management, and the inspection programme that prevents the cave-in fatalities that continue to kill construction workers every year despite being entirely preventable.

Trench cave-in is the most predictable and most preventable cause of construction fatalities. A cubic yard of soil weighs approximately 3,000 pounds. A trench wall collapse buries workers under thousands of pounds of earth with virtually zero survival time. Every trench fatality follows the same pattern: unprotected trench, no competent person inspection, no protective system, and a wall that failed as soil physics predicted it would. This course teaches the soil science, protective engineering, and inspection discipline that breaks that pattern.

The curriculum covers excavation hazards (cave-in, falling into excavations, falling materials, hazardous atmospheres, water accumulation, utility strikes), soil classification per Subpart P Appendix A (Type A, B, C, stable rock, visual and manual tests, layered soils), protective system selection per Appendices B–E (sloping/benching, timber shoring, aluminium hydraulic shoring, trench shields), competent person requirements (daily and event-triggered inspections, soil classification authority, worker removal authority), access/egress (§1926.651(c)(2): ladder, ramp, or stairway within 25 feet of lateral travel), utility location (811/One-Call, hand digging tolerance zones), water accumulation management, fall protection at excavation edges, and the excavation permit system. All training is delivered 100 percent online through Microsoft Teams and the American Institute of Safety Professionals LMS.

Upon completion, graduates receive a certificate, wallet card, and transcript, employer-verifiable at amiosp.com/student-verifications.

Upon completing this program, participants will be able to:

• Classify soil using visual and manual tests per Appendix A: thumb penetration, dry strength, plasticity, fissures, previously disturbed soil, layered systems, and the field classification that determines which protective system is required.
• Select protective systems: sloping (Appendix B ratios: 3/4:1 Type A, 1:1 Type B, 1-1/2:1 Type C), benching (Type A only for single bench, step pattern), timber shoring (Appendix C), aluminium hydraulic shoring (Appendix D), and trench shields/shielding (Appendix E).
• Execute competent person duties: inspect excavations daily before work begins and after every rainstorm, freeze/thaw, or other condition change, classify soil, evaluate protective system adequacy, and remove workers immediately when hazardous conditions are detected.
• Ensure access/egress compliance: ladder, ramp, or stairway within 25 feet of lateral travel for all workers in excavations 4 feet or deeper, secured to prevent displacement, and extending 3 feet above the landing.
• Manage utility protection: 811/One-Call notification before digging, utility locate and mark, hand digging within tolerance zones, and the excavation procedures near buried utilities.
• Manage water accumulation: pumping, diversion, and the controls that prevent water from undermining trench walls and creating the saturated conditions that downgrade soil classification from Type A/B to Type C.

Core Curriculum Topics

• Excavation Hazards: cave-in physics, falling in, falling materials, atmospheres, water, utilities
• Soil Classification (Appendix A): Type A/B/C, stable rock, visual tests, manual tests, layered soils
• Sloping and Benching (Appendix B): maximum slopes by soil type, bench configurations
• Timber Shoring (Appendix C): cross-braces, uprights, wales, engineering data tables
• Aluminium Hydraulic Shoring (Appendix D): cylinder spacing, tabulated data, installation
• Trench Shields/Shielding (Appendix E): rated capacity, stacking, placement, end exposure
• Competent Person: daily inspection, event-triggered inspection, soil authority, removal authority
• Access/Egress: 25-foot rule, ladders, ramps, stairways, securing, 3-foot extension
• Utility Protection: 811/One-Call, locate and mark, tolerance zones, hand digging
• Water Accumulation: pumping, diversion, soil saturation, classification downgrade
• Fall Protection at Edges: guardrails, barricades, setback distances for spoil and equipment
• Excavation Permit Systems: permit elements, authorisation, documentation

Participants will receive online training through Microsoft Teams and LMS. Courses are offered by accredited broadcasters and backed by expert instruction and official study materials. All assessments are conducted online and successful participants are awarded certificates that are accepted internationally.

The Trench and Excavation Safety program is designed for construction workers, supervisors, site engineers, and safety professionals involved in excavation and trenching activities. This course focuses on identifying excavation hazards, implementing protective systems, ensuring regulatory compliance, and preventing cave-ins, falls, and other serious incidents.

Core Modules

Participants will explore essential topics to ensure safe trenching and excavation operations:

Optional / Advanced Modules

Participants may explore additional topics to enhance trench and excavation safety expertise:

The Trench and Excavation Safety program equips participants with practical knowledge, hazard recognition skills, and professional strategies required to plan, supervise, and perform excavation work safely, prevent cave-ins and injuries, and ensure full regulatory compliance on construction sites.

• No prior training required
• No academic degree required
• All instruction in English; working proficiency required

Upon completion, graduates receive an American Institute of Safety Professionals certificate, wallet card, and transcript. Employer-verifiable at amiosp.com/student-verifications.

The program is designed to offer flexible online learning with a minimum instructional contact time of 8 hours. Most learners successfully complete the course within one month, allowing them to progress at their own pace while balancing professional commitments.

Candidates can take this exam through an assigned portal from the American Institute of Safety Professionals. A passing score is 70% or higher, and exam results are provided right after by email to the address provided. The exam is open-book, allowing candidates to validate their answers. Any candidates who do not pass have 1 month after their exam to go through the training materials and can take the exam 3 additional times.

For questions about American Institute of Safety Professionals online fees, replacement certificates, additional hardbound materials or any other financial-related issues please feel free to contact accounts@amiosp.com

• Excavation competent persons designated for Subpart P compliance
• Pipe layers, utility workers, and trenching crews
• Excavation supervisors and foremen
• Safety officers managing excavation safety programmes
• Construction project managers overseeing excavation phases

Prerequisite: None. Essential for everyone involved in excavation operations.

• Trench and Excavation Safety — YOU ARE HERE (Subpart P specialist)
• OSHA Focus Four — Caught-In/Between (excavation as one caught-in hazard)
• Construction Safety Management (managing excavation within project safety)
• International Diploma in Construction Safety Management (Unit 3: excavation at diploma depth)