Trenching and Shoring
Trenching and Shoring Quick Guide
- What is a Trench?
- A narrow excavation that is deeper than it is wide
- No more than 15 feet wide at the bottom
- What type of factors affect the trench?
- Soil Strength
- Soil Type
- What type of soil(s) are at UCI?
- There are 3 type of Soil: Class A, Class B, Class C
- UCI is considered Class C, unless classified if differently by a Competent Person. No soil at UCI will be classified as Type A.
- What does a competent person do?
- Initial Classification of soil and trench
- Ability to test for hazards
- Daily inspection of trench
- Inspects trench as required or after any condition changes
- Has authority of Stop work
- How do I enter/exit a trench?
- A ladder/ramp/stair may be used
- An egress must be provided ever 25 ft. off lateral travel
What you need to know
- The Trench must be inspected by the competent person daily before any my enter
- Never enter a trench filled with water or if open utilities are showing
- Competent Person requirements: contact the FM Safety Coordinator (824-5066) or EH&S (824-9940)
- Training requirements:
- Awareness level – offered online or in-person class
- Competent Person – contact EH&S for assistance
- Initial Job Hazard Assessment and Trench Entry and Authorization form for regularly scheduled and emergency trenching activities
- Daily/As Required Trench Inspection for regularly scheduled and emergency trenching and shoring activities
- The requirements will vary according to each confined space so please contact EHS for clarification but the basic PPE needs will consist of the following: Hard Hat, Protective boots/shoes, Googles/Safety glasses, Protective clothing, and protective gloves. Additional PPE Requirements (Entry specific): Harness, Tripod, Respirator
- Hazardous Atmosphere Equipment: 4-Gas meter, air blower/ventilation
- 4-Gas meters are only to be used by trained personnel. Otherwise a representative from EHS must be present to verify gas readings. Meters must be calibrated before use and in current annual calibration requirements.
- All equipment shall be inspected before use to verify it is in good condition
- Never enter a trench unless cleared by the competent person
- Traffic control shall be used in area where there is traffic
- Trench will be benched or shored as required by soil type and depth. (Competent person will make that decision)
- Utilities shall be checked and marked ahead of project by checking with Dig Alert.
- If you have questions on trench shoring or other equipment, please check with EHS prior to purchase