What is the depth that of a trench that requires employees to be protected from a cave ins?
What is 4 feet and over?
This organization requires that trenches be inspected daily and as conditions change?
What is WISHA?
The depth that WISHA requires safe access and egress be provided is?
What is 4'?
The simple slope requirement for a general excavation 20' or less depth in Class C Soils is?
What is 1.5 to 1?
These are not designed to prevent cave-ins, but to protect employees in the event of a cave-in
What is a trench box (shielding)
This Organization must be called at least 48 days prior to any digging to let them know you could be working near underground utility lines?
What is 811?
Soil classifications are made on the basis of at least these two test
What is 1 visual and 1 manual
When digging, you find a run of yellow plastic marker tape. What does this mean?
What is that there is a buried gas service and further excavation must be carried out with care
Trenches how many feet deep in loose soils, requires a protective system?
4 feet
What is the depth of a ditch that requires a protection system to be designed by a registered professional engineer?
What is over 20 feet?
If a hazardous atmosphere is anticipated these are the three things you should test for before entering a trench and periodically while working within a trench are?
What are oxygen, flammability and toxic gases
The simple slope requirement for a Class B Soil 20 ft or less in depth is?
What is 1 to 1?