AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

For Type A soil in an excavation no deeper than 12 feet and open no longer than 24 hours, what short-term simple slope does OSHA Appendix B allow?

Vertical (90 degrees) 1-1/2:1 (34 degrees) 1/2 horizontal to 1 vertical (63 degrees) 2:1 (26 degrees)

1/2 horizontal to 1 vertical (63 degrees)

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