OSHA focus four caught in or between Flashcards
how many people die from caught in injuries
100 annually
caught vs struck
if injury is caused by by hit= struck
if injury is caused by be crushing=caught in
are scaffolding
demolition common for caught in , between hazards
yes
1 cubic of soil weighs
2700 lbs
after a cave in how long does the worker have to be rescued safely
4 minutes
what are the requirements for a trench over 5 feet deep
they must use protective systems
How far away must ladder be from a worker in a trench
25 feet
What are some preventative ways for removing the risk of cave ins
sloping angling the soil
benching
shoring
shielding
What does sloping, shoring and shielding, benching mean
sloping involves cutting back the trench wall at an angle inclined away from the excavation.
Shoring requires installing aluminum hydraulic or other types of supports to prevent soil movement and cave-ins.
Shielding protects workers by using trench boxes or other types of supports to prevent soil cave-ins.
Benching is a safety method used in excavations to prevent cave-ins. It involves excavating the sides of an excavation to create a series of horizontal steps with near-vertical surfaces between them.
what is a trench box ?
Also known as trench shields or sewer boxes, trench boxes are steel or aluminum structures that are inserted into a trench or other excavation to secure the sidewalls from cave-in or erosion.
Material -handling equipment must be equipped with what
rollover protective structures
What are the OSHA requirements for trenches 5-20 feet deep
it must be protected by slopping benching and trench box or shield
adequate means of egress and access is required
What are the OSHA requirements for trenches over 20 feet deep
a professional engineer must design the system
