trench boxes
trench boxes
(OP)
This is continued from the Pit Undperinning - Jacking or Shims (or none) thread
Hi PEInc
You bring up another issue that I've been mulling over - if you're using a trench box, when do you have to close off the ends of the box? There isn't anything in OSHA regs that directly address the issue other than that a competent person has to ok anything you're doing. Some utilities require that the trench boxes be closed off on all sides and that's certainly a safe default. And I wouldn't want to be standing under a ten-foot high soil wall even if it was a stiff clay and the opening was only 2 feet wide. But I know it is done having seen it myself. Someone was killed in Texas last year when he wandered past the end of a trench box at exactly the wrong moment.
Hi PEInc
You bring up another issue that I've been mulling over - if you're using a trench box, when do you have to close off the ends of the box? There isn't anything in OSHA regs that directly address the issue other than that a competent person has to ok anything you're doing. Some utilities require that the trench boxes be closed off on all sides and that's certainly a safe default. And I wouldn't want to be standing under a ten-foot high soil wall even if it was a stiff clay and the opening was only 2 feet wide. But I know it is done having seen it myself. Someone was killed in Texas last year when he wandered past the end of a trench box at exactly the wrong moment.





RE: trench boxes
Mike Lambert
RE: trench boxes
If earth is not in contact against the 4 sides of a trench box, it is not really an earth retaining system. It is only protecting people inside the box. In the attached photo, it is my opinion that the worker is not properly protected and neither is the RR track.
www.PeirceEngineering.com
RE: trench boxes
www.PeirceEngineering.com
RE: trench boxes
most trench boxes are not 10 feet tall, they are shorter and are stacked for deeper trenches. The photo shows a stacked box.
RE: trench boxes
www.PeirceEngineering.com
RE: trench boxes