Listers: Movable guardrail counterweights are typically solid / non-flowable. There is a proposal to use water as a guardrail stanchion counter weight on a flat roof for a maintenance project (not a roofing project). Setting aside the risk management question, is there any OSHA language on this? I have looked at sbpt m and a few LOI's and so far it looks as though osha is silent on this. Thanks d [log in to unmask] Disclaimer: Information in this message or an attachment may be government data and thereby subject to the Minnesota Government Data Practices Act, Minnesota Statutes, Chapter 13, may be subject to attorney-client or work product privilege, may be confidential, privileged, proprietary, or otherwise protected, and the unauthorized review, copying, retransmission, or other use or disclosure of the information is strictly prohibited. If you are not the intended recipient of this message, please immediately notify the sender of the transmission error and then promptly delete this message from your computer system. --- This e-mail is from the [log in to unmask] list. Archives of list discussions can be found at http://list.uvm.edu/archives/safety.html