[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR75.211]

[Page 463]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 75--MANDATORY SAFETY STANDARDS--UNDERGROUND COAL MINES--Table of Contents
 
                         Subpart C--Roof Support
 
Sec. 75.211  Roof testing and scaling.

    (a) A visual examination of the roof, face and ribs shall be made 
immediately before any work is started in an area and thereafter as 
conditions warrant.
    (b) Where the mining height permits and the visual examination does 
not disclose a hazardous condition, sound and vibration roof tests, or 
other equivalent tests, shall be made where supports are to be 
installed. When sound and vibration tests are made, they shall be 
conducted--
    (1) After the ATRS system is set against the roof and before other 
support is installed; or
    (2) Prior to manually installing a roof support. This test shall 
begin under supported roof and progress no further than the location 
where the next support is to be installed.
    (c) When a hazardous roof, face, or rib condition is detected, the 
condition shall be corrected before there is any other work or travel in 
the affected area. If the affected area is left unattended, each 
entrance to the area shall be posted with a readily visible warning, or 
a physical barrier shall be installed to impede travel into the area.
    (d) A bar for taking down loose material shall be available in the 
working place or on all face equipment except haulage equipment. Bars 
provided for taking down loose material shall be of a length and design 
that will allow the removal of loose material from a position that will 
not expose the person performing this work to injury from falling 
material.