Asfahl, C Ray <br/><br/>
Job-made guardrails: are they strong enough.  [electronic resource] 

 -  Occupational health & safety (Waco, Tex.)  Mar 2007 
 - 80, 82 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0362-4064 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Accidents, Occupational--prevention & control<br/>Adult<br/>Construction Materials--standards<br/>Equipment Safety--standards<br/>Humans<br/>Middle Aged<br/>Occupational Health--legislation & jurisprudence<br/>Protective Devices--standards<br/>Safety--legislation & jurisprudence<br/>United States<br/>United States Occupational Safety and Health Administration