AT THE POINT WHEN THE INJURY OCCURRED ONE END OF THE GRATING WAS SUSPENDED WITH A CHAIN FALL AT THE TOP OF THE BAGHOUSE. THE OTHER END HAD BEEN LOWERED TO THE FLOOR. THE FIP WINCH WAS ALSO ATT ACHED TO THE CENTER OF THE GRATING FOR ADDED SUPPORT. EE WAS ON THE WEST SIDE & HIS FOREMAN WAS ON THE EAST SIDE OF THE LOWERED END OF THE GRATING. AS THEY LIFTED, THE GRATING SLID SUDDENLY C