A professional who positions and secures sheets of glass on table preparatory to grinding and polishing operations. Responsibilities include:

• Dumps quantity of plaster onto table and spreads it, using trowel.
• Guides sheets of glass, lowered by overhead crane, onto plaster-covered table so that glass sheets lie end to end.
• Inserts stubs (wooden blocks) between sheets to prevent chipping.
• Drives wood pegs up through holes along edge of table to prevent glass from shifting or sliding from table.
• Fills spaces between sheets with plaster to provide continuous smooth surface for grinding and polishing.