Glazing Fundamentals and Safety
What this domain tests
Glazing Fundamentals and Safety covers glass handling, load awareness, personal protective equipment, and jobsite controls that prevent cuts, falls, and struck-by injuries. Expect questions on safe lifting, suction-cup use, storage, and basic glazing math.
Core rules
- Treat every pane as heavy and fragile. Annealed float glass weighs about 3.3 lb/ft² at 1/4 in.; weight rises with thickness and with insulating glass unit components.
- Wear ANSI Z87.1 eye protection, cut-resistant gloves, and sleeves when handling cut glass. Use hard hats and fall protection where required; OSHA construction fall protection generally starts at 6 ft.
- Carry glass vertically with vacuum lifters or two-person teams; never carry a large lite flat or by one edge. Store in an A-frame rack with edge protection.
- Inspect suction cups, slings, and racks before use; barricade drop zones and never work under a suspended load.
- Keep cuts and breakage controlled: score and snap on a clean, level surface; dispose of scrap in rigid containers.
Worked example
A 4 ft × 6 ft lite of 1/4 in. glass is 24 ft². At 3.3 lb/ft², it weighs about 79 lb. That exceeds a comfortable one-person lift, so plan a two-person carry or a vacuum lifter, verify the route, and use a rack-not a cart-for transport.
Traps that cost marks
Underestimating insulating glass unit weight, using a damaged cup, carrying glass flat, skipping edge protection, and treating fall protection as optional are common errors. Also, safety glasses alone do not protect forearms from cuts.