Factories shipping aluminum windows and door units often ask for a standard frame first. The problem is that framed products do not behave like raw glass. Width, edge protection, lifting points, and spacing all change once the panel includes a finished frame.
Why a standard rack can create new damage risks
If the rack width is too tight, framed units rub during transfer. If it is too wide, the load shifts and wastes container space. That is why projects involving door and window units usually need custom rack width and actual unit dimensions before the rack layout can be confirmed.

What buyers should confirm early
- Single unit width and height
- How many units need to be stored per side
- Whether the rack is used once or returned
- Whether lifting, forklift entry, or casters are required
Why custom spacing changes container planning
Once the unit size changes, the rack width changes with it. That directly affects how many racks fit inside a 40HQ. For framed products, container quantity and rack structure have to be calculated together rather than separately.
If your load is aluminum windows, doors, or framed glazing units, send the frame section size and target loading quantity first. That will produce a better rack plan than choosing from a standard list.
