Operation changes the hardware
A single gas-strut sash, four folding panels and a pocketing slider may cover similar area but use completely different frames and hardware.
Size changes more than material
Wider or taller glass can change thickness, heat treatment, sash reinforcement, panel count, strut force, actuators and structural requirements.
Options belong on the same record
Low-E coatings, laminated glass, screens, motorization, custom finishes, sill changes and commercial hardware can each change the total.
Freight is a separate calculation
Crate dimensions, weight, origin, destination, residential or commercial access, equipment, appointment and damage inspection affect delivery.
Turn the guide into a real opening schedule.
Keep every dimension, option, pressure, document, and delivery note connected to the same opening ID.
Start the configurationQuestions about this topic
Is there a reliable price per square foot?
Only when a verified manufacturer table explicitly uses one for the exact product and range. It should not be inferred from a few examples.